Principle of progressively and strongly immobilizing polysulfides on polyoxovanadate clusters for excellent Li–S batteries application
Publication date: May 2020Source: Nano Energy, Volume 71Author(s): Ying Yu, Tianyu Li, Hongzhang Zhang, Yang Luo, Huamin Zhang, Jiangwei Zhang, Jingwang Yan, Xianfeng LiAbstractSulfur-fixing materials have important effects on lithium-sulfur batteries application, but the principles and processes are not very clear yet. For the first time, we proposed the excellent performance of (NH4)6V10O28 (NVO) clusters as sulfur-fixing materials and found that they have a unique two-step progressive sulfur-fixing mechanism. Firstly, the Li of lithium polysulfides (LiPSs) would attract the O of NVO cluster, which could widen the angle ...
Source: Nano Energy - February 22, 2020 Category: Nanotechnology Source Type: research

Li7La3Zr2O12 Sheet-Based Framework for High-Performance Lithium-Sulfur Hybrid Quasi-Solid Battery
Publication date: Available online 21 February 2020Source: Nano EnergyAuthor(s): Ayman A. AbdelHamid, Jian Liang Cheong, Jackie Y. YingAbstractApplications of lithium batteries are challenged by their unsatisfactory safety profiles. Solid-state batteries present a very promising solution to overcome the safety issues, but their performance requires major improvement. Hybrid quasi-solid electrolyte (HQSE), comprising solid and liquid components, has emerged as a practical compromise for safer and high-performance Li batteries. Li-S system is one of the most promising Li battery candidates; however, the performance of Li-S h...
Source: Nano Energy - February 22, 2020 Category: Nanotechnology Source Type: research

Highly efficient and stable Si photocathode with hierarchical MoS2/Ni3S2 catalyst for solar hydrogen production in alkaline media
Publication date: Available online 21 February 2020Source: Nano EnergyAuthor(s): Ronglei Fan, Ju Zhou, Wei Xun, Shaobo Cheng, Srinivas Vanka, Tianyi Cai, Sheng Ju, Zetian Mi, Mingrong ShenABSTRACTDesigning highly efficient and stable Si photocathodes for solar hydrogen production in alkaline electrolytes is especially challenging due to the sluggish surface kinetics for hydrogen evolution reaction (HER) and unsuccessful contact between the catalyst and Si substrate. Herein, a facile electrodeposition process is reported to integrate the hierarchical MoS2/Ni3S2 structure as a catalyst layer onto the surface of Ni protected ...
Source: Nano Energy - February 22, 2020 Category: Nanotechnology Source Type: research

Self-powered photodetectors based on CsxDMA1-xPbI3 perovskite films with high detectivity and stability
Publication date: May 2020Source: Nano Energy, Volume 71Author(s): Ludong Li, Fan Zhang, Shuai Ye, Xiao Peng, Zhenhua Sun, Jiarong Lian, Liwei Liu, Junle Qu, Jun SongAbstractMetal halide perovskites are widely studied in photodetection applications due to their outstanding optical and electrical properties. However, it is still a challenge to develop self-powered perovskite photodetectors with all the characteristics of high photoresponse performance, broad spectral response range, and excellent long-term stability. Herein, we demonstrate the high-performance self-powered photodetectors based on optimized CsxDMA1-xPbI3 (0.7
Source: Nano Energy - February 22, 2020 Category: Nanotechnology Source Type: research

Harnessing the interplay of Fe–Ni atom pairs embedded in nitrogen-doped carbon for bifunctional oxygen electrocatalysis
Publication date: May 2020Source: Nano Energy, Volume 71Author(s): Xiaofeng Zhu, Detao Zhang, Chih-Jung Chen, Qingran Zhang, Ru-Shi Liu, Zhenhai Xia, Liming Dai, Rose Amal, Xunyu LuAbstractOxygen evolution reaction (OER) and oxygen reduction reaction (ORR) both have sluggish kinetics, which normally requires the use of noble metal-based catalysts (e.g. RuO2, IrOx and Pt). Unfortunately, the high cost of these noble metals has severely restricted their large-scale applications. Herein, we report the fabrication of a cost-effective OER/ORR bifunctional catalyst by embedding atomic Fe–Ni dual metal pairs into nitrogen-d...
Source: Nano Energy - February 22, 2020 Category: Nanotechnology Source Type: research

Petaloid-shaped ZnO coated carbon felt as a controllable host to construct hierarchical Li composite anode
Publication date: May 2020Source: Nano Energy, Volume 71Author(s): Xin-Yang Yue, Jian Bao, Si-Yu Yang, Rui-Jie Luo, Qin-Chao Wang, Xiao-Jing Wu, Zulipiya Shadike, Xiao-Qing Yang, Yong-Ning ZhouAbstractPrestoring Li metal into the 3D host via thermal infusion strategy has been considered as an effective approach on suppressing Li dendrites growth of Li-metal anode during cycling. However, the fast Li infusing process generally induces uncontrollable and undesirable structures during the formation of composite Li metal anode. It is widely accepted that both physical and chemical interactions between the molten Li and the hos...
Source: Nano Energy - February 22, 2020 Category: Nanotechnology Source Type: research

