IP Library Granted Patent US 11,114,660
Granted Patent B1
US 11,114,660 · App. 16/925,093 · Granted Sep 7, 2021

Silicon anodes with water-soluble maleic anhydride-, and/or maleic acid-containing polymers/copolymers, derivatives, and/or combinations (with or without additives) as binders

Inventors: Liwen Ji (San Diego, CA); Younes Ansari (Irvine, CA); Sanjaya D. Perera (Irvine, CA); Benjamin Park (Mission Viejo, CA)
Assignee: Enevate Corporation
H01M4/386H01M4/0404H01M4/622H01M10/0525
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Quick Facts
Patent No.
US 11,114,660
App. No.
16/925,093
Granted
Sep 7, 2021
Kind
B1
Abstract

Systems and methods for batteries comprising a cathode, an electrolyte, and an anode, wherein the anode is a Si-dominant anode that utilizes water-soluble maleic anhydride- and/or maleic acid-containing polymers/co-polymers, derivatives, and/or combinations (with or without additives) as binders.

Claims (17)

1. A battery electrode, the electrode comprising an electrode coating layer comprising from about 1 wt % to 95 wt % Si;

wherein said electrode coating layer further comprises a water-soluble maleic anhydride- or maleic acid-containing polymer binder; and wherein said polymer binder comprises Poly(methyl vinyl ether-alt-maleic anhydride); Poly(methyl vinyl ether-alt-maleic acid); Poly(styrene-alt-maleic acid) sodium salts; Poly(styrene-co-maleic acid), partial isobutyl esters; Poly(styrene-co-maleic acid), partial isobutyl/methyl mixed esters; Poly(styrene-alt-maleic anhydride), partial methyl esters; Poly(isobutylene-alt-maleic anhydride); Poly(maleic anhydride-alt-1-octadecene); Poly(ethylene-alt-maleic anhydride); Polyethylene-graft-maleic anhydride; Polypropylene-graft-maleic anhydride; Polyisoprene-graft-maleic anhydride; or Polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene-graft-maleic anhydride; and

wherein said polymer binder further comprises a functional compound additive, wherein said functional compound additive comprises cyclodextrin-based compounds or tannic acid.

2. The electrode according to claim 1 , wherein said polymer binder comprises a lithium salt of a maleic anhydride- or maleic acid-containing polymer.

3. The electrode according to claim 1 , wherein said polymer binder further comprises a conductive additive, wherein said conductive additive comprises Super P carbon black, graphite, graphene, carbon nanofibers, carbon fibers, carbon nanotubes, porous carbons and/or other types of zero-, one-, two-, or three-dimensional carbon materials.

4. The electrode according to claim 1 , wherein the electrode coating layer comprises more than 70% silicon.

5. The electrode according to claim 1 , wherein the battery electrode is in a lithium ion battery.

6. The electrode according to claim 1 , wherein the electrode coating layer is pyrolyzed.

7. A method of forming a battery electrode, the method comprising:

creating an electrode coating layer from an electrode slurry comprising an aqueous solution of a maleic anhydride- or maleic acid-containing polymer binder and about 1 wt % to 95 wt % Si powder, with optional additives;

fabricating a battery electrode by coating the slurry on a current collector; and

pyrolyzing said electrode coating layer; wherein said polymer binder comprises Poly(methyl vinyl ether-alt-maleic anhydride); Poly(methyl vinyl ether-alt-maleic acid); Poly(styrene-alt-maleic acid) sodium salts; Poly(styrene-co-maleic acid), partial isobutyl esters; Poly(styrene-co-maleic acid), partial isobutyl/methyl mixed esters; Poly(styrene-alt-maleic anhydride), partial methyl esters; Poly(isobutylene-alt-maleic anhydride); Poly(maleic anhydride-alt-1-octadecene); Poly(ethylene-alt-maleic anhydride); Polyethylene-graft-maleic anhydride; Polypropylene-graft-maleic anhydride; Polyisoprene-graft-maleic anhydride; or Polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene-graft-maleic anhydride; and

wherein said polymer binder further comprises a functional compound additive, wherein said functional compound additive comprises cyclodextrin-based compounds or tannic acid.

8. The method according to claim 7 , wherein said polymer binder comprises a lithium salt of a maleic anhydride- or maleic acid-containing polymer.

9. The method according to claim 7 , wherein said polymer binder further comprises a conductive additive, wherein said conductive additive comprises Super P carbon black, graphite, graphene, carbon nanofibers, carbon fibers, carbon nanotubes, porous carbons and/or other types of zero-, one-, two-, or three-dimensional carbon materials.

10. The method according to claim 7 , wherein the electrode coating layer comprises more than 70% silicon.

11. The method according to claim 7 , wherein the battery electrode is in a lithium ion battery.

Assignments (2)
SECURITY INTEREST Recorded Mar 10, 2026
From: ENEVATE CORPORATION
To: MCANDREWS, HELD & MALLOY LTD.
Reel/Frame 075093/0935 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 29, 2021
From: JI, LIWEN; ANSARI, YOUNES; PERERA, SANJAYA D.; PARK, BENJAMIN
To: ENEVATE CORPORATION
Reel/Frame 056087/0494 →
Cited By (3)
US 12,355,062 US 12,381,202 US 12,586,784