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Fluorine‐Doped Antiperovskite Electrolyte for All‐Solid‐State Lithium‐Ion Batteries |
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| Authors: | Dr. Sen Xin Dr. Shuai Li Dr. Jinlong Zhu Dr. Xujie Lü Dr. Zhiming Cui Prof. Quanxi Jia Prof. Jianshi Zhou Prof. Yusheng Zhao Prof. John B. Goodenough |
| Affiliation: | 1. Materials research program and the Texas Materials Institute, University of Texas at Austin, Austin, TX, USA;2. School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, P.R. China;3. High Pressure Science and Engineering Center, University of Nevada, Las Vegas, NV, USA;4. Center for Integrated Nanotechnologies, Las Los Alamos National Laboratory, Los Alamos, NM, USA |
| Abstract: | 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. |
| Keywords: | all-solid-state battery antiperovskite lithium-ion battery solid electrolyte |