Technology Innovation Division, Panasonic Corporation, 1006 Kadoma, Kadoma-shi, Osaka, 571-8508, Japan.
Adv Mater. 2018 Nov;30(44):e1803075. doi: 10.1002/adma.201803075. Epub 2018 Sep 14.
New lithium halide solid-electrolyte materials, Li YCl and Li YBr , are found to exhibit high lithium-ion conductivity, high deformability, and high chemical and electrochemical stability, which are required properties for all-solid-state battery (ASSB) applications, particularly for large-scale deployment. The lithium-ion conductivities of cold-pressed powders surpass 1 mS cm at room temperature without additional intergrain or grain boundary resistances. Bulk-type ASSB cells employing these new halide solid electrolyte materials exhibit coulombic efficiencies as high as 94% with an active cathode material of LiCoO without any extra coating. These superior electrochemical characteristics, as well as their material stability, indicate that lithium halide salts are another promising candidate for ASSB solid electrolytes in addition to sulfides or oxides.
新的卤化锂固体电解质材料 LiYCl 和 LiYBr 具有高锂离子电导率、高可变形性以及高化学和电化学稳定性，这些都是全固态电池 (ASSB) 应用所必需的特性，特别是对于大规模应用。冷压粉末的锂离子电导率在室温下超过 1 mS cm，无需额外的晶粒间或晶界电阻。采用这些新型卤化物固体电解质材料的块状 ASSB 电池，在不使用任何额外涂层的情况下，使用 LiCoO 作为活性阴极材料，其库仑效率高达 94%。这些优异的电化学特性以及其材料稳定性表明，卤化锂盐除了硫化物或氧化物之外，也是 ASSB 固体电解质的另一种有前途的候选材料。
