closo-type complex hydrides contain large cage-type complex polyanions in their crystal structures and thus can exhibit superior ion-conducting properties (e.g., Li and Na). However, the unique structures of complex polyanions have made it challenging to modify crystal structures, making systematic control of ion conductivity difficult. Here, we report an atom deficiency approach to enhance lithium-ion conductivity of complex hydrides. We find that lithium and hydrogen could be simultaneously extracted from Li₂B₁₂H₁₂ by applying a small external energy, enabling the formation of atom deficiencies. These atom deficiencies lead to an increase in carrier concentration, improving lithium-ion conductivity by 3 orders of magnitude compared to that of a pristine material. An all-solid-state TiS₂/Li battery employing atom-deficient Li₂B₁₂H₁₂ as a solid electrolyte exhibits superior battery performance during repeated discharge–charge cycles. The current study suggests that the atom deficiency can be a useful strategy to develop high ion-conducting complex hydride solid electrolytes.

中文翻译：

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快速锂离子传导在Atom的缺陷闭合碳-类型复合氢化物固体电解质

梭型复合氢化物在其晶体结构中包含大的笼型复合阴离子，因此可以表现出优异的离子导电性能（例如，Li和Na）。但是，复杂的聚阴离子的独特结构使其难以修饰晶体结构，从而难以系统地控制离子电导率。在这里，我们报告了一种原子不足的方法来增强复杂氢化物的锂离子电导率。我们发现锂和氢可以同时从Li ₂ B ₁₂ H _12中提取通过施加较小的外部能量，可以形成原子缺陷。这些原子缺陷导致载流子浓度增加，与原始材料相比，锂离子电导率提高了3个数量级。采用缺原子的Li ₂ B ₁₂ H ₁₂作为固体电解质的全固态TiS ₂ / Li电池在反复的放电-充电循环中表现出优异的电池性能。当前的研究表明，原子不足可能是开发高离子传导复合氢化物固体电解质的有用策略。