Semi-solid electrodes with a polymer additive
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.
1. A semi-solid electrode, comprising:
about 20% to about 75% by volume of an active material; and
about 20% to about 70% by volume of an electrolyte, the electrolyte including about 0.01% to 1.5% by weight of an additive formulated to modify the rheology of the semi-solid electrode,
wherein a total additive content in the electrolyte is less than or equal to 1.5% by weight; and
wherein the semi-solid electrode does not include a binder.
2. The semi-solid electrode of claim 1 , wherein the electrolyte includes about 0.1% to about 1.25% by weight of the additive.
3. The semi-solid electrode of claim 2 , wherein the electrolyte includes about 0.1% to about 1% by weight of the additive.
4. The semi-solid electrode of claim 3 , wherein the electrolyte includes about 0.1% to about 0.7% by weight of the additive.
5. The semi-solid electrode of claim 4 , wherein the electrolyte includes about 0.1% to about 0.5% by weight of the additive.
6. The semi-solid electrode of claim 5 , wherein the electrolyte includes about 0.1% to about 0.3% by weight of the additive.
7. The semi-solid electrode of claim 1 , wherein the 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 dimethyl ether), 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, polyoxyphenazine, 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;
0% 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 an additive formulated to modify the rheology of the semi-solid electrode,
wherein a total additive content in the electrolyte is less than or equal to 1.5% by weight; and
wherein the semi-solid electrode does not include a binder.
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 additive.
15. The semi-solid electrode of claim 12 , wherein the 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, polyoxyphenazine, 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.
16. 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 an additive formulated to modify the rheology of the semi-solid electrode,
wherein a total additive content in the electrolyte is less than or equal to 1.5% by weight; and
wherein the semi-solid electrode does not include a binder.
17. The semi-solid electrode of claim 16 , wherein the semi-solid electrode further includes about 1% to about 30% by volume of a high capacity material.
18. The semi-solid electrode of claim 16 , wherein the electrolyte includes about 0.1% to about 1% by weight of the additive.
19. The semi-solid electrode of claim 16 , wherein the 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, polyoxyphenazine, 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.
20. The semi-solid electrode of claim 16 , wherein the semi-solid electrode is cured for at least 24 hours.
21. The semi-solid electrode of claim 1 , further comprising:
a conductive material.