期刊
ACS OMEGA
卷 5, 期 40, 页码 26015-26022出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.0c03453
关键词
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资金
- National Research Foundation of Korea (NRF) - Korea Government (MSIT) [2020R1A2C2010191]
- Institutional Research Program of the KIST [2E30202]
- Technology Development Program to Solve Climate Changes of the Korean National Research Foundation (NRF) [2017M1A2A2044482]
- National Research Foundation of Korea [2020R1A2C2010191, 2017M1A2A2044482] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Sulfide solid electrolytes (SEs) with high Li-ion conductivities (sigma(ion)) and soft mechanical properties have limited applications in wet casting processes for commercial all-solid-state batteries (ASSBs) because of their inherent atmospheric and chemical instabilities. In this study, we fabricated sulfide SEs with a novel core-shell structure via environmental mechanical alloying, while providing sufficient control of the partial pressure of oxygen. This powder possesses notable atmospheric stability and chemical resistance because it is covered with a stable oxysulfide nanolayer that prevents deterioration of the bulk region. The core-shell SEs showed a sigma(ion) of more than 2.50 mS cm(-1) after air exposure (for 30 min) and reaction with slurry chemicals (mixing and drying for 31 min), which was approximately 82.8% of the initial sigma(ion). The ASSB cell fabricated through wet casting provided an initial discharge capacity of 125.6 mAh g(-1). The core-shell SEs thus exhibited improved powder stability and reliability in the presence of chemicals used in various wet casting processes for commercial ASSBs.
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