Preparation of Si/C composite nanofibers by electrospinning method using as the lithium-ion battery anode

DOI

10.2991/meita-15.2015.134How to use a DOI?

Keywords

Lithium-ion battery anode; Si nanoparticles; Carbon coating; Electrospinning

Abstract

Si was a promising anode material for next-generation LIBs due to its extremely large capacity of 4200mAh/g-1 (Li4.4Si phase). However, during repeated lithium insertion/extraction processes, the accompanied huge volume change (400%) induced the structural failure of the active material and resulted in rapid capacity fading. To overcome this problem, Si/C composite nanofibers with porous structure were prepared through a facile electrospinning method. The inclusion of carbon not only worked as a stable electric conductive pathway but also buffered the volume expansion of silicon during the process of charging and discharging. The first discharge capacity of the composite nanofiber (26wt..% and 50wt.% Si) electrode reaches 1840 mAh/g 1, 2042mAh/g 1, and it delivered a charge capacity of 1461mAh/g 1, 1644mAh/g 1 at the first cycle, corresponding to an initial coulombic efficiency of 79% and 80%. In contrast, the cell with the pure Si nanoparticle exhibited an initial discharge/charge capacity of 18 and 13mAh/g 1, respectively, which was much lower than the composite nanofiber electrode.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yueqin Ban
AU  - Weiquan Shao
AU  - Shaou Chen
AU  - Lizhu He
AU  - Hailing Zhu
AU  - Jiajia Feng
AU  - Xiaojie Guo
AU  - Yanqiang Li
AU  - Haifeng Zhao
AU  - Yingnan Zhang
PY  - 2015/08
DA  - 2015/08
TI  - Preparation of Si/C composite nanofibers by electrospinning method using as the lithium-ion battery anode
BT  - Proceedings of the 2015 International Conference on Materials Engineering and Information Technology Applications
PB  - Atlantis Press
SP  - 739
EP  - 743
SN  - 2352-5401
UR  - https://doi.org/10.2991/meita-15.2015.134
DO  - 10.2991/meita-15.2015.134
ID  - Ban2015/08
ER  -