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:
Aug. 25, 2020
Filed:
Jun. 02, 2016
Sumitomo Chemical Company, Limited, Tokyo, JP;
Tanaka Chemical Corporation, Fukui-shi, Fukui, JP;
Hiroyuki Kurita, Osaka, JP;
Jun-ichi Kageura, Tsukuba, JP;
Yuichiro Imanari, Tsukuba, JP;
Yasutaka Iida, Fukui, JP;
Daisuke Yamashita, Fukui, JP;
Takaaki Masukawa, Fukui, JP;
Hiroyuki Ito, Fukui, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
TANAKA CHEMICAL CORPORATION, Fukui, JP;
Abstract
A positive electrode active material for a lithium secondary cell, having a layered structure and comprising at least nickel, cobalt and manganese, the positive electrode active material satisfying requirements (1), (2) and (3) below: (1) a composition represented by a composition formula: Li[Li(NiCoMnM)]O, wherein 0≤x≤0.10, 0.30<α≤0.34, 0.30<β≤0.34, 0.32≤γ<0.40, 0≤δ≤0.10, β<γ, δ+α+β+γ=1, M represents at least one metal selected from the group consisting of Fe, Cu, Ti, Mg, Al, W, Zn, Sn, Zr, Ga and V; (2) a secondary particle diameter of 2 μm or more and 10 μm or less; and (3) a maximum peak value in a pore diameter range of 90 nm to 150 nm in a pore diameter distribution determined by mercury porosimetry.