Crack-free single-crystalline Ni-rich layered NCM cathode enable superior cycling performance of lithium-ion batteries

Publication date: Available online 7 January 2020Source: Nano EnergyAuthor(s): Xinming Fan, Guorong Hu, Bao Zhang, Xing Ou, Jiafeng Zhang, Wengao Zhao, Haiping Jia, Lianfeng Zou, Peng Li, Yong YangAbstractNi-rich layered oxides are extensively employed as a promising cathode material in lithium ion batteries (LIBs) due to their high energy density and reasonable cost. However, the hiearchical strcuture of secondary particles with grain boundaries inevitably induces the structural collapse and severe electrode/electrolyte interface parasitic reactions as the intergranular crack arises from the anisotropic shrink and expansion. Herein, the single-crystalline LiNi0.83Co0.11Mn0.06O2 (SC-NCM) with primary particles of 3-6 μm diameter is developed and comprehensively investigated, which exhibits superior cycling performance at both room temperature and elevated temperature (55 oC) as well as significantly improved structural integrity after long-term cycling. Remarkably, the SiO-C||SC-NCM pouch-type full cell with a practical loading (8.7mAh cm-2) delivers a capacity retention of 84.8 % at 45 oC after 600 cycles at a current rate of 1C (1C= 200 mA g-1), retaining a high specific energy density of 225 Wh/kg. Using a combination of X-ray photoelectron spectroscopy, time-of-flight secondary-ion mass spectrometry and scanning transmission electron microscopy, we reveal that SC-NCM particles with micron-sizes effectively mitigate the undesired electrode/electrolyte side interactions ...
Source: Nano Energy - Category: Nanotechnology Source Type: research

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AbstractCymothoidae, Leach, 1818 (Crustacea: Isopoda) are ectoparasites of marine, brackish and freshwater fishes that are reported to induce deleterious tissue impacts on the infested fish hosts. The present study aimed for the first-time screening ofMothocya melanosticta collected from the red sea fishNemipterus randalli in Egypt. Surveillance study was conducted for isopod infestation among the Red Sea fishN. randalli revealing a total infestation rate of 40.96% with the species identified asM. melanosticta. The parasite species was isolated from the branchial cavity and gills. Morphometric description was estimated usi...
Source: Journal of Parasitic Diseases - Category: Parasitology Source Type: research
​Paracentesis can be a quick and simple procedure with the right equipment and a well-rehearsed approach. It's important to practice this skill in the procedure lab and to familiarize yourself with the kit in your department a few times a year. This month, we focus on paracentesis set-up and basics, and next month we will review the nuts and bolts of completing the procedure.Important equipment for paracentesis: Five or six collection bottles, antiseptic prep, and a paracentesis kit. Consider longer needles for abdominal walls thicker than 2.5 cm.Grab the ultrasound and a pen. Position your patient at a 45-degree angle, ...
Source: The Procedural Pause - Category: Emergency Medicine Tags: Blog Posts Source Type: blogs
This study provides additional taxonomic features based on scanning electron microscopy (SEM) and molecular data for Paracamallanus cyathopharynx ( Baylis, 1923 ) (Nematoda: Camallanidae). Parasites were collected from the posterior end of the intestine of cultured freshwater Sharptooth catfish Clarias gariepinus (Burchell, 1822) from Kibos fish farm, Kisumu County, Kenya, from December 2017 to March 2018. Additional taxonomic features recorded for P. cyathopharynx include the occurrence of 4-5 equal length digitate processes on the caudal end of the female, 4 processes (2 smaller and 2 larger) on the male caudal end, and ...
Source: The Journal of Parasitology - Category: Parasitology Authors: Tags: J Parasitol Source Type: research
We describe adult males and females and a nymph belonging to Linguatula serrata in Australia, based on light and scanning electron microscopies. In addition, 18S and Cox1 sequence data have also been provided and were compared with similar sequences in GenBank. Our specimens had identical 18S sequences and limited genetic distance in Cox1 region which fell within the intra-specific range observed or Linguatula spp. suggesting that they all belong to one species. Phylogenetic analyse showed that Australian specimens were grouped with L. serrata I Europe where the species was first found and described. A number of L. serrata...
