2022年第69回応用物理学会春季学術講演会

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一般セッション(口頭講演)

6 薄膜・表面 » 6.4 薄膜新材料

[25p-F307-1~16] 6.4 薄膜新材料

2022年3月25日(金) 13:30 〜 18:00 F307 (F307)

田中 勝久(京大)、土屋 哲男(産総研)

14:15 〜 14:30

[25p-F307-4] Epitaxial thin film synthesis of layered rocksalt high-entropy oxide LiMO2
(M=1/6Cr, 1/6Mn, 1/6Fe, 1/6Co, 1/6Ni, and 1/6Cu)

〇(D)Kaidong Wang1、Kazunori Nishio1、Koji Horiba2、Miho Kitamura2、Kurei Edamura1、Daisuke Imazeki1、Ryo Nakayama1、Ryota Shimizu1、Hiroshi Kumigashira2,3、Taro Hitosugi1 (1.Tokyo Tech、2.PF-KEK、3.Tohoku Uni.)

キーワード:High-entropy oxides, Epitaxial thin films, Layered rocksalt structure

High-entropy oxides are emerging materials with unique functionalities. Currently, a variety of HEOs have been developed in bulk systems; HEOs in the cubic system, such as rock salt, fluorite, and perovskite, have been reported. However, HEOs with anisotropic crystal structures have been paid little attention yet. In addition, the synthesis of HEO epitaxial thin films is still in the early stages of research. Accordingly, in this study, we focused on synthesizing HEO epitaxial thin films with a layered rock-salt structure, LiMO2, containing six transition metals (M: Cr, Mn, Fe, Co, Ni, and Cu) in equiatomic ratios. Furthermore, we investigated battery performances by fabricating thin-film type all-solid-state Li batteries using the HEO epitaxial thin films as a positive electrode.