Semi-solid electrodes with gel polymer additive

Patent metadata

Field	Value
Publication number	US-10122044-B2
Application number	US-201414336119-A
Country	US
Kind code	B2
Filing date	Jul 21, 2014
Priority date	Jul 19, 2013
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

Embodiments described herein relate generally to electrochemical cells having semi-solid electrodes that include a gel polymer additive such that the electrodes demonstrate longer cycle life while significantly retaining the electronic performance of the electrodes and the electrochemical cells formed therefrom. In some embodiments, a semi-solid electrode can include about 20% to about 75% by volume of an active material, about 0.5% to about 25% by volume of a conductive material, and about 20% to about 70% by volume of an electrolyte. The electrolyte further includes about 0.01% to about 1.5% by weight of a polymer additive. In some embodiments, the electrolyte can include about 0.1% to about 0.7% of the polymer additive.

First claim

The invention claimed is:

1. A semi-solid electrode, comprising:
about 20% to about 75% by volume of an active material;
about 0.5% to about 25% by volume of a conductive material; and
about 20% to about 70% by volume of an electrolyte, the electrolyte including
about 0.01% to 1.5% by weight of a polymer additive,
wherein a total polymer content in the electrolyte is less than or equal to 1.5% by weight, and
wherein the semi-solid electrode is a mixture of the active material, the conductive material and the electrolyte with the polymer additive.

2. The semi-solid electrode of claim 1 , wherein the electrolyte includes about 0.1% to about 1.25% by weight of the polymer additive.

3. The semi-solid electrode of claim 2 , wherein the electrolyte includes about 0.1% to about 1% by weight of the polymer additive.

4. The semi-solid electrode of claim 3 , wherein the electrolyte includes about 0.1% to about 0.7% by weight of the polymer additive.

5. The semi-solid electrode of claim 4 , wherein the electrolyte includes about 0.1% to about 0.5% by weight of the polymer additive.

6. The semi-solid electrode of claim 5 , wherein the electrolyte includes about 0.1% to about 0.3% by weight of the polymer additive.

7. The semi-solid electrode of claim 1 , wherein the polymer additive is a gel-polymer additive.

8. The semi-solid electrode of claim 7 , wherein the gel polymer additive includes at least one of a physically cross-linked gel polymer additive and a chemically cross-linked gel polymer additive.

9. The semi-solid electrode of claim 7 , wherein the gel polymer additive includes at least one of an acrylate group and a methacrylate group.

10. The semi-solid electrode of claim 1 , wherein the polymer additive is carboxy methyl cellulose.

11. The semi-solid electrode of claim 1 , wherein the polymer additive includes at least one of a poly(ethyleneglycol dimethacrylate), poly(ethyleneglycol diacrylate), poly(propyleneglycol dimethacrylate), poly(propyleneglycol diacrylate), and poly(methyl methacrylate) (PMMA), polyethylene glycol dimethacrylate, poly(acrylonitrile) (PAN), polyurethane (PU), poly(vinylidene difluoride) (PVdF), poly(ethylene oxide) (PEO), poly(propylene oxide) poly(ethyleneglycol dimethylether), poly(ethyleneglycol diethylether), poly[bis(methoxy ethoxyethoxide)-phosphazene], poly(dimethylsiloxane) (PDMS), polyacene, polydisulfide, polystyrene, polystyrene sulfonate, polypyrrole, polyaniline, polythiophene, polythione, polyvinyl pyridine (PVP), polyvinyl chloride (PVC), polyaniline, poly(3,4-ethylenedioxythiophene) (PEDOT), polypyrrole, polythiophene, poly(p-phenylene), poly(triphenylene), polyazulene, polyfluorene, polynaphtalene, polyanthracene, polyfuran, polycarbazole, tetrathiafulvalene-substituted polystyrene, ferrocene-substituted polyethylene, carbazole-substituted polyethylene, polyoxyphena zine, poly(heteroacene), poly[(4-styrenesulfonyl)(trifluoromethanesulfonyl)imide-co-methoxy-polyethyleneglycolacrylate] (Li[PSTFSI-co-MPEGA]), sulfonated poly(phenylene oxide) (PPO), N,N-dimethylacryl amide (DMAAm), and lithium 2-acrylamido-2-methyl-1-propane sulfonate (LiAMPS), Poly(lithium 2-Acrylamido-2-Methylpropanesulfonic Acid-Co-Vinyl Triethoxysilane), polyethyleneoxide(PEO)/poly(lithium sorbate), PEO/poly(lithium muconate), PEO/[poly(lithium sorbat)+BF 3 ], PEO copolymer, and PEO terpolymer poly.

