Synthesis of cobalt nanofibers @ nickel sulfide nanosheets hierarchical core-shell composites for anode materials of lithium ion batteries
Synthesis of cobalt nanofibers @ nickel sulfide nanosheets hierarchical core-shell composites for anode materials of lithium ion batteries
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DOI：
10.1016/j.electacta.2018.07.185
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发表时间：
2018-09-10
影响因子：
6.6
通讯作者：
Zhang, Kaichuang
中科院分区：
文献类型：
--
作者：
Chen, Xuefang;Huang, Ying;Zhang, Kaichuang
采用化学转化法制备了高比表面积（241.67m2/g）的钴纳米纤维@镍硫纳米片（Co@Ni3S2）复合材料。这种特殊的纳米结构为电池的体积变化提供了足够的空间，保证了电解液的有效渗透，增加了充放电过程中电解液与活性物质的接触面积。此外，高导电性的钴纳米纤维的存在为电子和锂离子的快速传输提供了可能。复合电极的可逆放电容量为531 mAh/g，循环稳定性良好。这一研究可能为设计具有新型结构的高性能储能器件的高性能电极材料提供了灵感。(c)2018爱思唯尔有限公司版权所有。
Cobalt nanofibers @ Ni3S2 nanosheets (Co@Ni3S2) composites with high surface area (241.67m(2)/g) were successfully synthesized via a chemical conversion route. The special nanostructure afforded sufficient space for the volume change, ensured efficient electrolyte penetration, increased contact area between electrolyte and active material during discharge-charge process. Moreover, the existence of the cobalt nanofibers with high conductivity provided a possibility for the rapid transportation of the electrons and lithium ions. The composite electrodes presented a reversible discharge capacity of 531 mAh/g with a good cyclic stability. This research perhaps inspired the designing of high performance electrode materials with a novel structure for high performance energy storage devices. (c) 2018 Elsevier Ltd. All rights reserved.