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. 02, 2016
Filed:
Sep. 28, 2010
Manabu Yamamoto, Fukuoka-ken, JP;
Daisuke Nishikawa, Fukuoka-ken, JP;
Kazutoshi Ishizaki, Fukuoka-ken, JP;
Kazuhiko Kikuya, Fukuoka-ken, JP;
Teruaki Santoki, Fukuoka-ken, JP;
Osamu Sasaki, Fukuoka-ken, JP;
Hideaki Sadamura, Fukuoka-ken, JP;
Manabu Yamamoto, Fukuoka-ken, JP;
Daisuke Nishikawa, Fukuoka-ken, JP;
Kazutoshi Ishizaki, Fukuoka-ken, JP;
Kazuhiko Kikuya, Fukuoka-ken, JP;
Teruaki Santoki, Fukuoka-ken, JP;
Osamu Sasaki, Fukuoka-ken, JP;
Hideaki Sadamura, Fukuoka-ken, JP;
TODA KOGYO CORPORATION, Hiroshima, JP;
Abstract
Positive electrode active substance particles including a compound having at least a crystal system belonging to a space group of R−3m and a crystal system belonging to a space group of C2/m, and boron. The compound is a composite oxide comprising at least Li, Mn, and Co and/or Ni; a relative intensity ratio [(a)/(b)] of a maximum diffraction peak intensity (a) observed at 2θ=20.8±1° in a powder X-ray diffraction pattern of the positive electrode active substance as measured using a Cu-Ku ray to a maximum diffraction peak intensity (b) observed at 2θ=18.6±1° in the powder X-ray diffraction pattern, is 0.02 to 0.5; a content of Mn in the positive electrode active substance particles such that a molar ratio of Mn/(Ni+Co+Mn) is not less than 0.55; and the positive electrode active substance particles include boron in an amount of 0.001 to 3% by weight.