Electrochemical cells with electrode material coupled directly to film and methods of making the same
Embodiments described herein relate to electrochemical cells with one or more electrodes coupled directly to a film material, and methods of making the same. In some embodiments, an electrochemical cell includes a first electrode material disposed on a first current collector, wherein the first current collector is coupled to a first non-conductive film. In some embodiments, a first tab is coupled to the first current collector. The electrochemical cell further includes a second electrode material capable of taking up or releasing ions during operation of the electrochemical cell. The second electrode material is coupled directly to a second non-conductive film. A second tab is electronically coupled to the second electrode material. A separator is disposed between the first electrode material and the second electrode material. In some embodiments, the second tab can be coupled directly to the second electrode material.
1. An electrochemical cell, comprising:
a first electrode material disposed on a first current collector, the first current collector coupled to a first non-conductive film;
a first tab coupled to the first current collector;
a second electrode material capable of taking up or releasing ions during operation of the electrochemical cell, the second electrode material including a semi-solid material coupled directly to a second non-conductive film, the second non-conductive film including a first layer and a second layer;
a second tab electronically coupled to the second electrode material; and
a separator disposed between the first electrode material and the second electrode material.
2. The electrochemical cell of claim 1 , wherein the second electrode material is not coupled to a current collector.
3. The electrochemical cell of claim 1 , wherein the first non-conductive film is coupled to the second non-conductive film to create a pouch.
4. The electrochemical cell of claim 1 , wherein the second electrode material and the second tab are coupled to a second current collector.
5. The electrochemical cell of claim 4 , wherein the second current collector physically contacts less than about 3% of the total surface area of the second electrode material.
6. The electrochemical cell of claim 1 , wherein the electrochemical cell has a specific energy of at least about 300 Wh/kg.
7. The electrochemical cell of claim 1 , wherein the electrochemical cell has a cell specific energy of at least about 600 Wh/kg.
8. The electrochemical cell of claim 1 , wherein the first non-conductive film and/or the second non-conductive film includes at least one of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), nylon, high-density polyethylene (HDPE), oriented polypropylene (o-PP), polyvinyl chloride (PVC), polyimide (PI), polysulfone (PSU), cast polypropylene (c-PP), polyethylene (PE), ethylene vinylacetate (EVA), PET, Poly-vinyl acetate (PVA), polyamide (PA), acrylic adhesives, ultraviolet (UV)/electron beam (EB)/infrared (IR) curable resin, polyether ether ketone (PEEK), polyethylene naphthalate (PEN), polyethersulfone (PES), Polyimide, (PI), polyphenylene sulfide (PPS), and polyphenyleneoxide (PPO).
9. The electrochemical cell of claim 1 , wherein the first electrode material and/or the second electrode material includes a semi-solid, binderless electrode material.
10. An electrochemical cell, comprising:
an anode material coupled directly to a first non-conductive film, the anode material including a semi-solid material;
an anode table coupled directly to the anode;
a cathode material coupled to a cathode current collector, the cathode current collector coupled to a second non-conductive film;
a cathode tab coupled to the cathode current collector; and
a separator disposed between the anode material and the cathode material.
11. The electrochemical cell of claim 10 , wherein:
the anode material includes a first surface coupled to the first non-conductive film and a second surface coupled to the separator, with at least about 70% of the first surface contacting the first non-conductive film.
12. The electrochemical cell of claim 11 , wherein at least about 80% of the first surface contacts the first non-conductive film.
13. The electrochemical cell of claim 12 , wherein at least about 90% of the first surface contacts the first non-conductive film.
14. The electrochemical cell of claim 10 , wherein the first non-conductive film is coupled to the second non-conductive film to create a pouch.
15. The electrochemical cell of claim 10 , wherein the first non-conductive film and/or the second non-conductive film includes at least one of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), nylon, high-density polyethylene (HDPE), oriented polypropylene (o-PP), polyvinyl chloride (PVC), polyimide (PI), polysulfone (PSU), cast polypropylene (c-PP), polyethylene (PE), ethylene vinylacetate (EVA), PET, Poly-vinyl acetate (PVA), polyamide (PA), acrylic adhesives, ultraviolet (UV)/electron beam (EB)/infrared (IR) curable resin, polyether ether ketone (PEEK), polyethylene naphthalate (PEN), polyethersulfone (PES), Polyimide, (PI), polyphenylene sulfide (PPS), and polyphenyleneoxide (PPO).
16. A method of forming an electrochemical cell, the method comprising:
disposing a first electrode material onto a first current collector, the first current collector coupled to a first tab;
disposing the first current collector onto a first non-conductive film;
disposing a second electrode material directly onto a second non-conductive film, the second electrode material including a semi-solid material and capable of taking up or releasing ions during operation of the electrochemical cell;
electronically coupling a second tan to the second electrode material; and
disposing a separator between the first electrode material and the second electrode material.
17. The method of claim 16 , further comprising:
coupling the first non-conductive film to the second non-conductive film to form a pouch.
18. The method of claim 16 , further comprising:
coupling the second electrode material directly to a second current collector.
19. The method of claim 18 , wherein the second current collector physically contacts less than about 3% of the total surface area of the second electrode material.
20. The method of claim 16 , wherein disposing the second electrode material directly onto the second non-conductive film is via at least one of sputtering, vapor deposition, sol-gel, physical spray method, electric beam deposition, electrochemical deposition, atomic layer deposition (ALD), chemical vapor deposition (CVD), electric phoretic deposition (EPD), casting, electron beam-induced deposition (EBD), slot-die coating, gravure coating, or Langmuir-Blodgett film coating.
21. The method of claim 16 , wherein disposing the second electrode material directly onto the second non-conductive film is via a layer of material that can be activated to act as an adhesive under the application of heat, light, such as UV or IR, or mechanical or electrical perturbation, such as ultrasonic or acoustic wave, or radio frequency or microwave.
22. The method of claim 16 , wherein electronically coupling the second tab to the second electrode material is via at least one of mechanical compression, use of an electrically conductive paste, chemical joining, welding, brazing, soldering, or crimping.
23. The method of claim 1 , wherein the first layer is made of a first material and the second layer is made of a second material.
24. The method of claim 23 , wherein the first and second layers are made of same material.