Moisture-powered memristor with interfacial oxygen migration for power-free reading of multiple memory states
Publication date: Available online 19 February 2020Source: Nano EnergyAuthor(s): Ye Tao, Zhongqiang Wang, Haiyang Xu, Wentao Ding, Xiaoning Zhao, Ya Lin, Yichun LiuAbstractSelf-powered memristors have the potential capability to promote highly efficient memory and neuromorphic computing, allowing the exploration of power-free electronics for future. The present study developed a novel moisture-powered memristor, having a multi-layer structure of W/WOx/oxygen-plasma-treated amorphous-carbon (OAC)/Pt. The reversible oxygen migration across the WOx/OAC interface formed between the memristor layer and the nanogenerator layer o...
Source: Nano Energy - February 21, 2020 Category: Nanotechnology Source Type: research

Beyond Intercalation-Based Supercapacitors: The Electrochemical Oxidation from Mn3O4 to Li4Mn5O12 In Li2SO4 Electrolyte
Publication date: Available online 20 February 2020Source: Nano EnergyAuthor(s): Nan Zhao, Huiqing Fan, Mingchang Zhang, Jiangwei Ma, Chao Wang, Arun Kumar Yadav, Hua Li, Xinbiao Jiang, Xiaoqiang CaoAbstractThe difficulty of enlarging the voltage window for aqueous asymmetric supercapacitors seriously impedes the enhancement in energy density, thus affecting their practical applications. Herein, lithium-rich Li4Mn5O12 nanoflakes are firstly in situ synthesized on carbon cloth through the electrochemical oxidation of prefabricated Mn3O4 nanowalls in a traditional three-electrode cell using Li2SO4 as electrolyte. It is intri...
Source: Nano Energy - February 21, 2020 Category: Nanotechnology Source Type: research

Vertically-aligned Pt-decorated MoS2 nanosheets coated on TiO2 nanotube arrays enable high-efficiency solar-light energy utilization for photocatalysis and self-cleaning SERS devices
Publication date: May 2020Source: Nano Energy, Volume 71Author(s): Jianing Dong, Jianying Huang, Aurelia Wang, Gill V. Biesold-McGee, Xinnan Zhang, Shouwei Gao, Shanchi Wang, Yuekun Lai, Zhiqun LinAbstractThe ability to reproducibly create a surface enhanced Raman scattering (SERS) substrate renders an effective means of detecting and degrading organic contaminants. Vertically aligned (VA) nanomaterials have been extensively explored as highly efficient catalysts due to their excellent electron transportability and high concentration of exposed active edge sites. Herein, we report on a ternary ultrafast-electron-transfer h...
Source: Nano Energy - February 21, 2020 Category: Nanotechnology Source Type: research

Wire-based triboelectric resonator for a self-powered crack monitoring system
In this study, we investigated a wire-type triboelectric resonator (WTER) for monitoring cracks. Vibration of a metal wire on a dielectric film produces a resonant frequency via triboelectric outputs. We found that the tension, linear density, and wire length significantly affect the resonant frequency measured by the WTER. For a 10-cm-long wire, the WTER's sensitivity, as defined by a resonant frequency change for an elongation (i.e., Hz/mm), reached approximately 1,020 Hz/mm; however, this changed to 115 Hz/mm after an elongation of 1.5 mm. When a 40-cm-long wire was used, the sensitivity changed to about ...
Source: Nano Energy - February 21, 2020 Category: Nanotechnology Source Type: research

In situ Atomic Scale Investigation of Li7La3Zr2O12-Based Li+-Conducting Solid Electrolyte During Calcination Growth
This study performs an in situ TEM investigation of Li6.25Ga0.25La3Zr2O12 (Ga-LLZO) growth during a high-temperature calcination process. At 750 °C, an intermediate phase, La2Zr2O7 (LZO), is formed through epitaxial growth along the crystallographic orientations of (1¯11)LZO//(1¯11)ZrO2 and [211]LZO//[101]ZrO2. The incorporation of Li and Ga into LZO is found to occur at 900 °C. The LZO transforms into Ga-LLZO via a layer-by-layer diffusion process that takes place along the [011¯] direction. The Ga doping can stabilize the cubic structure of Ga-LLZO at a temperature of 900 °C (while a temperatur...
Source: Nano Energy - February 19, 2020 Category: Nanotechnology Source Type: research

Electromagnetic induction derived micro-electric potential in metal-semiconductor core-shell hybrid nanostructure enhancing charge separation for high performance photocatalysis
In this study, the electromagnetic induction derived micro-electric potential in metal-semiconductor core-shell hybrid nanostructure was used to enhance charge separation in the shell semiconductor photocatalysts. The efficiency of photocatalytic hydrogen production can be improved around 110% by utilizing a core-shell nanostructure with a permanent magnet that moves under the normal photocatalytic reactor device. This electromagnetic induction derived electric field via the metal-semiconductor core-shell structure shows efficient conversions from relative motion to electric potential that provide a new opportunity to enha...
Source: Nano Energy - February 19, 2020 Category: Nanotechnology Source Type: research

