The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2019
Filed:
Feb. 24, 2014
Umicore, Brussels, BE;
Umicore Korea Ltd., Chungnam, KR;
Tokyo University of Science Foundation, Tokyo, JP;
Jens Paulsen, Daejeon, KR;
Shinichi Komaba, Tokyo, JP;
Ryo Hara, Tokyo, JP;
Naoaki Yabuuchi, Tokyo, JP;
Masataka Kajiyama, Tokyo, JP;
UMICORE, Brussels, BE;
UMICORE KOREA LTD., Chungnam, KR;
TOKYO UNIVERSITY OF SCIENCE FOUNDATION, Tokyo, JP;
Abstract
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<0.2 and y<0.33 and 0.66<x<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<a<0.2, c<0.2 and 0.2<a+b<0.46 and 0.66<x<0.95, and wherein A consists of either one of more elements of the group Ti, Fe, Ni and Co.