FeS/ZnS Nanoflower Composites as High Performance Anode Materials for Sodium Ion Batteries

Publication date: Available online 8 November 2019Source: Inorganic Chemistry CommunicationsAuthor(s): Dongli Xie, Shu Cai, Xiaohong Sun, Tianyi Hou, Kaier Shen, Rui Ling, Anran Fan, Ruizi Zhang, Song Jiang, Yishu LinAbstractThe electrochemical performance of composite materials can be effectively improved by regulating multiple components and designing well-defined microstructure. In this work, FeS/ZnS composites with different Fe/Zn ratios were prepared through a facile wet chemical method. The as-prepared sulfide composite with molar ratio Fe/Zn = 1 exhibits optimal nanoflower morphology and achieves a high specific capacity as sodium-ion battery anode with reversible capacity of 475.1 mA h g-1 after 50 cycles at a current density of 100 mA g-1. Moreover, even at a high current density of 2000 mA g-1, a stable capacity of 207.6 mA h g-1 can be obtained. The superior electrochemical performance can be attributed to the design of optimal nanoflower structure through the regulation of Fe/Zn ratio, and the nanostructure can efficiently buffer volume change during discharge-charge, shorten Na+ diffusion pathways, promote the electrode/electrolyte contact, and thus render the sulfide composite FeS/ZnS a promising anode material for advanced sodium-ion batteries.Graphical abstract
Source: Inorganic Chemistry Communications - Category: Chemistry Source Type: research