Scalable, Safe, High-Rate Supercapacitor Separators Based on the Al2O3 Nanowire Poly(VinylButyral) Nonwoven Membrane
Publication date: Available online 19 February 2020Source: Nano EnergyAuthor(s): Mengting Liu, Kostiantyn Turcheniuk, Wenbin Fu, Yang Yang, Michael Liu, Gleb YushinAbstractHigh-performance supercapacitor nonwoven separators based on polyvinyl butyral (PVB) with uniformly distributed Al2O3 nanowires (NW) fillers (up to 40 wt. %) have been developed using a low-cost casting (stir-pour-dry) technique utilized under ambient conditions for the first time. These novel nonwoven separators with highly porous network demonstrated tensile strength of>30 MPa, extremely high electrolyte absorption (>200 wt.%), low-to-no swelling...
Source: Nano Energy - February 19, 2020 Category: Nanotechnology Source Type: research

Ultrasonic-assisted ultrafast fabrication of polymer nanowires for high performance triboelectric nanogenerators
This study not only presents a novel ultrafast fabrication approach of polymer nanowires with aspect-ratio controllability and universal suitability, but also demonstrates the polymer nanowires’ application in mechanical energy harvesting of TENGs with enhanced performance.Graphical abstractA novel, ultrafast, ultrasonic-assisted fabrication technique of polymer nanowires has been developed for triboelectric nanogenerator. By controlling the ultrasonic times, the length and aspect-ratio of polymer nanowires on the surface of polymer can be tunable from 2 to 232. The assembly TENGs are capable of harvesting mechanical...
Source: Nano Energy - February 19, 2020 Category: Nanotechnology Source Type: research

Metal-free two-dimensional phosphorus carbide as an efficient electrocatalyst for hydrogen evolution reaction comparable to platinum
Publication date: May 2020Source: Nano Energy, Volume 71Author(s): Xiongyi Liang, Chi-Man Lawrence WuAbstractThe development of effective metal-free electrocatalytic for hydrogen evolution reaction (HER) to substitute precious Pt based catalyst has attracted massive research interests. Herein, we report a density functional theory (DFT) investigation on activation and optimization of a new metal-free two-dimensional (2D) material, namely, phosphorus carbide (β-PC) monolayer as efficient HER electrocatalysts by applying reasonable C-vacancies and strain. Our theoretical results show that the C-vacancies introduce in-ga...
Source: Nano Energy - February 19, 2020 Category: Nanotechnology Source Type: research

Genetic algorithm-driven discovery of unexpected thermal conductivity enhancement by disorder
Publication date: Available online 15 February 2020Source: Nano EnergyAuthor(s): Han Wei, Hua Bao, Xiulin RuanAbstractDiscovering exceptions has been a major route for advancing sciences but a challenging and risky process. Machine learning has shown effectiveness in high throughput search of materials and nanostructures, but using it to discover exceptions has been out of the norm. Here we demonstrate the use of genetic algorithm to discover unexpected thermal conductivity enhancement in disordered nanoporous graphene as compared to periodic nanoporous graphene. Recent studies have concluded that random pores in nanoporou...
Source: Nano Energy - February 19, 2020 Category: Nanotechnology Source Type: research

Selectivity roadmap for electrochemical CO2 reduction on copper-based alloy catalysts
In this study, a series of Cu-based single atom alloys (M@Cu) with multiple active sites are modelled to investigate their CRR selectivity trends by evaluating various adsorption configurations and energetics. The hydrogen (H) and oxygen (O) affinity of the secondary metals in the M@Cu model catalysts are found to be effective descriptors in determining CRR selectivity. The observed product grouping offers valid theoretical elucidation for available reports of CRR selectivity trends for Cu-based alloy catalysts. It also provides further mechanistic insight into the CRR product selectivity for an extensive range of Cu-based...
Source: Nano Energy - February 19, 2020 Category: Nanotechnology Source Type: research

Dual output from unitary input for a hybrid coaxial triboelectric nanogenerator inspired by a crank engine
Publication date: May 2020Source: Nano Energy, Volume 71Author(s): Dongwoo Lee, Daewon KimAbstractEnergy conversion cannot be sufficiently achieved from a single output device having a single input. Energy conversion efficiency and output power of triboelectric nanogenerator (TENG) can be enhanced by increasing the contact area or the number of devices. Especially, combining two or more of the four operational mode (contact-separation, lateral sliding, single electrode, freestanding) of triboelectric nanogenerator would be more efficient to harvest mechanical energy than with singleharvesting mode. In this paper, a hybrid ...
Source: Nano Energy - February 19, 2020 Category: Nanotechnology Source Type: research

