Hollow Co3S4/C anchored on nitrogen-doped carbon nanofibers as a free-standing anode for high-performance Li-ion batteries
Hollow Co3S4/C anchored on nitrogen-doped carbon nanofibers as a free-standing anode for high-performance Li-ion batteries
复制标题
锚定在氮掺杂碳纳米纤维上的空心 Co3S4/C 作为高性能锂离子电池的独立阳极
DOI：
10.1016/j.electacta.2018.12.175
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发表时间：
2019-03-10
影响因子：
6.6
通讯作者：
Luo, Shan
中科院分区：
文献类型：
--
作者：
Luo, Feng;Ma, Dingtao;Luo, Shan
硫化钴与碳材料的结合作为锂离子存储的一种有前途的阳极引起了人们极大的兴趣。本文采用静电纺丝法，通过碳化、硫化等工艺制备了均匀锚定在掺氮碳纳米纤维上的Co 3S 4/C中空纳米颗粒（简称Co 3S 4/CNF）。Co 3S 4/CNF自支撑复合材料可直接用作锂离子电池负极，在200 mA.g（-1）下循环200次后的可逆容量为742 mAh.g（-1），在1 A.g（-1）下循环500次后的可逆容量为436 mAh.g（-1）。Co 3S 4/CNF复合材料的这种上级储锂性能是由于复合材料结构的协同效应，有效地促进了电子和锂离子的扩散，抑制了体积变化，保持了结构的完整性。(C)2019爱思唯尔有限公司版权所有。
Cobalt sulfide coupled with carbon materials attracts tremendous interest as a promising anode for Li-ion storage. In this paper, hollow Co3S4/C nanoparticles (NPs) with a uniform size of 30 nm homogeneously anchored on nitrogen-doped carbon nanofibers (denoted as Co3S4/CNF) are prepared by electrospinning method, followed by carbonization and sulfuration process. The free-standing Co3S4/CNF composites are straightly acted as binder- and current collector-free anode for lithium-ion battery, which demonstrate a high reversible capacity of 742 mAh.g(-1) at 200 mA.g(-1) after 200 cycles and 436 mAh.g(-1) at 1 A.g(-1) after 500 cycles, respectively. Such superior lithium storage performance of the Co3S4/CNF composites can be ascribed to the synergetic effect of the composites structure, which can effectively facilitate the electron and lithium ion diffusion, restrain the volumetric variation and keep the structure intact. (C) 2019 Elsevier Ltd. All rights reserved.