Umicore

Tokyo University of Science Foundation

Umicore Korea, Ltd.

Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Ryo Hara

Norio Takami

Jens M Paulsen

Keigo Hoshina

Dai Yamamoto

Yuki Watanabe

Shinichi Komaba

Nobuyasu Negishi

Naoaki Yabuuchi

Yasuhiro Harada

Kazuhiro Namba

Masataka Kajiyama

A sodium transition metal cathode material for a rechargeable sodium battery having a P2 layered bronze crystal structure, comprising at least 55 mol % manganese, wherein the manganese valence state is at least 3.75. The material undergoes a structural transformation to a secondary cathode material by extraction of sodium during the 1charge of a rechargeable sodium battery comprising the sodium cathode material. The material has either a composition NaMOwhere M=MnLiAwhere z&#x3c;0.2 and y&#x3c;0.33 and 0.66&#x3c;x&#x3c;0.95, and wherein A consists of either one of more elements of the group Ti, Fe, Ni, Mg and Co, or a composition NaxMO2 where M=LiMnMgAwhere 0&#x3c;a&#x3c;0.2, c&#x3c;0.2 and 0.2&#x3c;a+b&#x3c;0.46 and 0.66&#x3c;x&#x3c;0.95, and wherein A consists of either one of more elements of the group Ti, Fe, Ni and Co.

Doped sodium manganese oxide cathode material for sodium ion batteries

Growing community of inventors

Tokyo, Japan

Ryo Hara