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, 2022
Filed:
Oct. 25, 2019
Toda Kogyo Corp., Hiroshima, JP;
Akihisa Kajiyama, Onoda, JP;
Ryuta Masaki, Onoda, JP;
Tsuyoshi Wakiyama, Onoda, JP;
Tetsuya Kashima, Onoda, JP;
Shoichi Fujino, Onoda, JP;
Osamu Sasaki, Onoda, JP;
Kazutoshi Matsumoto, Onoda, JP;
TODA KOGYO CORP., Hiroshima, JP;
Abstract
Provided herein are processes for producing positive electrode active substance particles for non-aqueous electrolyte secondary batteries which is excellent in life characteristics of a battery with respect to a repeated charging and discharging performance thereof, as well as a non-aqueous electrolyte secondary battery. In particular, provided herein are processes for producing a positive electrode active substance for non-aqueous electrolyte secondary batteries comprising lithium transition metal layered oxide having a composition represented by the formula: Li(NiCoMn)Owherein a is 1.0≤a≤1.15; x is 0<x<1; and y is 0<y<1, in which the positive electrode active substance is in the form of secondary particles formed by aggregating primary particles thereof, and a coefficient of variation of a compositional ratio: Li/Me wherein Me is a sum of Ni, Co and Mn as measured on a section of the secondary particle is not more than 25%.