[11a-W641-1~10] 6.3 Oxide electronics

△ [11a-W641-6] Fabrication and evaluation of all-solid-state Li batteries using 5 V-class-cathode LiCo_0.5Mn_1.5O₄ epitaxial thin films

〇Ryo Nakayama¹, Kazunori Nishio¹, Naoto Nakamura¹, Ryota Shimizu^1,2, Taro Hitosugi¹ (1.Tokyo Tech, 2.JST-PRESTO)

Keywords:all-solid-state Li battery, epitaxial thin film, 5 V-class-cathode

All-solid-state Li battery is a promising next-generation battery for electric vehicles. For practical solid-state battery applications, the development of high-power batteries using 5 V-class-cathode materials is important. However, few studies have aimed to achieve low interface resistance between solid electrolytes and cathode materials operating over 5 V. In this study, we succeeded in the quantitative evaluation of interface resistance above 5 V by the fabrication of thin film model electrodes using 5 V-class cathode LiCo_0.5Mn_1.5O₄ epitaxial thin films.