Negative electrode including first layer having low compressive strength carbon active material and silicon active material and second layer having high compressive strength carbon active material and nonaqueous electrolyte secondary battery including the same
US11909033B2 · kind B2 · utility
5Cited by
2References
7Claims
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Key dates
| Filing date | Jan 22, 2019 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Jan 27, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a nonaqueous electrolyte secondary battery, a negative electrode mix layer includes a first layer and a second layer disposed successively from a negative electrode collector. The first layer contains a first carbon-based active material having a 10% compressive strength of 3 MPa or less and a silicon-based active material containing Si. The second layer contains a second carbon-based active material having a 10% compressive strength of 5 MPa or more and has a lower content (mass ratio) of the silicon-based active material than the first layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.