Mechanochemical synthesis of Li-argyrodite Li₆PS₅X (X = Cl, Br, I) as sulfur-based solid electrolytes for all solid state batteries application

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• 作者：Sylvain Boulineau ; Matthieu Courty ; Jean-Marie Tarascon ; Virginie Viallet
• 关键词：All solid state batteries ; Lithium battery ; Solid electrolytes ; Mechanical milling ; Argyrodite ; Ionic conductivity
• 刊名：Solid State Ionics
• 出版年：2012
• 出版时间：3 August, 2012
• 年：2012
• 卷：221
• 期：Complete
• 页码：1-5
• 全文大小：871 K

文摘

Highly ion-conductive Li₆PS₅m>Xm> (m>Xm> = Cl, Br, I) Li-argyrodites were prepared through a high©\energy ball milling. Electrical and electrochemical properties were investigated. Ball-milled compounds exhibit a high conductivity between 2 and 7 ¡Á 10^? 4 S/cm with an activation energy of 0.3-0.4 eV for conduction. These attractive properties were attributed to the spontaneous formation of crystallized Li-argyrodite during ball-milling. An optimization of milling time led to a conductivity of 1.33 ¡Á 10^? 3 S/cm for the Li₆PS₅Cl phase with an electrochemical stability up to 7 V vs. lithium. An all solid state LiCoO₂/Elec./In lithium ion battery using ball-milled Li₆PS₅Cl as electrolyte was successfully assembled, and its room temperature performance is reported.