[12p-S203-1~13] 6.3 Oxide electronics

△ [12p-S203-8] Li-ion intercalation to LiV₂O₄ epitaxial films and in-situ structural analysis

〇Tatsuya Yajima¹, Takuto Soma¹, Akira Ohtomo^1,2 (1.Tokyo Tech, 2.MCES)

Keywords:Li-ion intercalation, In-situ structural analysis, Epitaxial thin film

When epitaxial thin films are used as model electrodes, the thickness and/or orientation can be controlled, which is effective for the understanding of the mechanism of Li-ion (de)intercalation to electrode materials. We performed Li-ion (de)intercalation to spinel-type LiV₂O₄ epitaxial films and in-situ structural analysis. In the case of thin films, it was always a single phase, but in the case of thick films, a new phase was formed. These results indicate that the Li-ion intercalation process is different depending on the film thickness.