Lithium silicate-based compound, positive electrode active material for lithium ion secondary battery, and lithium ion secondary battery using the same
US9330805B2 · kind B2 · utility
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Key dates
| Filing date | Jul 26, 2012 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Jul 26, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a novel lithium silicate-based material useful as a positive electrode material for lithium ion secondary battery.The lithium silicate-based compound is represented by Li1.5FeSiO4.25. The lithium silicate-based compound is a compound including: lithium (Li); iron (Fe); silicon (Si); and oxygen (O), and expressed by a composition formula, Li1+2δFeSiO4+δ−c (−0.25≦δ≦0.25, 0≦c≦0.5). The lithium silicate-based compound, of which iron (Fe) is trivalent, exerts a remarkable chemical stability as compared to Li2FeSiO4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.