# US 12,603,293 B2 · Method and system for silosilazanes, silosiloxanes, and siloxanes as additives for silicon dominant anodes

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,603,293 B2
- Document ID: US12603293B2
- Status: Granted
- Kind: B2
- Application number: 17/348,474
- Filed: 2021-06-15
- Published: 2021-10-07
- Granted: 2026-04-14
- Earliest claimed: 2019-12-05
- Assignees: Enevate Corporation
- Applicants: Enevate Corporation
- Inventors: Younes Ansari; Uday Kasavajjula; Benjamin Park; Monika Chhorng; Ambica Nair; Sanjaya Perera; David J. Lee
- Web page: https://patentgrep.com/patent/US12603293B2

## CPC

- H01M 4/628: {Inhibitors, e.g. gassing inhibitors, corrosion inhibitors}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 4/134: Electrodes based on metals, Si or alloys
- H01M 4/1395: of electrodes based on metals, Si or alloys
- H01M 4/366: {as layered products}
- H01M 4/386: {Silicon or alloys based on silicon}
- H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines}
- H01M 4/621: {Binders}
- H01M 4/622: {being polymers}
- H01M 4/625: {Carbon or graphite}
- H01M 2004/027: {Negative electrodes}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

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, polysilosilazane, silicon oxycarbides, and polyorganosiloxane. 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.

## Claims

### Claim 1

A battery comprising:
a cathode, an electrolyte, and an anode comprising a film, the film comprising:
a binder and
an active material, the active material comprising:
silicon particles and
an additive comprising polysilosilazane;
wherein said polysilosilazane contains Si—C bonds and a dialkylaminosilane;
wherein said film has a thickness between 10 and 80 microns; and
wherein said film is formed from a slurry comprising said binder and said active material.

### Claim 2 (depends on 1)

The battery according to claim 1, wherein the film has a conductivity of 1 S/cm or more.

### Claim 3 (depends on 1)

The battery according to claim 1, wherein the active material comprises between 50% and 95% silicon particles by weight.

### Claim 4 (depends on 1)

The battery according to claim 1, wherein the active material is held together by a pyrolyzed carbon film formed from said binder.

### Claim 5 (depends on 1)

The battery according to claim 1, wherein the anode comprises lithium, sodium, potassium, silicon, and/or mixtures and combinations thereof.

### Claim 6 (depends on 1)

The battery according to claim 1, wherein the electrolyte comprises a liquid, solid, or gel.

### Claim 7 (depends on 1)

The battery according to claim 1, wherein said additive further comprises silicon oxycarbides, polyorganosiloxane or both.

### Claim 8

A method of forming a battery:
wherein said battery comprises an anode, a cathode, and an electrolyte, the anode comprising a film; the film comprising a binder and
an active material, the active material comprising:
silicon particles and an additive;
wherein said additive comprises polysilosilazane;
wherein said polysilosilazane contains Si—C bonds and a dialkylaminosilane;
wherein said film has a thickness between 10 and 80 microns that is coated on a substrate;
the method comprising:
forming a slurry comprising said binder and said active material; and
forming said film by coating said substrate with said slurry.

### Claim 9 (depends on 8)

The method according to claim 8, wherein the film has a conductivity of 1 S/cm or more.

### Claim 10 (depends on 8)

The method according to claim 8, wherein the active material comprises between 50% and 95% silicon particles by weight.

### Claim 11 (depends on 8)

The method according to claim 8, wherein the active material is held together by a pyrolyzed carbon film formed from said binder.

### Claim 12 (depends on 8)

The method according to claim 8, wherein the anode comprises lithium, sodium, potassium, silicon, and/or mixtures and combinations thereof.

### Claim 13 (depends on 8)

The method according to claim 8, wherein the electrolyte comprises a liquid, solid, or gel.

### Claim 14 (depends on 8)

The method according to claim 8, wherein said additive further comprises silicon oxycarbides, polyorganosiloxane or both.

### Claim 15

An anode for a battery, the anode comprising:
film, the film comprising:
a binder and
an active material, the active material comprising:
silicon particles and
an additive comprising polysilosilazane;
wherein said polysilosilazane contains Si—C bonds and a dialkylaminosilane;
wherein said film has a thickness between 10 and 80 microns; and
wherein said film is formed from a slurry comprising said binder and said active material.

### Claim 16 (depends on 15)

The anode according to claim 15, wherein said additive further comprises silicon oxycarbides, polyorganosiloxane or both.