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US 9,793,539 B2Granted
Negative electrode for rechargeable lithium battery, rechargeable lithium battery including same and method of preparing rechargeable lithium battery
AssigneeSamsung SDI Co., Ltd.
InventorsKyeu-Yoon Sheem, Jake Kim
Life of this patent
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Abstract
A negative electrode for a rechargeable lithium battery that includes a negative active material layer including a carbon-based material having a peak of about 20 degrees to 30 degrees at a (002) plane in an X-ray diffraction pattern using a CuKα ray, and an SEI (solid electrolyte interface) passivation film including at least one material selected from an organic material and an inorganic material and having an average thickness of about 10 nm to about 50 nm on the surface of the active material layer of the electrode.
Claims8
A negative electrode for a rechargeable lithium battery, the negative electrode comprising:
- a negative active material layer comprising a carbon-based material having a peak of about 20 degrees to 30 degrees at a (002) plane in an X-ray diffraction pattern using a CuKα ray;
- and
- an SEI (solid electrolyte interface) passivation film on a surface of the negative active material layer of the negative electrode and having an average thickness of about 20 nm to about 46 nm, the SEI passivation film comprising:
- an organic material and LiF;
- wherein the LiF is included in an amount of about 31 weight % to about 53 weight % based on the total weight of the SEI passivation film;
- a weight % of the LiF being smaller than a weight % of the organic material at the surface of the negative active material layer of the negative electrode.
3 more elements
Dependencies are inferred from the claim text.