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. 08, 2019
Filed:
Apr. 20, 2015
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Jun Yokoyama, Niihama, JP;
Yuki Furuichi, Niihama, JP;
Tomoko Nakayama, Niihama, JP;
Tetsufumi Komukai, Niihama, JP;
Kensaku Mori, Niihama, JP;
Mitsuru Yamauchi, Niihama, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
A positive electrode active material for a non-aqueous electrolyte secondary battery, including primary particles of a lithium nickel composite oxide represented by the formula: LiNiCoMOwherein M represents at least one element selected from Mg, Al, Ca, Ti, V, Cr, Mn, Nb, Zr and Mo; b represents a number satisfying 0.95≤b≤1.03; and x represents a number satisfying 0<x≤0.15 and y represents a number satisfying 0<y≤0.07, wherein the sum total of x and y is 0.16 or smaller, i.e., x+y≤0.16) and secondary particles that are aggregates of the primary particles, wherein microparticles containing W and Li are present on the surface of each of the primary particles, and the length of axis-c of the lithium nickel composite oxide is 14.183 angstroms or more as determined by a Rietveld analysis of X-ray diffraction data on the oxide.