Method and system for water soluble weak acidic resins as carbon precursors for silicon-dominant anodes
Systems and methods for water soluble weak acidic resins as carbon precursors for silicon-dominant anodes may include an electrode coating layer on a current collector, where the electrode coating layer is formed from silicon and pyrolyzed water-soluble acidic polyamide imide as a primary resin carbon precursor. The electrode coating layer may include a pyrolyzed water-based acidic polymer solution additive. The polymer solution additive may include one or more of: polyacrylic acid (PAA) solution, poly (maleic acid, methyl methacrylate/methacrylic acid, butadiene/maleic acid) solutions, and water soluble polyacrylic acid. The electrode coating layer may include conductive additives. The current collector may include a metal foil, where the metal current collector includes one or more of a copper, tungsten, stainless steel, and nickel foil in electrical contact with the electrode coating layer. The electrode coating layer may be more than 70% silicon.
1. A method of forming an electrode, the method comprising:
fabricating a battery electrode comprising an electrode coating layer on a current collector, the electrode coating layer formed from silicon and a water-soluble polyamide imide functionalized with acidic groups as a primary resin carbon precursor;
and pyrolyzing said electrode coating layer by heating to 500-800° C. to form the battery electrode.
2. The method according to claim 1 , wherein the electrode coating layer further comprises a water-based acidic polymer solution additive.
3. The method according to claim 2 , wherein the polymer solution additive comprises one or more of: polyacrylic acid (PAA) solution, poly (maleic acid, methyl methacrylate/methacrylic acid, butadiene/maleic acid) solutions, and water soluble PAA.
4. The method according to claim 1 , wherein the electrode coating layer comprises conductive additives.
5. The method according to claim 1 , wherein the current collector comprises a metal foil.
6. The method according to claim 1 , wherein the metal current collector comprises one or more of a copper, tungsten, stainless steel, and nickel foil in electrical contact with the electrode coating layer.
7. The method according to claim 1 , wherein the electrode coating layer comprises more than 70% silicon by weight.
8. The method according to claim 1 , wherein the electrode is in electrical and physical contact with an electrolyte and the electrolyte comprises a liquid, solid, or gel.
9. The method according to claim 1 , wherein the battery electrode is in a lithium ion battery.