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:
Feb. 18, 2003
Filed:
Feb. 14, 2001
Nobumichi Nishida, Tokushima, JP;
Takuya Morimoto, Tokushima, JP;
Masatoshi Takahashi, Tokushima, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
In a non-aqueous electrolyte secondary cell having a positive electrode mainly composed of a positive electrode active material, a negative electrode, and a non-aqueous electrolyte, the positive electrode active material includes a lithium-containing transition metal complex oxide represented with hexagonal structure by the general formula LiCo M O , wherein M is at least one element selected from the group consisting of V, Cr, Fe, Mn, Ni, Al, and Ti, and a crystallite size (110) of the lithium-containing transition metal complex oxide is greater than 1000 Å. Thereby, the thermal stability of the positive electrode active material is increased, and the discharge characteristic and the charge-discharge characteristic of the cell are improved.