Negative active material for rechargeable lithium battery, method for preparing same, negative electrode including the same and rechargeable lithium battery including same
US11276859B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Sep 4, 2019 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | Apr 9, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative active material for a rechargeable lithium battery includes natural graphite including secondary particles in which a plurality of primary particles are assembled; amorphous carbon on the surface of the primary particles; and a coating layer including amorphous carbon surrounding the secondary particles, wherein the primary particles have an average particle diameter of about 5 μm to about 15 μm, the secondary particles have an average particle diameter of about 8 μm to about 24 μm, and a peak intensity ratio I(002)/I(110) is less than or equal to about 120 as measured by X-ray diffraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.