IP Library Granted Patent US 11,978,894
Granted Patent B2
US 11,978,894 · App. 17/398,786 · Granted May 7, 2024

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 (Irvine, CA); Younes Ansari (Irvine, CA); Sanjaya D. Perera (Irvine, CA); Benjamin Park (Irvine, CA)
Assignee: Enevate Corporation
H01M4/386H01M4/0404H01M4/622H01M10/0525
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Quick Facts
Patent No.
US 11,978,894
App. No.
17/398,786
Granted
May 7, 2024
Kind
B2
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 (18)

1. A battery electrode, the electrode comprising a pyrolyzed electrode coating layer comprising from about 80 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(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(maleic anhydride-alt-1-octadecene); Polypropylene-graft-maleic anhydride; or Polyisoprene-graft-maleic anhydride;

and where the pyrolysis is carried out by heating to 500-800° C.; and

wherein said polymer binder further comprises a functional compound additive, wherein said functional compound additive comprises Putrescine, Spermidine, Spermine, Thermospermine, Polyethylenimine, Poly(ethylene glycol) diglycidyl ether, Trimethylolpropane triglycidyl ether, Tris(4-hydroxyphenyl)methane triglycidyl ether, Tris(2,3-epoxypropyl) isocyanurate, Poly[(o-cresyl glycidyl ether)-co-formaldehyde], Trimethylolpropane tris(3-mercaptopropionate), Pentaerythritol tetrakis(3-mercaptopropionate), 2,2′-(Ethylenedioxy)diethanethiol, 1,2-Ethanedithiol, or 1,4-Butanedithiol.

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 said polymer binder further comprises a functional compound additive, wherein said functional compound additive comprises Poly(acrylic acid), Poly(vinyl alcohol), Lignin, styrene-butadiene rubber, Gelatin, Carboxymethyl cellulose, Chitosan, Alginate, Pectin, Amylose, Starch, Xanthan gum, Arabic gum, Gelan gum, Karaya gum, and/or Guar gum.

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

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

creating a pyrolyzed electrode coating layer from an electrode slurry comprising an aqueous solution of a maleic anhydride- or maleic acid-containing polymer binder and about 80 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 by heating to 500-800° C.;

wherein said polymer binder comprises 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(maleic anhydride-alt-1-octadecene); Polypropylene-graft-maleic anhydride; or Polyisoprene-graft-maleic anhydride; and

wherein said polymer binder further comprises a functional compound additive, wherein said functional compound additive comprises Putrescine, Spermidine, Spermine, Thermospermine, Polyethylenimine, Poly(ethylene glycol) diglycidyl ether, Trimethylolpropane triglycidyl ether, Tris(4-hydroxyphenyl)methane triglycidyl ether, Tris(2,3-epoxypropyl) isocyanurate, Poly[(o-cresyl glycidyl ether)-co-formaldehyde], Trimethylolpropane tris(3-mercaptopropionate), Pentaerythritol tetrakis(3-mercaptopropionate), 2,2′-(Ethylenedioxy)diethanethiol, 1,2-Ethanedithiol, or 1,4-Butanedithiol.

7. The method according to claim 6 , wherein said polymer binder comprises a lithium salt of a maleic anhydride- or maleic acid-containing polymer.

8. The method according to claim 6 , 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-, three-dimensional carbon materials.

9. The method according to claim 6 , wherein said polymer binder further comprises a functional compound additive, wherein said functional compound additive comprises Poly(acrylic acid), Poly(vinyl alcohol), Lignin, styrene-butadiene rubber, Gelatin, Carboxymethyl cellulose, Chitosan, Alginate, Pectin, Amylose, Starch, Xanthan gum, Arabic gum, Gelan gum, Karaya gum, and/or Guar gum.

10. The method according to claim 6 , 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 Jan 9, 2024
From: JI, LIWEN; ANSARI, YOUNES; PERERA, SANJAYA D.; PARK, BENJAMIN
To: ENEVATE CORPORATION
Reel/Frame 066069/0308 →
Continuity (2)
Continuation 16925093 · Jul 9, 2020
Related Publication 20220013768A1 · Jan 13, 2022
Cited By (1)
US 12,586,784