Method for manufacturing a positive electrode sheet for a lithium ion secondary battery and a positive electrode sheet for a lithium ion secondary battery
US11011750B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2016 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Jun 28, 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 producing a positive electrode sheet is provided with a positive current collecting foil made of aluminum and a battery positive active material layer containing positive active material particles made of LiNiMn based spinel and applied and dried on the current collecting foil. The positive active material layer includes a first binder made of polyacrylic acid with a molecular weight of 50,000 or less and a second binder made of polyacrylic acid with a molecular weight of 300,000 or more. The first positive electrode paste forming the positive active material layer satisfies expressions (1) to (3): α≥1.7 (1)β≥0.9 (2)α+β≤3.0 (3) where α is an additive amount of the first binder in pts. wt. and β is an additive amount of the second binder in pts. wt. when other solid content is 100 pts. wt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.