具有增强锂离子电池性能的中国绣球花状CoS@MoS复合材料。

Chinese hydrangea lantern-like CoS@MoS composites with enhanced lithium-ion battery properties.

作者信息

Yang Kai, Mei Tao, Chen Zihe, Xiong Man, Wang Xuhui, Wang Jianying, Li Jinhua, Yu Li, Qian Jingwen, Wang Xianbao

机构信息

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, PR China.

出版信息

Nanoscale. 2020 Feb 7;12(5):3435-3442. doi: 10.1039/c9nr09260a. Epub 2020 Jan 28.

DOI:10.1039/c9nr09260a

PMID:31989998

Abstract

Chinese hydrangea lantern-like CoS@MoS composites are prepared by a facile solvothermal method. Ultra-thin MoS nanosheets as the shells grow tightly and uniformly on the surface of the CoS core. Due to their unique hierarchical core-shell structure and novel morphology, the composites show excellent electrochemical performance as the anode materials of lithium-ion batteries. They can deliver reversible discharge capacities of around 1298, 1150, 1089, 1018 and 941 mA h g at the current densities of 0.1, 0.5, 1, 1.5 and 2.0 A g, respectively. Moreover, the CoS@MoS composites can still maintain a discharge capacity of 1048 mA h g after 300 cycles at a current density of 1.0 A g.

摘要

通过简便的溶剂热法制备了具有灯笼状的中国绣球花状CoS@MoS复合材料。超薄的MoS纳米片作为壳层紧密且均匀地生长在CoS核的表面。由于其独特的分级核壳结构和新颖的形态，该复合材料作为锂离子电池的负极材料表现出优异的电化学性能。在电流密度分别为0.1、0.5、1、1.5和2.0 A g时，它们的可逆放电容量分别约为1298、1150、1089、1018和941 mA h g。此外，在1.0 A g的电流密度下循环300次后，CoS@MoS复合材料仍能保持1048 mA h g的放电容量。