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US 11,777,078 B2Granted
Silicon carbon composite powder active material
AssigneeEnevate Corporation
InventorBenjamin Park
Life of this patent
Estimating the term…
Abstract
Systems and methods for generating silicon carbon composite powder that have the electrical properties of thicker, active material silicon carbon composite films or carbon composite electrodes, and may include a cathode, an electrolyte, and an anode, where the electrodes may include silicon carbon composite powder.
Claims11
A silicon carbon composite powder comprising:
- (1) about 70-96% (by weight) silicon particles, wherein the silicon particles have a D50 size distribution of about 0.1 μm to about 1.0 μm;
- (2) pyrolyzed carbon derived from a precursor polymer, which coats the surface of each of the individual silicon particles, and limits the surface exposure of the silicon particles;
- and
- (3) about 5-15% (by weight) graphite or other conductive carbon particles, wherein the graphite or other conductive carbon particles have a D50 size distribution of about 0.1 μm to about 1.0 μm;
- wherein said precursor polymer is selected from the group consisting of CMC (carboxymethyl cellulose);
- SBR (styrene-butadiene rubber);
- Sodium Alginate;
- PI (polyimide);
- PAI (polyamide-imide);
- PAA (polyacrylic acid);
- and mixtures thereof;
- and
- wherein the silicon carbon composite powder particles have a D50 size distribution in a range of about 5 μm to about 15 μm.
10 more elements
A battery, the battery comprising:
- one or more anodes, one or more cathodes, one or more current collectors and one or more electrolytes;
- wherein said one or more anodes comprise a silicon carbon composite powder comprising:
- (1) about 70-96% (by weight) silicon particles, wherein the silicon particles have a D50 size distribution of about 0.1 μm to about 1.0 μm;
- (2) pyrolyzed carbon derived from a precursor polymer, which coats the surface of each of the individual silicon particles, and limits the surface exposure of the silicon particles;
- and
- (3) about 5-15% (by weight) graphite or other conductive carbon particles, wherein the graphite or other conductive carbon particles have a D50 size distribution of about 0.1 μm to about 1.0 μm;
- wherein said precursor polymer is selected from the group consisting of CMC (carboxymethyl cellulose);
- SBR (styrene-butadiene rubber);
- Sodium Alginate;
- PI (polyimide);
- PAI (polyamide-imide);
- PAA (polyacrylic acid);
- and mixtures thereof;
- and
- wherein the silicon carbon composite powder particles have a D50 size distribution in a range of about 5 um to about 15 um.
12 more elements
An electrode, the electrode comprising:
- a silicon carbon composite powder comprising:
- (1) about 70-96% (by weight) silicon particles, wherein the silicon particles have a D50 size distribution of about 0.1 μm to about 1.0 μm;
- (2) pyrolyzed carbon derived from a precursor polymer, which coats the surface of each of the individual silicon particles, and limits the surface exposure of the silicon particles;
- and
- (3) about 5-15% (by weight) graphite or other conductive carbon particles, wherein the graphite or other conductive carbon particles have a D50 size distribution of about 0.1 μm to about 1.0 μm;
- wherein said precursor polymer is selected from the group consisting of CMC (carboxymethyl cellulose);
- SBR (styrene-butadiene rubber);
- Sodium Alginate;
- PI (polyimide);
- PAI (polyamide-imide);
- PAA (polyacrylic acid);
- and mixtures thereof;
- and
- wherein the silicon carbon composite powder particles have a D50 size distribution in a range of about 5 μm to about 15 μm.
11 more elements
Dependencies are inferred from the claim text.