Observation of Vanadium ion and Lithium ion diffusion in battery materials by muSR

Li-ion battery material, Li8/7V4/7Ti2/7O2 is found that not only Li but also V ion move. The movement of V plays an important role to keep volume over charge reactions, which is a key for a near future all-solid battery. We will aim to study Li diffusion and V migration as a function of charge states.

研究发现，锂离子电池材料Li₈/₇V₄/₇Ti₂/₇O₂中，不仅锂离子会发生迁移，钒离子（V ion）同样参与迁移过程。钒离子的迁移对于维持充电反应中的体积稳定性发挥着关键作用，而这一特性是近期全固态电池（all-solid battery）研发的核心要点。本研究将以充电状态为变量，系统探究锂离子的扩散行为与钒离子的迁移规律。