Positive electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, and lithium secondary battery
US10535875B2 · kind B2 · utility
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Key dates
| Filing date | Oct 13, 2015 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Dec 24, 2035 |
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, which has a crystallite size α/crystallite size β ratio (α/β) of 1 to 1.75 or less, wherein the crystallite size α is within a peak region of 2θ=18.7±1° and the crystallite size β is within a peak region of 2θ=44.6±1°, each determined by a powder X-ray diffraction measurement using Cu-Kα ray, and has a composition represented by formula (I) below: Li[Lix(NiaCobMncMd)1-x]O2 (I) wherein 0≤x≤0.2, 0.3<a<0.7, 0<b<0.4, 0<c<0.4, 0≤d<0.1, a+b+c+d=1, and M is at least one metal selected from the group consisting of Fe, Cr, Ti, Mg, Al and Zr.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.