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Investigation of SiOx anode fading mechanism with limited capacity cycling

Authors :
Haiqing Xiao
Chen Fang
Tianyue Zheng
Hua Bai
Gao Liu
Source :
APL Materials, Vol 10, Iss 1, Pp 011108-011108-6 (2022)
Publication Year :
2022
Publisher :
AIP Publishing LLC, 2022.

Abstract

Silicon suboxide (SiOx) is one of the promising anode materials for the next-generation lithium-ion batteries. However, SiOx has a severe capacity fading problem during cycling. It is thus desired to investigate the detailed fading mechanisms of SiOx anode materials. In this study, limited capacity cycling was employed to examine the electrochemical behaviors of the SiOx anode, and the lithiation/delithiation cycling was limited within a range of 10% theoretical capacity. This strategy minimizes the volume variation of SiOx materials upon charging/discharging, which helps to reveal their decay factors other than volume fluctuation. It is demonstrated that the instability of the SiOx surface during cycling was likely a parallel factor of active material fading, which seems to cause unfavored electrode interface rearrangements with lowered electric conductivity.

Details

Language :
English
ISSN :
2166532X
Volume :
10
Issue :
1
Database :
Directory of Open Access Journals
Journal :
APL Materials
Publication Type :
Academic Journal
Accession number :
edsdoj.31b67839a784424c821a4b8474d15562
Document Type :
article
Full Text :
https://doi.org/10.1063/5.0077036