Method for manufacturing positive electrode for lithium ion secondary battery and positive electrode for lithium ion secondary battery
US10522829B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2017 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Jul 11, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.