Method and system for silosilazanes, silosiloxanes, and siloxanes as additives for silicon dominant anodes
Systems and methods for silosilazanes, silosiloxanes, and siloxanes as additives for silicon-dominant anodes in a battery that may include a cathode, an electrolyte, and an anode active material. The active material may comprise 50% or more silicon as well as an additive including one or more of: silosilazane, silicon oxycarbides, and polyorganosiloxane. The silosilazane may comprise one or more amine groups, silanols, silyl ethers, sylil chlorides, dialkylamoinosilanes, silyl hydrides, and cyclic azasilanes. The active material may comprise a film with a thickness between 10 and 80 microns. The film may have a conductivity of 1 S/cm or more. The active material may comprise between 50% and 95% silicon. The active material may be held together by a pyrolyzed carbon film. The anode may comprise lithium, sodium, potassium, silicon, and/or mixtures and combinations thereof. The battery may comprise a lithium ion battery. The electrolyte may comprise a liquid, solid, or gel.
1. A battery, the battery comprising:
a cathode, an electrolyte, and an anode comprising an active material, the active material comprising:
silicon particles; and
an additive comprising silosilazane wherein said silosilazane comprises one or more amine groups and one or more of: silyl chlorides, dialkylaminosilanes, and cyclic azasilanes.
2. The battery according to claim 1 , wherein the active material comprises a film with a thickness between 10 microns and 80 microns.
3. The battery according to claim 1 , wherein the active material is held together by a pyrolyzed carbon film.
4. The battery according to claim 1 , wherein the anode comprises lithium, sodium, potassium, silicon, and/or mixtures and combinations thereof.
5. The battery according to claim 1 , wherein the active material comprises a coating comprising one or more of: a metal oxide, a ceramic, and a polymer.
6. The battery according to claim 1 , wherein the electrolyte comprises a liquid, solid, or gel.
7. A method of forming a battery, the method comprising:
forming a battery comprising an anode, a cathode, and an electrolyte, the anode comprising a silicon-dominant active material that comprises silicon particles and an additive comprising silosilazane; wherein said silosilazane comprises one or more amine groups and one or more of: silyl chlorides, dialkylaminosilanes, and cyclic azasilanes.
8. The method according to claim 7 , wherein the silicon-dominant material is formed by coating a substrate with a slurry comprising a carbon binder, silicon particles, and silosilazane.
9. The method according to claim 7 , wherein the active material comprises a film with a thickness between 10 microns and 80 microns.
10. The method according to claim 7 , wherein the active material is held together by a pyrolyzed carbon material.
11. The method according to claim 7 , wherein the active material comprises a coating comprising one or more of: a metal oxide, a ceramic, and a polymer.
12. An anode for a battery, the anode comprising:
an active material on a conductive current collector, wherein the active material comprises:
silicon particles;
carbon; and
an additive comprising silosilazane; wherein said silosilazane comprises one or more amine groups and one or more of: silyl chlorides, dialkylaminosilanes, and cyclic azasilanes.