文献类型：期刊文献

英文题名：Encapsulating ultrafine cobalt sulfides into multichannel carbon nanofibers for superior Li-ion energy storage

作者：Hou, Zhidong[1,2];Jiang, Mingwei[1,2];Cao, Yunjing[1,2];Liu, Huanyan[1,2];Zhang, Yu[3];Wang, Jian-Gan[1,2]

机构：[1]Northwestern Polytech Univ, Ctr Nano Energy Mat, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China;[2]NPU, Shaanxi Joint Lab Graphene, Xian 710072, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：541

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20222412209869);WOS:【SCI-EXPANDED(收录号:WOS:000823235400001)】；

基金：Acknowledgments The work was financially supported by the National Natural Science Foundation of China (51772249, 22109044, and 51821091) , Fundamental Research Funds for the Central Universities (3102019JC005 and D5000210894) . The authors thank the TEM anal-ysis from the Analytical & Testing Center of Northwestern Polytechnical University.

语种：英文

外文关键词：Cobalt sulfides; Multichannel carbon; Electrospinning; High-capacity anode; Li-ion batteries

摘要：Developing high-capacity anode materials based on metal sulfides is of great importance for building advanced lithium-ion batteries (LIBs). Herein, we demonstrate rational encapsulation of cobalt sulfide (CoSx) nanoparticles into multichannel carbon nanofibers (CoSx/MCF) with substantially improved Li+ reactivity and durability. The unique multichannel and conductive carbon scaffold not only affords boosted electron/Li + transportation pathways for fast redox reaction with CoSx, but also stabilizes the electrode structure by buffering the volume change of CoSx. Impressively, the CoSx/MCF composite could serve as flexible anodes to deliver a high reversible capacity of 737 mAh g+1 at 0.2 A g+1 after 100 cycles, superior rate capacity of 374 mAh g+1 at 5 A g+1, and excellent operating stability over 1000 cycles. Practical feasibility is also demonstrated by a full cell based on the high-capacity CoSx/MCF anode and Li[Ni0.8Co0.1Mn0.1]O2 cathode. The present study may provide insights for the facile synthesis of advanced anode materials for high-performance LIBs.