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:
Jun. 10, 2014
Filed:
Mar. 03, 2010
Hirohito Satoh, Kitaibaraki, JP;
Yoshio Kajiya, Kitaibaraki, JP;
Ryuichi Nagase, Kitaibaraki, JP;
JX Nippon Mining & Metals Corporation, Tokyo, JP;
Abstract
Disclosed is a positive electrode active material that provides an improved capacity density. Specifically disclosed is a positive electrode active material for a lithium ion battery with a layered structure represented by Li(NiM)O(wherein M represents at least one element selected from a group consisting of Mn, Co, Mg, Al, Ti, Cr, Fe, Cu, and Zr; x is in the range from 0.9 to 1.2; y is in the range from 0.3 to 0.95; and z is in the range from 1.8 to 2.4), wherein, when a value obtained by dividing an average of peak intensities observed between 1420 and 1450 cmand between 1470 and 1500 cmby the maximum intensity of a peak appearing between 520 and 620 cmin an infrared absorption spectrum obtained by FT-IR is represented by A, A satisfies the following relational formula: 0.20y−0.05≦A≦0.53y−0.06.