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Functionalized Sulfide Solid Electrolyte with Air-Stable and Chemical-Resistant Oxysulfide Nanolayer for All-Solid-State Batteries.


ABSTRACT: Sulfide solid electrolytes (SEs) with high Li-ion conductivities (?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 ?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 ?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.

SUBMITTER: Jung WD 

PROVIDER: S-EPMC7558032 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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Functionalized Sulfide Solid Electrolyte with Air-Stable and Chemical-Resistant Oxysulfide Nanolayer for All-Solid-State Batteries.

Jung Wo Dum WD   Jeon Minjae M   Shin Sung Soo SS   Kim Ji-Su JS   Jung Hun-Gi HG   Kim Byung-Kook BK   Lee Jong-Heun JH   Chung Yong-Chae YC   Kim Hyoungchul H  

ACS omega 20201001 40


Sulfide solid electrolytes (SEs) with high Li-ion conductivities (σ<sub>ion</sub>) 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 atmosp  ...[more]

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