Positive electrode active material for lithium secondary batteries, method of producing positive electrode active material for lithium secondary batteries, positive electrode for lithium secondary batteries, and lithium secondary battery
US11437618B2 · kind B2 · utility
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Key dates
| Filing date | Nov 4, 2016 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Nov 26, 2036 |
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 which is able to doped/undoped with lithium ions and contains at least Ni, in which a ratio P/Q (atom %/mass %) of a concentration P (atom %) of sulfur atoms being present in a surface of the positive electrode active material to a concentration Q (mass %) of sulfuric acid radicals being present in the whole positive electrode active material is more than 0.8 and less than 5.0, and the Q (mass %) is 0.01 or more and 2.0 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.