纳米片
阳极
材料科学
碳纤维
离子
纳米技术
化学工程
光电子学
电极
化学
复合材料
物理化学
有机化学
复合数
工程类
作者
Mingchen Shi,Qiang Wang,Junwei Hao,Huihua Min,Hairui You,Xiaomin Liu,Hui Yang
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2020-01-01
卷期号:49 (40): 14115-14122
被引量:21
摘要
Cobalt sulfide (Co4S3) is considered one of the most promising anode materials for lithium-ion batteries owing to its high specific capacity. However, some disadvantages, such as poor electrical conductivity and volume expansion, lead to low rate capability and may hinder its practical applications. Herein, we firstly fabricated leaf-like hollow Co4S3/C nanosheet arrays growing on carbon cloth (h-Co4S3/C NA@CC) by a facile solution method combined with carbonization, sulfidation and annealing treatments. The carbon coated leaf-like nanosheet structure can facilitate the electron transfer and shorten the ion transfer path, while the hollow space inside Co4S3 can buffer the volume variation. As the anode for LIBs, h-Co4S3/C NA@CC demonstrates an impressive rate capability (654.3 mA h g-1 at 1 A g-1 and 394.1 mA h g-1 at 2 A g-1), and an excellent cycling stability (720 mA h g-1 at 1 A g-1 after 200 cycles and 79% capacity retention at 2 A g-1 after 500 cycles).
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