Investigation of SiOx anode fading mechanism with limited capacity cycling
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Chinese Academy of Inspection and Quarantine (CAIQ), Beijing (China)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Chinese Academy of Inspection and Quarantine (CAIQ), Beijing (China)
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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- National Key R and D Program of China; USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1856502
- Alternate ID(s):
- OSTI ID: 1839780
- Journal Information:
- APL Materials, Journal Name: APL Materials Journal Issue: 1 Vol. 10; ISSN 2166-532X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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