[17a-A408-1~7] 6.3 Oxide electronics

[17a-A408-7] In situ XAFS observation of amorphous TF-LIBs

〇Natsuki Matsuda¹, Kenta Tsuji¹, Keisuke Omosako¹, Isaku Kanno¹ (1.Kobe Univ.)

Keywords:thin film, lithium ion battery, XAFS

In this study, in situ XAFS measurements were performed on amorphous Li-ion thin-film batteries to evaluate the valence change of cathode V-ion. XAFS measurements were performed 13 times in total for the initial state, 30-minute charge, full charge, 30-minute discharge, and full discharge in each cycle. The increase and decrease of the V-ion valence due to the desorption and insertion of Li ions during charging and discharging were captured.