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:
Dec. 31, 2019
Filed:
Dec. 19, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Yukiko Hori, Miyoshi, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
A method for manufacturing a positive electrode for a lithium ion secondary battery includes preparing lithium manganese complex oxide particles, preparing coated particles by forming a coating including a Li-conductive oxide on a surface of each lithium manganese complex oxide particle, introducing fluorine into at least a part of the coated particles, preparing a fluid composition by mixing the coated particles at least a part of which fluorine is introduced into, a conductive material, an aqueous binder, and an aqueous solvent, forming a positive electrode mixture layer by disposing the fluid composition on a surface of a collector, and drying the positive electrode mixture layer. The thickness of the coating is 5 nm or more and 10 nm or less. Fluorine is introduced such that the ratio of fluorine to manganese in terms of the number of atoms in the coated particles reaches 1.95 or more and 3.1 or less.