Positive electrode active material, and lithium secondary battery using same
US10840509B2 · kind B2 · utility
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Key dates
| Filing date | Jan 22, 2014 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Aug 24, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A positive electrode active material for lithium secondary batteries disclosed herein comprises a lithium transition metal oxide of a layered structure, represented by formula Li1+αNixCoyMnzCaβMγO2 (where −0.05≤α≤0.2, x+y+z+β+γ≅1, 0.3≤x≤≤0.7, 0.1≤y≤0.4, 0.1≤z≤0.4, 0.0002≤β≤0.0025, 0.0002≤β+γ≤0.02, and in a case where γ>0, M is absent or represents one, two or more elements selected from the group consisting of Na, Mg, Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W). The tap density of the positive electrode active material ranges from 1.8 to 2.5 g/cm3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.