Revealing the Origin of the Beneficial Effect of Cesium in Highly Efficient Cu(In,Ga)Se 2 Solar Cells
Publication date: Available online 17 February 2020Source: Nano EnergyAuthor(s): Philipp Schöppe, Sven Schönherr, Manjusha Chugh, Hossein Mirhosseini, Philip Jackson, Roland Wuerz, Maurizio Ritzer, Andreas Johannes, Gema Martínez-Criado, Wolfgang Wisniewski, Torsten Schwarz, Christian T. Plass, Martin Hafermann, Thomas D. Kühne, Claudia S. Schnohr, Carsten RonningAbstractThe record conversion efficiency of thin-film solar cells based on Cu(In,Ga)Se2 (CIGS) absorbers has exceeded 23 %. Such a high performance is currently only attainable by the incorporation of heavy alkali metals like Cs into the abso...
Source: Nano Energy - February 18, 2020 Category: Nanotechnology Source Type: research

Boosting Alkaline Hydrogen Evolution and Zn-H2O Cell Induced by Interfacial Electron Transfer
Publication date: Available online 17 February 2020Source: Nano EnergyAuthor(s): Fanpeng Cheng, Lin Wang, Hanqing Wang, Chaojun Lei, Bin Yang, Zhongjian Li, Qinghua Zhang, Lecheng Lei, Shaobin Wang, Yang HouAbstractDirectly use of metal-organic frameworks (MOFs) as electrocatalysts by taking the intrinsic advantages of MOFs architecture for water splitting have attracted tremendous interest. Herein, we reported a vapor-phase transformation method to construct well-aligned nickel based MOFs (Ni-MOF) nanoarrays grown on electrochemical exfoliated graphite (EG) foil and further phosphorization treatment to derive a Ni-MOF/Ni2...
Source: Nano Energy - February 18, 2020 Category: Nanotechnology Source Type: research

Simple Route to Interconnected, Hierarchically Structured, Porous Zn2SnO4 Nanospheres as Electron Transport Layer for Efficient Perovskite Solar Cells
Publication date: Available online 15 February 2020Source: Nano EnergyAuthor(s): Meng Zhang, Xun Cui, Yufen Wang, Bing Wang, Meidan Ye, Wenlong Wang, Chunyuan Ma, Zhiqun LinAbstractConstructing electron transport layer (ETL) with higher carrier mobility and suitable bandgap is of key importance as it greatly influences the photovoltaic performance of perovskite solar cells (PSCs). Zn2SnO4 (ZTO) carries a high electron mobility of 10–30 cm2 V-1 s-1, an order of magnitude over the widely used TiO2 ETL in perovskite solar cells (PSCs), rendering it an excellent alternative to TiO2 ETL. Herein, we report a simple yet rob...
Source: Nano Energy - February 15, 2020 Category: Nanotechnology Source Type: research

An Ultra-long Life, High-performance, Flexible Li-CO2 Battery Based on Multifunctional Carbon Electrocatalysts
In this study, a rechargeable quasi-solidus flexible Li-CO2 battery was designed and fabricated using highly active N,S-doped carbon nanotubes (N,S-doped CNTs) as the cathode catalyst, and a smart polymer gel as the flexible electrolyte. This newly-developed flexible Li-CO2 battery exhibited a capacity as high as 23560 mAh g-1 based on the catalyst mass and an ultra-long lifetime of up to 538 cycles with excellent mechanical flexibility. This work provides a platform for the design and development of high-performance flexible Li-CO2 batteries from low-cost, earth-abundant, carbon-based multifunctional cathode catalysts.Gra...
Source: Nano Energy - February 15, 2020 Category: Nanotechnology Source Type: research

Asymmetric Ionic Aerogel of Biologic Nanofibrils for Harvesting Electricity from Moisture
Publication date: Available online 14 February 2020Source: Nano EnergyAuthor(s): Weiqing Yang, Xiankai Li, Xiao Han, Weihua Zhang, Zengbin Wang, Xiaomei Ma, Mingjie Li, Chaoxu LiAbstractArtificial asymmetric ionic membranes have attracted great interests in harvesting electricity from ubiquitous water activities, while mostly based on delicately-designed nanopores/nanochannels, either to harness saline water in mimic of cytomembranes or to harness moisture with carbon nanomaterials. Herein, fully biological asymmetric ionic aerogels were fabricated from biological oppositely-charged nanofibrils through a facile freeze-cast...
Source: Nano Energy - February 15, 2020 Category: Nanotechnology Source Type: research

Thin solid electrolyte interface on chemically bonded Sb2Te3/CNT composite anodes for high performance sodium ion full cells
Publication date: Available online 14 February 2020Source: Nano EnergyAuthor(s): Muhammad Ihsan-Ul-Haq, He Huang, Junxiong Wu, Jiang Cui, Shanshan Yao, Woon Gie Chong, Baoling Huang, Jang-Kyo KimAbstractNanostructured metal chalcogenides (MCs) and their composites are studied for high performance sodium-ion batteries (SIBs). Herein, we report the assembly of an emerging MC, Sb2Te3, with functionalized carbon nanotubes (CNTs) to form composite anodes. The role of oxygenated functional groups on CNTs in fostering the chemical interactions with Sb2Te3 for enhanced structural integrity of electrodes is elucidated by density fu...
Source: Nano Energy - February 15, 2020 Category: Nanotechnology Source Type: research

