Materials research program and the Texas Materials Institute, University of Texas at Austin, Austin, TX, 78712, USA.
School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P.R. China.
Angew Chem Int Ed Engl. 2016 Aug 16;55(34):9965-8. doi: 10.1002/anie.201604554. Epub 2016 Jun 30.
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 Li2 OHCl 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 Li2 OHCl. An all-solid-state Li/LiFePO4 with F-doped Li2 OHCl as the solid electrolyte showed good cyclability and a high coulombic efficiency over 40 charge/discharge cycles.
掺氟反钙钛矿锂离子导体 Li2（OH）X（X=Cl、Br）在全固态锂离子可再充电电池中作为固体电解质显示出有前途的应用前景。用 F(-)取代 OH(-)将正交相 Li2 OHCl 转化为室温立方相，其电化学稳定性相对于 Li(+) /Li 可达 9V，锂离子电导率比正交相 Li2 OHCl 高两个数量级。以掺氟 Li2 OHCl 为固体电解质的全固态 Li/LiFePO4 表现出良好的循环性能和超过 40 次充放电循环的高库仑效率。
