Material for negative electrode of non-aqueous electrolyte secondary battery, process for producing the same, negative electrode and battery
US8574533B2 · kind B2 · utility
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Key dates
| Filing date | Mar 25, 2005 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Jan 4, 2028 |
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 for non-aqueous electrolyte secondary batteries, comprises: a carbon material having a sphericity of at least 0.8, and exhibiting an average (002) interlayer spacing d002 of 0.365-0.400 nm, a crystallite size in a c-axis direction Lc(002) of 1.0-3.0 nm, as measured by X-ray diffractometry, a hydrogen-to-carbon atomic ratio (H/C) of at most 0.1 as measured by elementary analysis, and an average particle size Dv50 of 1-20 μm. The negative electrode material is spherical and exhibits excellent performances including high output performance and durability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.