A novel strategy for synthesizing the large size Co9S8@C nanosheets as anode for lithium-ion batteries with superior performance
A novel strategy for synthesizing the large size Co9S8@C nanosheets as anode for lithium-ion batteries with superior performance
复制标题
DOI：
10.1016/j.jallcom.2021.162668
复制
发表时间：
2021-12-08
影响因子：
6.2
通讯作者：
Zhang, Zhidong
中科院分区：
文献类型：
--
作者：
Hua, An;Zhou, Wenyang;Zhang, Zhidong
硫化钴已成为锂离子电池应用的热点材料，其中具有纳米片状结构的Co9S8有望成为高能、高功率锂离子电池负极材料的候选材料。通过引入有机-无机杂化Co9S8-DETA(DETA=二乙三胺)为前驱体的新策略，通过焙烧工艺成功地制备了大尺寸Co9S8@C纳米片。由于Co9S8均匀的二维结构和非晶态碳层涂层，所制备的Co9S8@C纳米片作为负极材料具有良好的锂离子存储性能。0.2Ag(-1)循环160次后，可保持595mAhg(-1)的可逆容量。这种纳米复合材料的优异性能为其他硫化物作为锂离子电池的新负极提供了大量的机会。(C)2021年爱思唯尔B.V.保留所有权利。
The cobalt sulfides have become the focus materials on the lithium ion batteries application in which the Co9S8 with the nanosheet structure is the promising candidate for anode material in high-energy and highpower lithium ion batteries. By introducing a novel strategy with the organic-inorganic hybrid Co9S8-DETA (DETA=Diethylenetriamine) as the precursor, the large size Co9S8@C nanosheets have been successfully prepared via a calcination process. Due to uniform two-dimensional structure of Co9S8 and the amorphous carbon layer coating, the as-prepared Co9S8@C nanosheets exhibited excellent lithium ion storage performance as an anode material. The reversible capacity could be retained at 595 mAh g(-1) after 160 cycles at 0.2 A g(-1). The excellent performances of this nanocomposite offer numerous opportunities for other sulfides as a new anode in lithium ion batteries. (C) 2021 Elsevier B.V. All rights reserved.