Fluorine-Doped Antiperovskite Electrolyte for All-Solid-State Lithium-Ion Batteries

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• 作者：Dr. Yutao Li ; Dr. Weidong Zhou ; Dr. Sen Xin ; Dr. Shuai Li ; Dr. Jinlong Zhu ; Dr. Xujie Lü ; Dr. Zhiming Cui ; Prof. Quanxi Jia ; Prof. Jianshi Zhou ; Prof. Yusheng Zhao and Prof. John B. Goodenough
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：August 16, 2016
• 年：2016
• 卷：55
• 期：34
• 页码：9965-9968
• 全文大小：2330K
• ISSN：1521-3773

文摘

A fluorine-doped antiperovskite Li-ion conductor Li₂(OH)X (X=Cl, Br) is shown to be a promising candidate for a solid electrolyte in an all-solid-state Li-ion rechargeable battery. Substitution of F⁻ for OH⁻ transforms orthorhombic Li₂OHCl to a room-temperature cubic phase, which shows electrochemical stability to 9 V versus Li⁺/Li and two orders of magnitude higher Li-ion conductivity than that of orthorhombic Li₂OHCl. An all-solid-state Li/LiFePO₄ with F-doped Li₂OHCl as the solid electrolyte showed good cyclability and a high coulombic efficiency over 40 charge/discharge cycles.