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:
Oct. 15, 2013
Filed:
Sep. 30, 2010
Denis Yau Wai Yu, Kobe, JP;
Katsunori Yanagida, Kobe, JP;
Denis Yau Wai Yu, Kobe, JP;
Katsunori Yanagida, Kobe, JP;
SANYO Electric Co., Ltd., Moriguchi-shi, Osaka, JP;
Abstract
A positive electrode active material having a lithium-excess lithium-transition metal composite oxide particle represented by the chemical formula LiMnNiCoO. The lithium-excess lithium-transition metal composite oxide particle has an inner portion (1) having a layered structure and a surface adjacent portion (2) having a crystal structure gradually changing from a layered structure to a spinel structure from the inner portion (1) toward the outermost surface portion (3). The layered structure and the spinel structure have an identical ratio of the amount of Mn and the total amount of Ni and Co.