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:
May. 17, 2005
Filed:
Nov. 08, 2001
Yoshinori Naruoka, Kyoto, JP;
Junichi Toriyama, Kyoto, JP;
Masanao Terasaki, Kyoto, JP;
Japan Storage Battery Co., Ltd., Kyoto, JP;
Abstract
A positive active material for a non-aqueous electrolyte secondary battery includes a lithium-nickel composite oxide represented by the compositional formula LiNiCOMnO(a≦1.09, 0.05≦b≦0.35, 0.15≦c≦0.35, and 0.25≦b+c≦0.55). By X-ray diffractometry with a CuKα ray, the lithium-nickel composite oxide exhibits an intensity ratio R ((I+I)/I) of not greater than 0.50, wherein R is the ratio of the sum of the diffraction peak intensity Ion the 012 plane and the diffraction peak intensity Ion the 006 plane to the diffraction peak intensity Ion the 101 plane. The crystallinity of the positive active material of the compositional formula LiNiCoMnOcan be kept high and it is possible to secure good capacity density and cycle life performance.