Functionalized Sulfide Solid Electrolyte with Air-Stable and Chemical-Resistant Oxysulfide Nanolayer for All-Solid-State Batteries
- Title
- Functionalized Sulfide Solid Electrolyte with Air-Stable and Chemical-Resistant Oxysulfide Nanolayer for All-Solid-State Batteries
- Author
- 정용재
- Keywords
- IONIC-CONDUCTIVITY; STABILITY; SELECTION; GLASSES
- Issue Date
- 2020-10
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS OMEGA, v. 5, no. 40, page. 26015-26022
- Abstract
- 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.
- URI
- https://pubs.acs.org/doi/10.1021/acsomega.0c03453https://repository.hanyang.ac.kr/handle/20.500.11754/171995
- ISSN
- 2470-1343
- DOI
- 10.1021/acsomega.0c03453
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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