Lead-free relaxor thin films with huge energy density and low loss for high temperature applications
We report record energy storage density (>80 J cm−3) in Pb-free relaxor ferroelectrics based on Mn-doped BiFeO3–BaTiO3 thin films. Rapid interval deposition was used to impose layer-by-layer growth improving crystallinity and lowering unwanted defects concentration. The growth and Mn doping produced an order of magnitude lower leakage, with strongly reduced dielectric loss (from room temperature to>300 °C, and 100 Hz to 1 MHz), e.g. by a factor of 5 at 225 °C and 25 kHz. At room temperature (RT), the dielectric breakdown strength increased by a factor of 1.5...
Source: Nano Energy - February 15, 2020 Category: Nanotechnology Source Type: research

Largely enhanced electrostatic generator based on a bipolar electret charged by patterned contact micro-discharge and optimized substrates
Publication date: Available online 12 February 2020Source: Nano EnergyAuthor(s): Zibo Wu, Mingzhao Bi, Zeyuan Cao, Shiwen Wang, Xiongying YeAbstractWith the rapid development of wearable electronic devices and internet of things, harvesting mechanical energy from the surroundings to generate electric power has attracted intensive interests. Here, we demonstrate a rotary electrostatic generator based on a patterned positive and negative charged electret and optimal substrates of the electrode and electret. The bipolar charged electret is prepared using the patterned contact micro-discharge method with a pair of patterned el...
Source: Nano Energy - February 13, 2020 Category: Nanotechnology Source Type: research

Optimizing energy harvesting performance of cone dielectric elastomer generator based on VHB elastomer
In this study, a cone DEG based on VHB elastomer was developed and its energy harvesting performance was optimized by combining equibiaxial prestretching to cone stretching mode and then tailoring the variables such as the equibiaxial prestretch ratio, input bias voltage and cone displacement. The coupling relationship among these variables and their combined influences on generated energy, energy density and conversion efficiency were systematically studied for the first time. The results indicate that prestretching plays an important role in achieving the target energy harvesting performance at shorter displacement and l...
Source: Nano Energy - February 13, 2020 Category: Nanotechnology Source Type: research

A zinc battery with ultra-flat discharge plateau through phase transition mechanism
Publication date: Available online 13 February 2020Source: Nano EnergyAuthor(s): Donghong Wang, Yuwei Zhao, Guojin Liang, Funian Mo, Hongfei Li, Zhaodong Huang, Xinliang Li, Tiancheng Tang, Binbin Dong, Chunyi ZhiABSTRACTRechargeable aqueous zinc batteries have attracted enormous attention due to the distinctively economic and environmental advantages. However, the present zinc batteries delivered sloping voltage profiles based on the dominant mechanism of Zn ion intercalation. Typically, a Zn-V2O5 battery exhibits a discharge slope of ∼4.3 V/(Ah g‒1) and a slope of ∼1.5 V/(Ah g‒1) is observed for MnO2 cathodes...
Source: Nano Energy - February 13, 2020 Category: Nanotechnology Source Type: research

A Novel Cross-linked Nanocomposite Solid-state Electrolyte with Super Flexibility and Performance for Lithium Metal Battery
Publication date: Available online 13 February 2020Source: Nano EnergyAuthor(s): Shun Tang, Qian Lan, Lin Xu, Jiyuan Liang, Ping Lou, Cui Liu, Liqiang Mai, Yuan-Cheng Cao, Shijie ChengAbstractSolid-state electrolyte batteries are considered as one of the promising next generation power sources. A novel cross-linked nanocomposite polymer electrolyte (CNPE) based on poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide) triblock main chains and surface-modified SiO2 nanoparticles are prepared to establish a super flexible and stable polymer framework. The CNPE exhibits high ionic conductivity of 1.32 mS cm-1 at amb...
Source: Nano Energy - February 13, 2020 Category: Nanotechnology Source Type: research

Lead-free Monocrystalline Perovskite Resistive Switching Device for Temporal Information Processing
Publication date: Available online 13 February 2020Source: Nano EnergyAuthor(s): Jing-Yu Mao, Zhi Zheng, Zi-Yu Xiong, Pu Huang, Guang-Long Ding, Ruopeng Wang, Zhan-Peng Wang, Jia-Qin Yang, Ye Zhou, Tianyou Zhai, Su-Ting HanAbstractLead-free halide perovskites are emerging as promising candidate for practical application of optoelectronic devices due to their nontoxicity. Unfortunately, previously-reported lead-free halide perovskites-based resistive switching devices suffer from high leakage and operating current stemmed from the intrinsic nature of polycrystalline film with a great amount of grain boundaries and pin-holes...
Source: Nano Energy - February 13, 2020 Category: Nanotechnology Source Type: research