Source: International Journal for Parasitology: Parasites and Wildlife - Category: Parasitology Source Type: research
CONCLUSION: Anterior segment optical coherence tomography can complement biomicroscopy, allowing for a better characterization of corneal involvement at presentation that can help in staging and providing useful prognostic information. PMID: 31962057 [PubMed - as supplied by publisher]
Source: Acta Medica Portuguesa - Category: General Medicine Tags: Acta Med Port Source Type: research
AbstractTanqua tiara (von Linstow, 1879) Blanchard, 1904, recovered from the stomach of water monitor lizard,Varanus flavescens (Hardwicke and Gray, 1827), collected from the Dubrajpur town, Birbhum district of West Bengal, India, is redescribed with light as well as scanning electron microscopy. This species is characterised by presence of two large lateral pseudolabia followed by massive cephalic bulb. The inner surface of each pseudolabium is folded into five rounded tooth-like formations which fit into corresponding folds on adjacent pseudolabium. Spicules are equal and similar. Gubernaculum is absent. Caudal papillae ...
Source: Journal of Parasitic Diseases - Category: Parasitology Source Type: research
Abstract Striga is a parasitic weed that disperses easily, and its seeds can persist in the soil for many years, presenting long-term threats to food security. If SLs stimulate the seed germination of root parasitic weeds before planting, weeds will wither due to no host. Therefore, it is necessary to determine the mechanism of strigolactone (SL) signaling in Striga to reduce the impacts of this parasitic weed. Striga has eleven different kinds of HYPO-SENSITIVE to LIGHT (ShHTL) hydrolases. Different ShHTL hydrolases exhibit distinct responses to SLs, despite these ShHTLs exhibiting more than 60% sequence identity...
Source: Biochemical and Biophysical Research communications - Category: Biochemistry Authors: Tags: Biochem Biophys Res Commun Source Type: research
aes J Abstract Schistosomiasis is one of the most important parasitic infections in terms of its negative effects on public health and economics. Since praziquantel is currently the only drug available to treat schistosomiasis, there is an urgent need to identify new anthelmintic agents. Piplartine, also known as piperlongumine, is a biologically active alkaloid/amide from peppers that can be detected in high amounts in the roots of Piper tuberculatum. Previously, it has been shown to have in vitro schistosomicidal effects. However, its anthelmintic activity in an animal host has not been reported. In the present ...
Source: Acta Tropica - Category: Infectious Diseases Authors: Tags: Acta Trop Source Type: research
Publication date: Available online 17 January 2020Source: Molecular and Biochemical ParasitologyAuthor(s): Danielle E. Skinner, Anastas Popratiloff, Yousef N. Alrefaei, Victoria H. Mann, Gabriel Rinaldi, Paul J. BrindleyAbstractThe RNA helicase Vasa plays a pivotal role in the development of the germ line. To decipher the functional roles of vasa/PL10-like genes in the human blood fluke Schistosoma mansoni, we performed RNA interference followed by the analysis of the ovary in the adult female. Doubled stranded RNA targeting the schistosome vasa-like gene Smvlg1 reduced the volume of the ovary. Changes in morphology of the...
Source: Molecular and Biochemical Parasitology - Category: Parasitology Source Type: research
Epigenetic mechanisms such as DNA methylation and histone post-translational modifications are fundamental for the phenotypic plasticity of insects during their interaction with the environment. In response to environmental cues, the methylation pattern in DNA is dynamically remodeled to achieve an epigenetic control of gene expression. DNA methylation is the focus of study in insects for its evolutionarily conserved character; however, there is scant knowledge about the epigenetic regulation in vector mosquitoes, especially during their infection by parasites. The aim of the present study was to evaluate the participation...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
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