Lithium secondary battery
US10217991B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Jun 2, 2015 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Feb 29, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte, and more particularly, the positive electrode includes a positive active material including lithium-metal oxide in which at least one metal has a continuous concentration gradient from the center to the surface, and the negative electrode includes a negative active material including graphite having an average lattice distance (d002) in the range of 3.356 to 3.365 Å, thereby improving storage characteristics at a high temperature and lifetime characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.