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:
Sep. 06, 2022
Filed:
Nov. 04, 2016
Sumitomo Chemical Company, Limited, Tokyo, JP;
Tanaka Chemical Corporation, Fukui, JP;
Takashi Arimura, Tsukuba, JP;
Jun-ichi Kageura, Tsukuba, JP;
Kenji Takamori, Tsukuba, JP;
Kimiyasu Nakao, Fukui, JP;
Daisuke Yamashita, Fukui, JP;
Yusuke Maeda, Fukui, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
TANAKA CHEMICAL CORPORATION, Fukui, JP;
Abstract
A positive electrode active material for lithium secondary batteries which is able to doped/undoped with lithium ions and contains at least Ni, in which a ratio P/Q (atom %/mass %) of a concentration P (atom %) of sulfur atoms being present in a surface of the positive electrode active material to a concentration Q (mass %) of sulfuric acid radicals being present in the whole positive electrode active material is more than 0.8 and less than 5.0, and the Q (mass %) is 0.01 or more and 2.0 or less.