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:
Nov. 08, 2011
Filed:
Mar. 16, 2007
Atsushi Kaiduka, Moriguchi, JP;
Yasunori Baba, Moriguchi, JP;
Naoki Imachi, Moriguchi, JP;
Yoshinori Kida, Moriguchi, JP;
Shin Fujitani, Moriguchi, JP;
Atsushi Kaiduka, Moriguchi, JP;
Yasunori Baba, Moriguchi, JP;
Naoki Imachi, Moriguchi, JP;
Yoshinori Kida, Moriguchi, JP;
Shin Fujitani, Moriguchi, JP;
SANYO Electric Co., Ltd., Osaka, JP;
Abstract
A non-aqueous electrolyte secondary battery includes a positive electrode having a positive electrode active material layer containing a positive electrode active material, a negative electrode having a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, an electrode assembly comprising the positive electrode, the negative electrode, and the separator, and a non-aqueous electrolyte impregnated in the electrode assembly. The positive electrode active material contains at least cobalt or manganese. The positive electrode has an end-of-charge potential of 4.40 V versus the potential of a lithium reference electrode. The positive electrode active material layer is superficially coated with a polymer layer composed of a polymer having a partially cross-linked structure and a molecular weight of 800,000 or greater.