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Preparation of Composite Electrodes for All-Solid-State Batteries Based on Sulfide Electrolytes: An Electrochemical Point of View

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Title: Preparation of Composite Electrodes for All-Solid-State Batteries Based on Sulfide Electrolytes: An Electrochemical Point of View
Authors: Giraldo, Sara Browse this author
Nakagawa, Koki Browse this author
Vasquez, Ferley A. Browse this author
Fujii, Yuta Browse this author
Wang, Yongming Browse this author
Miura, Akira Browse this author →KAKEN DB
Calderon, Jorge A. Browse this author
Rosero-Navarro, Nataly C. Browse this author
Tadanaga, Kiyoharu Browse this author →KAKEN DB
Keywords: all-solid-state batteries
sulfide solid electrolyte
solution process
electrochemical impedance analysis
Issue Date: Dec-2021
Publisher: MDPI
Journal Title: Batteries
Volume: 7
Issue: 4
Start Page: 77
Publisher DOI: 10.3390/batteries7040077
Abstract: All-solid-state batteries (ASSBs) are a promising response to the need for safety and high energy density of large-scale energy storage systems in challenging applications such as electric vehicles and grid integration. ASSBs based on sulfide solid electrolytes (SEs) have attracted much attention because of their high ionic conductivity and wide electrochemical windows of the sulfide SEs. Here, we study the electrochemical performance of ASSBs using composite electrodes prepared via two processes (simple mixture and solution processes) and varying the ionic conductor additive (80Li(2)S center dot 20P(2)S(5) and argyrodite-type Li6PS5Cl). The composite electrodes consist of lithium-silicate-coated LiNi1/3Mn1/3Co1/3O2 (NMC), a sulfide SE, and carbon additives. The charge-transfer resistance at the interface of the solid electrolyte and NMC is the main parameter related to the ASSB's status. This value decreases when the composite electrodes are prepared via a solution process. The lithium silicate coating and the use of a high-Li-ion additive conductor are also important to reduce the interfacial resistance and achieve high initial capacities (140 mAh g(-1)).
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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