Solid Halide Electrolytes with High Lithium‐Ion Conductivity for Application in 4 V Class Bulk‐Type All‐Solid‐State Batteries,Advanced Materials

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Solid Halide Electrolytes with High Lithium‐Ion Conductivity for Application in 4 V Class Bulk‐Type All‐Solid‐State Batteries
Advanced Materials ( IF 27.4 ) Pub Date : 2018-09-14 , DOI: 10.1002/adma.201803075
Tetsuya Asano ₁ , Akihiro Sakai ₁ , Satoru Ouchi ₁ , Masashi Sakaida ₁ , Akinobu Miyazaki ₁ , Shinya Hasegawa ₁

Affiliation

New lithium halide solid‐electrolyte materials, Li₃YCl₆ and Li₃YBr₆, 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⁻¹ 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 LiCoO₂ 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.

中文翻译：

高锂离子电导率的固体卤化物电解质，用于4 V级大容量全固态电池

发现新型的卤化锂固体电解质材料Li ₃ YCl ₆和Li ₃ YBr ₆具有高的锂离子传导性，高的可变形性以及高的化学和电化学稳定性，这是全固态电池所必需的性能（ ASSB）应用程序，特别是用于大规模部署。在室温下，冷压粉末的锂离子电导率超过1 mS cm ^-1，而没有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大体积ASSB电池与LiCoO ₂活性阴极材料的库仑效率高达94％没有任何额外的涂层。这些优异的电化学特性及其材料稳定性表明，除了硫化物或氧化物以外，卤化锂盐是ASSB固体电解质的另一个有希望的候选者。

更新日期：2018-09-14

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