[9p-E202-1~15] 1.4 Energy conversion, storage, resources and environment

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)

[9p-E202-6] Investigation of Low-Temperature-Grown Li₂MnO₃Cathode for All-Solid-State Thin-Film Lithium-Ion Batteries

〇Ryotaro Matsumoto¹, Takumi Ikenoue¹, Riki Kataoka², Yasushi Maeda², Iwao Kawayama¹, Toshiya Doi¹ (1.Kyoto Univ., 2.AIST)

Keywords:

lithium-ion battery,thin-film battery,cathode material

RF magnetron sputtering was used to fabricate low-temperature-grown Li₂MnO₃(LMO) cathode thin films, and XRD measurements confirmed that the LMO exhibited a disordered rock-salt structure. Furthermore, a Li₃PO₄ (LPO) solid electrolyte thin film was formed directly on the LMO layer to fabricate a cell structure in which LMO does not directly contact the liquid electrolyte. The charge–discharge behavior was compared with and without the LPO layer. As a result, the initial activation reaction derived from disordered rock-salt LMO was observed even after LPO deposition, and no significant difference in charge–discharge voltage was observed.