12. A semi-solid electrode, comprising:
about 10% to about 75% by volume of an active material;
about 0.5% to about 20% by volume of a conductive material; and
about 20% to about 70% by volume of an electrolyte, the electrolyte including about 0.01% to 1.5% by weight of a polymer additive,
wherein a total polymer content in the electrolyte is less than or equal to 1.5% by weight, and
wherein the semi-solid electrode is a mixture of the active material, the conductive material and the electrolyte with the polymer additive.

13. The semi-solid electrode of claim 12 , wherein the semi-solid electrode further includes about 1% to about 30% by volume of a high capacity material.

14. The semi-solid electrode of claim 12 , wherein the electrolyte includes about 0.1% to about 1% by weight of the polymer additive.

15. The semi-solid electrode of claim 12 , wherein the polymer additive includes at least one of a poly(ethyleneglycol dimethacrylate), poly(ethyleneglycol diacrylate), poly(propyleneglycol dimethacrylate), poly(propyleneglycol diacrylate), and poly(methyl methacrylate) (PMMA), polyethylene glycol dimethacrylate, poly(acrylonitrile) (PAN), polyurethane (PU), poly(vinylidene difluoride) (PVdF), poly(ethylene oxide) (PEO), poly(propylene oxide) poly(ethyleneglycol dimethylether), poly(ethyleneglycol diethylether), poly[bis(methoxy ethoxyethoxide)-phosphazene], poly(dimethylsiloxane) (PDMS), polyacene, polydisulfide, polystyrene, polystyrene sulfonate, polypyrrole, polyaniline, polythiophene, polythione, polyvinyl pyridine (PVP), polyvinyl chloride (PVC), polyaniline, poly(3,4-ethylenedioxythiophene) (PEDOT), polypyrrole, polythiophene, poly(p-phenylene), poly(triphenylene), polyazulene, polyfluorene, polynaphtalene, polyanthracene, polyfuran, polycarbazole, tetrathiafulvalene-substituted polystyrene, ferrocene-substituted polyethylene, carbazole-substituted polyethylene, polyoxyphena zine, poly(heteroacene), poly[(4-styrenesulfonyl)(trifluoromethanesulfonyl)imide-co-methoxy-polyethyleneglycolacrylate] (Li[PSTFSI-co-MPEGA]), sulfonated poly(phenylene oxide) (PPO), N,N-dimethylacryl amide (DMAAm), and lithium 2-acrylamido-2-methyl-I-propane sulfonate (LiAMPS), Poly(lithium 2-Acrylamido-2-Methylpropanesulfonic Acid-Co-Vinyl Triethoxysilane), polyethyleneoxide(PEO)/poly(lithium sorbate), PEO/poly(lithium muconate), PEO/[poly(lithium sorbat)+BF 3 ], PEO copolymer, and PEO terpolymer poly.

16. The semi-solid electrode of claim 12 , wherein the polymer additive is a gel-polymer additive.

17. A semi-solid electrode, comprising:
an active material;
a conductive material; and
about 20% to about 70% by volume of an electrolyte, the electrolyte including about 0.01% to 1.5% by weight of a gel-polymer additive,
wherein a total polymer content in the electrolyte is less than or equal to 1.5% by weight, and
wherein the semi-solid electrode is a mixture of the active material, the conductive material and the electrolyte with the polymer additive.

18. The semi-solid electrode of claim 17 , wherein the semi-solid electrode further includes about 1% to about 30% by volume of a high capacity material.

19. The semi-solid electrode of claim 17 , wherein the electrolyte includes about 0.1% to about 1% by weight of the gel-polymer additive.

20. The semi-solid electrode of claim 17 , wherein the polymer additive includes at least one of a poly(ethyleneglycol dimethacrylate), poly(ethyleneglycol diacrylate), poly(propyleneglycol dimethacrylate), poly(propyleneglycol diacrylate), and poly(methyl methacrylate) (PMMA), polyethylene glycol dimethacrylate, poly(acrylonitrile) (PAN), polyurethane (PU), poly(vinylidene difluoride) (PVdF), poly(ethylene oxide) (PEO), poly(propylene oxide) poly(ethyleneglycol dimethylether), poly(ethyleneglycol diethylether), poly[bis(methoxy ethoxyethoxide)-phosphazene], poly(dimethylsiloxane) (PDMS), polyacene, polydisulfide, polystyrene, polystyrene sulfonate, polypyrrole, polyaniline, polythiophene, polythione, polyvinyl pyridine (PVP), polyvinyl chloride (PVC), polyaniline, poly(3,4-ethylenedioxythiophene) (PEDOT), polypyrrole, polythiophene, poly(p-phenylene), poly(triphenylene), polyazulene, polyfluorene,

Assignees

• 24M Technologies Inc

Inventors

• Tan Taison
• Ota Naoki
• Disko Jeffry

Classifications

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/058

  Construction or manufacture · CPC title

• H01M4/624

  Electric conductive fillers · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title