Non-aqueous electrolyte secondary battery, negative electrode material, and making method
US8105718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2009 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Sep 25, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative electrode material comprising an active material and 1-20 wt % of a polyimide resin binder is suitable for use in non-aqueous electrolyte secondary batteries. The active material comprises silicon oxide particles and 1-50 wt % of silicon particles. The negative electrode exhibits improved cycle performance while maintaining the high battery capacity and low volume expansion of silicon oxide. The non-aqueous electrolyte secondary battery has a high initial efficiency and maintains improved performance and efficiency over repeated charge/discharge cycles by virtue of mitigated volumetric changes during charge/discharge cycles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.