Large-scale Fabrication of Robust Textile Triboelectric Nanogenerators
In this study, a textile-based triboelectric nanogenerator (t-TENG) is proposed through a facile and universal fabrication process. Liquid-metal/polymer core/shell fibers (LCFs) structure as the basic unit of TENG textiles, can be extensively achieved by pumping liquid metal into uniform ultrafine polymer hollow fibers, which contribute to the large-scale industrialized production of TENG textiles. In addition to gaining a high output, the t-TENG demonstrates excellent acid and alkali resistance, and high friction durability. Furthermore, profiting from the universal fabrication process, the polymer hollow fibers can be re...
Source: Nano Energy - February 13, 2020 Category: Nanotechnology Source Type: research

Atomically dispersed hierarchically ordered porous Fe–N–C electrocatalyst for high performance electrocatalytic oxygen reduction in Zn-Air battery
Publication date: May 2020Source: Nano Energy, Volume 71Author(s): Xibo Zhang, Xiao Han, Zhe Jiang, Jie Xu, Luning Chen, Yakun Xue, Anmin Nie, Zhaoxiong Xie, Qin Kuang, Lansun ZhengAbstractRational design and synthesis of non-precious metal electrocatalysts for highly efficient oxygen reduction reaction (ORR) is urgently required. Recently, single atom catalysts (SACs) have sparked intense interests due to their maximum atom utilization efficiency and excellent properties in electrocatalysis. Herein, we reported an efficient ORR electrocatalyst with atomically dispersed FeN4 sites anchored on 3D hierarchically ordered micr...
Source: Nano Energy - February 13, 2020 Category: Nanotechnology Source Type: research

Anisotropic nanogenerator for anticounterfeiting and information encrypted transmission
Publication date: May 2020Source: Nano Energy, Volume 71Author(s): Xiao-Xiong Wang, Ning Wang, Huijing Qiu, Weizhi Song, Qi Liu, Zhiyong Fan, Miao Yu, Seeram Ramakrishna, Yun-Ze LongAbstractNanogenerators can provide power for independent small systems, so they have great flexibility. Among them, triboelectric nanogenerator (TENG) has gained wide attention due to its high output energy density. However, traditional TENGs don't show variation of output signal when the relative direction of the friction layers changes. Through electrospinning aligned polymer nanofibers, we obtained anisotropic TENG (A-TENG), which has better...
Source: Nano Energy - February 13, 2020 Category: Nanotechnology Source Type: research

The effects of vanadium substitution on one-dimensional tunnel structures of cryptomelane: Combined TEM and DFT study
Publication date: Available online 4 February 2020Source: Nano EnergyAuthor(s): Shi-Ze Yang, Killian R. Tallman, Ping Liu, Diana M. Lutz, Bingjie Zhang, Sung Joo Kim, Lijun Wu, Amy C. Marschilok, Esther S. Takeuchi, Kenneth J. Takeuchi, Yimei ZhuAbstractRational design of energy storage materials requires mechanistic understanding which relies on atomic scale characterization of structure and defects. Here we utilize vanadium (V)-substituted one-dimensional cryptomelane as a model material to study structural features critical to electrochemical reversibility of the cathode in lithium-ion batteries. We found the substituti...
Source: Nano Energy - February 10, 2020 Category: Nanotechnology Source Type: research

Magneto-responsive thermal switch for remote-controlled locomotion and heat transfer based on magnetic nanofluid
Publication date: Available online 6 February 2020Source: Nano EnergyAuthor(s): Lei Shi, Yanwei Hu, Yurong HeAbstractHeat transfer and thermal management has garnered widespread attention due to its industrial applications, particularly for thermal and electronics devices. Therefore, new thermal management solutions are urgently required to maintain optimum temperature and efficiency of the systems. Herein, Fe3O4 magnetic nanofluid was prepared to establish the quick heat conduction channel between heat source and heat sink relying on the high thermal conductivity. And a magneto-responsive remote-controlled heat transfer m...
Source: Nano Energy - February 10, 2020 Category: Nanotechnology Source Type: research

Highly uniform InGaAs/InP Quantum Well Nanowire Array-based Light Emitting Diodes
Publication date: Available online 6 February 2020Source: Nano EnergyAuthor(s): Inseok Yang, Sejeong Kim, Marika Niihori, Ahmed Alabadla, Ziyuan Li, Li Li, Mark N. Lockrey, Duk-Yong Choi, Igor Aharonovich, Jennifer Wong-Leung, Hark Hoe Tan, Chennupati Jagadish, Lan FuAbstractIII-V semiconductor nanowire infrared light emitting diodes (LEDs) have great potential for the development of Si-based integrated photonics. In this paper, we report the growth of highly uniform triangular prism InGaAs/InP single quantum well (QW) nanowires using a 2-step growth by metal organic chemical vapor deposition by selective area epitaxy tech...
Source: Nano Energy - February 10, 2020 Category: Nanotechnology Source Type: research

