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. 21, 2011
Filed:
Apr. 24, 2008
Tatsuyuki Kuwahara, Moriguchi, JP;
Shinya Miyazaki, Moriguchi, JP;
Tatsuyuki Kuwahara, Moriguchi, JP;
Shinya Miyazaki, Moriguchi, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, Osaka, JP;
Abstract
A non-aqueous electrolyte secondary cell that has high capacity and excellent cycle characteristic while preventing cell swelling is provided. The positive electrode of the cell has, as the positive electrode active material, lithium nickel composite oxide represented by LiNiMOwhere 0.9<x≦1.1, 0≦y≦0.7, 1.9≦z≦2.1, and M contains at least one selected from Al, Co, and Mn. The amount of lithium carbonate on the surface of the lithium nickel composite oxide is 0.20 mass % or less relative to the lithium nickel composite oxide. On the surface of the positive electrode, a porous layer having inorganic oxide and lithium carbonate is provided.