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:
Apr. 11, 2017
Filed:
Sep. 30, 2014
Tdk Corporation, Tokyo, JP;
Hiroyuki Miyabara, Tokyo, JP;
Hiroki Kitamura, Tokyo, JP;
Yukiko Hirabayashi, Tokyo, JP;
Masaki Sobu, Tokyo, JP;
Tetsuo Takaishi, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
A lithium ion secondary battery with a high electrode density and an excellent rate discharge characteristic. The positive electrode includes a positive electrode active material of a compound represented by Li(NiCoAl)O(0.95≦a≦1.05, 0.5≦x≦0.9, 0.05≦y≦0.2), and carbon adhered to the surface of the material, in the Raman spectrum using a laser of 532 nm, the positive electrode includes a peak P(D band) at 1200˜1450 cm, a peak P(G band) at 1450˜1700 cmand a peak Pat 400˜600 cm, and when the intensities are normalized by regarding the maximum intensity as 1 and the minimum intensity as 0 in the wavenumber domain of 200˜1800 cm, Raman intensity of the minimum (V band) between the two peaks of said peak Pand said peak Pis 0.6 or less, and Raman intensity of said peak Pis 0.1 or more and 0.5 or less.