Biometric-Based Tactile Chemomechanical Transduction: An Adaptable Strategy for Portable Bioassay
Publication date: Available online 6 February 2020Source: Nano EnergyAuthor(s): Ruijin Zeng, Jiangming Tao, Dianping Tang, Dietmar Knopp, Jian Shu, Xia CaoABSTRACTPressure-based portable bioassays incorporating biomolecular-recognition with gas-generation have been widely developed, but most involve low-sensitivity and are therefore unsuitable for routine use. Herein, a tactile chemomechanical transduction strategy based on sponge electrode-modified barium titanate-polypyrrole-reduced graphene oxide (BTO-PPy-rGO, piezoelectric and piezoresistive composite nanomaterial) was designed for point-of-care immunoassay/aptasensor ...
Source: Nano Energy - February 10, 2020 Category: Nanotechnology Source Type: research

Elastic inhomogeneity and anomalous thermal transport in ultrafine Si phononic crystals
Publication date: Available online 6 February 2020Source: Nano EnergyAuthor(s): Kouhei Takahashi, Masaki Fujikane, Yuxuan Liao, Makoto Kashiwagi, Takashi Kawasaki, Naoki Tambo, Shenghong Ju, Yasuyuki Naito, Junichiro ShiomiAbstractControlling nanoscale thermal transport via phonon engineering is a promising path for novel thermal management in electronic devices and high performance thermoelectrics. Here we report that ultrafine nanofabrication allows us to change the lattice vibrational properties such that reduces the material thermal conductivity in an unusual manner. This is demonstrated in ultrafine silicon (Si) phono...
Source: Nano Energy - February 10, 2020 Category: Nanotechnology Source Type: research

Multi-field-coupling energy conversion for flexible manipulation of graphene-based soft robots
Publication date: Available online 6 February 2020Source: Nano EnergyAuthor(s): Bing Han, Yuan-Yuan Gao, Yong-Lai Zhang, Yu-Qing Liu, Zhuo-Chen Ma, Qi Guo, Lin Zhu, Qi-Dai Chen, Hong-Bo SunAbstractSoft robots enabling controllable movement in a predicable manner have attracted enormous research interests. However, current researches on soft robots are mainly limited to single actuation mode, and thus complex and multidimensional motility is significantly limited. Here, we propose and demonstrate for the first time a multi-field-coupling energy conversion strategy for flexible manipulation of soft robots, by which 3D-positi...
Source: Nano Energy - February 10, 2020 Category: Nanotechnology Source Type: research

Generalized Preparation of Au NP @ Ni(OH)2 Yolk-Shell NPs and Their Enhanced Catalytic Activity
Publication date: Available online 7 February 2020Source: Nano EnergyAuthor(s): Ren Cai, Haiyan Jin, Dan Yang, Keng-Te Lin, Kitying Chan, Jianke Sun, Zhuo Chen, Xiaobing Zhang, Weihong TanABSTRACTYolk-shell nanostructures have attracted considerable attention because of their unique properties and promising applications. Yet, synthesis of well-defined yolk-shell structures with controllable composition remains a major challenge. Here, we report a general method to fabricate Au NP @ Ni(OH)2 yolk-shell NPs. Au cores with various diameters and shapes can be successfully encapsulated into the Ni(OH)2 shells by a similar approa...
Source: Nano Energy - February 10, 2020 Category: Nanotechnology Source Type: research

Corrigendum to “Flow-induced snap-through triboelectric nanogenerator” [Nano Energy, 68 (2020) 104379]
Publication date: April 2020Source: Nano Energy, Volume 70Author(s): Hyeonseong Kim, Qitao Zhou, Daegyoum Kim, Il-Kwon Oh (Source: Nano Energy)
Source: Nano Energy - February 9, 2020 Category: Nanotechnology Source Type: research

Universal Biomechanical Energy Harvesting from Joint Movements Using a Direction-Switchable Triboelectric Nanogenerator
In this study, we firstly propose a novel type of the direction-switchable triboelectric nanogenerator, called a STRING, which incorporates an appropriate power transmission unit and the rotational triboelectric nanogenerator. A flexible string plays the critical role in universally transferring power regardless of direction and displacement of the applied force. It is shown that the impulse as well as the speed of the human body movement are the key parameters determining the output performance of the STRING. The lightweight STRING (total weight less than 160 g) is applied to more than 5 joints and the ability to easily g...
Source: Nano Energy - February 9, 2020 Category: Nanotechnology Source Type: research

Strong synergy in a lichen-like RuCu nanosheet boosts the direct methane oxidation to methanol
Publication date: Available online 8 February 2020Source: Nano EnergyAuthor(s): Shuxing Bai, Qing Yao, Yong Xu, Kailei Cao, Xiaoqing HuangAbstractThe direct methane (CH4) conversion (DMC) to methanol (CH3OH) has been attracting great attention, however it remains a huge challenge to achieve this process because of the dilemmas in CH4 selective activation. We here report that the lichen-like RuCu nanosheets (RuxCu1-x NLs) can serve as high-efficiency catalysts to catalyze DMC to produce oxygenates (CH3OH and methylhydroperoxide (CH3OOH)) under mild conditions in the presence of oxygen (O2) and trace amount of hydrogen perox...
Source: Nano Energy - February 9, 2020 Category: Nanotechnology Source Type: research

