Negative electrode for nonaqueous secondary battery, method for producing the same, and nonaqueous secondary battery
US9590239B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2014 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Jan 4, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a negative electrode for a nonaqueous secondary battery which achieves both suppression of reductive decomposition of an electrolyte or an electrolytic solution and suppression of an increase in resistance. Also provided are a method for producing such a negative electrode and a nonaqueous secondary battery employing such a negative electrode. A polymer coating layer is formed so as to coat at least part of surfaces of negative electrode active material particles containing silicon oxide (SiOx; 0.5≦x≦1.6). The polymer coating layer contains a cationic polymer having a positive zeta potential under neutral conditions. Since silicon oxide has a negative zeta potential, a thin uniform coating layer can be formed owing to Coulomb's force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.