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US 2026/0088292 A1Published application
Negative electrode active material for rechargeable lithium battery, negative electrode including the same, and preparation method of the same
AssigneeSamsung SDI Co., Ltd.
InventorCHUL YOUM
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Abstract
A negative electrode active material, a negative electrode for a rechargeable lithium battery including the same, and a method for preparing the same are provided. A negative electrode active material includes a carbon-based material, and a surface modifier on a surface of the carbon-based material, where the surface modifier includes a polar functional group, and the polar functional group contains at least one of a carboxyl group, an amine group, a thiol group, and/or a combination thereof.
Claims20
A negative electrode active material comprising:
- a carbon-based material;
- and
- a surface modifier on a surface of the carbon-based material,
- wherein the surface modifier comprises a polar functional group, and
- wherein the polar functional group comprises at least one of a carboxyl group, an amine group, a thiol group, or a combination thereof.
2 more elements
A negative electrode, comprising:
- a negative electrode current collector;
- and
- a negative electrode active material layer on the negative electrode current collector, and comprising a negative electrode active material,
- wherein the negative electrode active material comprises a surface modifier,
- wherein the surface modifier chemically bonds the negative electrode active material to a surface of the negative electrode current collector utilizing at least one of sulfur (S), nitrogen (N), or a combination thereof as a medium, and
- wherein the negative electrode is a negative electrode for a rechargeable lithium battery.
3 more elements
A method comprising:
- preparing a negative electrode current collector;
- preparing a negative electrode active material;
- and
- forming a negative electrode active material layer comprising the negative electrode active material on the negative electrode current collector,
- wherein the preparing of the negative electrode active material comprises:
- soaking a carbon-based material in a first solution to perform a first surface modification;
- and
- soaking the first surface-modified carbon-based material in a second solution to perform a second surface modification,
- wherein the first solution is an acid solution,
- wherein the second solution comprises at least one of an amine-based compound, a thiol-based compound, or a combination thereof, and
- wherein the method is a method for preparing a negative electrode for a rechargeable lithium battery.
8 more elements
Dependencies are inferred from the claim text.