Rational design of porous nitrogen-doped Ti3C2 MXene as a multifunctional electrocatalyst for Li–S chemistry
Publication date: April 2020Source: Nano Energy, Volume 70Author(s): Yingze Song, Zhongti Sun, Zhaodi Fan, Wenlong Cai, Yuanlong Shao, Guan Sheng, Menglei Wang, Lixian Song, Zhongfan Liu, Qiang Zhang, Jingyu SunAbstractThe detrimental shuttle effect and retarded sulfur reaction kinetics in lithium–sulfur (Li–S) chemistry mainly lead to inferior electrochemical performances, posing a fatal threat to the practical application of Li–S batteries. Herein, porous N-doped Ti3C2 MXene (P-NTC) has been realized by a scalable sacrificial templating route, resulting in the rational design of active electrocatalyst f...
Source: Nano Energy - February 9, 2020 Category: Nanotechnology Source Type: research

Corrigendum to “High throughput of clean water excluding ions, organic media, and bacteria from defect-abundant graphene aerogel under sunlight” [Nano Energy 46 (2018) 415–422]
Publication date: April 2020Source: Nano Energy, Volume 70Author(s): Panpan Zhang, Qihua Liao, Teng Zhang, Huhu Cheng, Yaxin Huang, Ce Yang, Chun Li, Lan Jiang, Liangti Qu (Source: Nano Energy)
Source: Nano Energy - February 9, 2020 Category: Nanotechnology Source Type: research

Efficiency improvement of flexible Sb2Se3 solar cells with non-toxic buffer layer via interface engineering
In conclusion, optimized two-step treatment offers a simple and effective way to improve PCE and replacement of toxic CdS with In2S3 demonstrates new device design options towards flexible and non-toxic Sb2Se3 solar cells.Graphical abstract (Source: Nano Energy)
Source: Nano Energy - February 7, 2020 Category: Nanotechnology Source Type: research

Shallow Defects Levels and Extract Detrapped Charges to Stabilize Highly Efficient and Hysteresis-Free Perovskite Photovoltaic Devices
Publication date: Available online 7 February 2020Source: Nano EnergyAuthor(s): Xixia Liu, Yuanhang Cheng, Baoshan Tang, Zhi Gen Yu, Mengsha Li, Fen Lin, Siwen Zhang, Yong-Wei Zhang, Jianyong Ouyang, Hao GongAbstractPerovskite materials are promising candidates for efficient optoelectronic applications. However, the highly ionic nature of perovskite crystals would induce the defects formation within perovskite during device operation, which is detrimental to the device performance and long-term stability. Herein, a strategy to decrease the defects levels and prompt the extraction of detrapped chargers in perovskite films i...
Source: Nano Energy - February 7, 2020 Category: Nanotechnology Source Type: research

Opportunities for enhanced omnidirectional broadband absorption of the solar radiation using deep subwavelength structures
Publication date: April 2020Source: Nano Energy, Volume 70Author(s): Ashish Prajapati, Jordi Llobet, Mariana Antunes, Sofia Martins, Helder Fonseca, Carlos Calaza, João Gaspar, Gil ShalevAbstractOmnidirectional absorption is important to non-tracking systems designed for the harvesting of solar energy. Presently, we examine both experimentally and numerically the broadband absorption under oblique illumination driven by deep sidewall subwavelength structures (DSSS) in silicon nanopillar arrays (DSSS arrays). Specifically, we target DSSS geometries that are a built-in side effect of the top-down cyclic Bosch dry etch...
Source: Nano Energy - February 7, 2020 Category: Nanotechnology Source Type: research

Ultra-stretchable triboelectric nanogenerator as high-sensitive and self-powered electronic skins for energy harvesting and tactile sensing
Publication date: April 2020Source: Nano Energy, Volume 70Author(s): Kangkang Zhou, Yi Zhao, Xiupeng Sun, Zuqing Yuan, Guoqiang Zheng, Kun Dai, Liwei Mi, Caofeng Pan, Chuntai Liu, Changyu ShenAbstractRapid development of wearable electronic devices stimulates various requirements for power supply devices, such as sustainability, maintenance-free and stretchability. Herein, we fabricate a flexible and self-powered electronic skin (e-skin) based on an ultra-stretchable triboelectric nanogenerator (STENG) by multilayered thermoplastic polyurethane (TPU)/silver nanowires (AgNWs)/reduced graphene oxide (rGO). Due to the ultra-s...
Source: Nano Energy - February 7, 2020 Category: Nanotechnology Source Type: research

Unravelling processing issues of nanowire-based solar cell arrays by use of electron beam induced current measurements
Publication date: Available online 5 February 2020Source: Nano EnergyAuthor(s): Enrique Barrigón, Yuwei Zhang, Lukas Hrachowina, Gaute Otnes, Magnus BorgströmAbstractIII-V vertical nanowire arrays have great potential for next generation photovoltaics. Development towards high performing nanowire solar cells, which consist of a parallel connection of millions of single nanowire solar cells, requires a fast characterization technique that establishes a link between device performance and device processing. In this work, we use electron beam induced current measurements to characterize fully processed InP nanowir...
Source: Nano Energy - February 7, 2020 Category: Nanotechnology Source Type: research