Interfacial reactions at electrode/electrolyte boundary in all solid-state lithium battery using inorganic solid electrolyte, thio-LISICON

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• 作者：Takeshi Kobayashi ; Atsuo Yamada ; Ryoji Kanno
• 关键词：Thio-LISICON ; All solid-state battery ; Solid electrolyte interface
• 刊名：Electrochimica Acta
• 出版年：2008
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：1 June 2008
• 卷：53
• 期：15
• 页码：5045-5050
• 文件大小：824 K

摘要

Electrode/electrolyte interface was studied for all solid-state batteries using inorganic solid electrolyte with the crystalline thio-LISICON and glassy Li–Si–P–S–O systems. The formation of the interfacial phase depends on the electrolyte. The thio-LISICON (Li_3.25Ge_0.25P_0.75S₄) and the Li–Al negative electrode provided the best electrode/electrolyte interface for fast charge–discharge characteristics, while the SEI phase formed at the Li–Al/Li₃PO₄–Li₂S–SiS₂ glass boundary caused high interfacial resistance. The formation of the SEI phase is general behavior at the electrode/electrolyte interface of solid-state batteries, and the fast electrochemical reaction is attained as a result of optimization of the electrode/electrolyte combination.