Divided energy electrochemical cell systems and methods of producing the same
View Patent ↗Embodiments described herein relate to divided energy electrochemical cells and electrochemical cell systems. Divided energy electrochemical cells and electrochemical cell systems include a first electrochemical cell and a second electrochemical cell connected in parallel. Both electrochemical cells include a cathode disposed on a cathode current collector, an anode disposed on an anode current collector, and a separator disposed between the anode and the cathode. In some embodiments, the first electrochemical cell can have different performance properties from the second electrochemical cell. For example, the first electrochemical cell can have a high energy density while the second electrochemical cell can have a high power density. In some embodiments, the first electrochemical cell can have a battery chemistry, thickness, or any other physical/chemical property different from those properties of the second electrochemical cell.
1. An electrochemical cell system, comprising:
a pouch including a first portion and a second portion;
a first anode current collector disposed on the first portion of the pouch;
a second anode current collector disposed on the second portion of the pouch, edges of the first portion coupled to corresponding edges of the second portion to form a sealing region;
a first anode and a second anode, the first anode disposed on the first anode current collector and the second anode disposed on the second anode current collector;
a cathode current collector;
a first cathode and a second cathode, at least one of the first cathode and the second cathode disposed on the cathode current collector; and
a first ion-permeable material and a second ion-permeable material, the first ion-permeable material disposed between the first anode and the first cathode, the second ion-permeable material disposed between the second anode and the second cathode, edges of the first ion-permeable material and the second ion-permeable material extending at least partially into the sealing region to be captured in the sealing region,
wherein the first cathode has a thickness greater than a thickness of the second cathode by a factor of at least about 1.5.
2. The electrochemical cell system of claim 1 , wherein the first cathode includes a semi-solid cathode material.
3. The electrochemical cell system of claim 1 , wherein the first anode includes a semi-solid anode material.
4. The electrochemical cell system of claim 1 , wherein the first cathode and the second cathode are disposed on the cathode current collector.
5. The electrochemical cell system of claim 1 , wherein the cathode current collector is a first cathode current collector, the electrochemical cell system further comprising a second cathode current collector, wherein the first cathode is disposed on the first cathode current collector and the second cathode is disposed on the second cathode current collector.
6. The electrochemical cell system of claim 5 , wherein:
the first anode current collector is disposed onto a first portion of a first pouch;
the first cathode current collector is disposed onto a second portion of the first pouch;
the second anode current collector is disposed onto a first portion of a second pouch; and
the second cathode current collector is disposed onto a second portion of the second pouch.
7. The electrochemical cell system of claim 1 , wherein at least one of the first cathode or the second cathode includes lithium cobalt oxide (LCO), lithium nickel manganese cobalt oxide (NMC), and/or lithium iron phosphate (LFP).
8. The electrochemical cell system of claim 1 , wherein at least one of the first anode or the second anode includes graphite, lithium metal (Li), sodium metal (Na), silicon oxide (SiO), graphite, silicon, carbon, lithium-intercalated carbon, lithium nitrides, a lithium alloy, and/or a lithium alloy forming compound.
9. The electrochemical cell system of claim 8 , wherein the lithium alloy forming compound includes silicon, bismuth, boron, gallium, indium, zinc, tin, antimony, aluminum, titanium oxide, molybdenum, germanium, manganese, niobium, vanadium, tantalum, gold, platinum, iron, copper, chromium, nickel, cobalt, zirconium, yttrium, molybdenum oxide, germanium oxide, silicon carbide, and/or a silicon-graphite composite.
10. The electrochemical cell system of claim 1 , wherein the first cathode has the same chemical composition as that of the second cathode.
11. The electrochemical cell system of claim 1 , wherein the first cathode has a chemical composition different from that of the second cathode.
12. An electrochemical cell system, comprising:
a pouch including a first portion and a second portion;
a first current collector;
a first electrode material disposed on a first side of the first current collector;
a second electrode material disposed on a second side of the first current collector, the second side of the first current collector opposite the first side;
a third electrode material disposed on a second current collector that is disposed on the first portion of the pouch;
a fourth electrode material disposed on a third current collector that is disposed on the second portion of the pouch, edges of the first portion of the pouch coupled to corresponding edges of the second portion of the pouch to form a sealing region;
a first ion-permeable material disposed between the first electrode material and the third electrode material to form a first electrochemical cell; and
a second ion-permeable material disposed between the second electrode material and the fourth electrode material to form a second electrochemical cell, the second electrochemical cell having an operating parameter that is different than a corresponding operating parameter of the first electrochemical cell, and edges of the first ion-permeable material and the second ion-permeable material extending at least partially into the sealing region to be captured in the sealing region.
13. The electrochemical cell system of claim 12 , wherein at least one of the first electrode material, the second electrode material, the third electrode material, or the fourth electrode material includes a semi-solid electrode material.
14. The electrochemical cell system of claim 12 , wherein the first electrochemical cell has a different chemical composition from that of the second electrochemical cell.
15. The electrochemical cell system of claim 12 , wherein:
the operating parameter includes an internal resistance, and
the internal resistance of the second electrochemical cell is greater than the internal resistance of the first electrochemical cell such that the electrochemical cell system has self-heating properties.
16. The electrochemical cell system of claim 12 , wherein:
the operating parameter includes a thickness, and
the thickness of the second electrochemical cell is greater than the thickness of the first electrochemical cell by a factor of at least about 1.5.
17. The electrochemical cell system of claim 12 , wherein:
the operating parameter includes a power density, and
the power density of the first electrochemical cell is greater than the power density of the second electrochemical cell.
18. The electrochemical cell system of claim 12 , wherein edges of the first current collector extend at least partially into the sealing region between edges of the first ion-permeable material and the second ion-permeable material to fluidically isolate the first electrochemical cell from the second electrochemical cell.
19. An electrochemical cell system, comprising:
a first anode current collector coupled to a first portion of a pouch;
a second anode current collector coupled to a second portion of the pouch, edges of the first portion coupled to corresponding edges of the second portion to form a sealing region;
a first anode and a second anode, the first anode disposed on the first anode current collector and the second anode disposed on the second anode current collector;
a cathode current collector;
a first cathode and a second cathode, at least one of the first cathode and the second cathode disposed on the cathode current collector; and
a first separator and a second separator, the first separator disposed between the first anode and the first cathode, the second separator disposed between the second anode and the second cathode, edges of the first separator and the second separator extending at least partially into the sealing region to be captured in the sealing region; and
a first anode tab coupled to the first anode current collector, a second anode tab coupled to the second anode current collector, and a cathode tab coupled to the cathode current collector, the first and second anode tabs extending through a first side of the sealing, and the cathode tab extending through a second side of the sealing region opposite the first side.
20. The electrochemical cell system of claim 19 , wherein edges of the cathode collector extend at least partially into the sealing region between edges of the first separator and the second separator to fluidically isolate the first cathode from the second cathode.
21. The electrochemical cell system of claim 20 , wherein the first cathode includes a first electrolyte and the second cathode includes a second electrolyte different from the first electrolyte.
22. The electrochemical cell system of claim 19 , wherein:
the first anode has a thickness greater than a thickness of the second anode by a factor of at least about 1.5, and/or
the first cathode has a thickness greater than a thickness of the second by a factor of at least about 1.5.
23. The electrochemical cell system of claim 19 , wherein the first cathode has a chemical composition different from the second cathode.
24. The electrochemical cell system of claim 19 , wherein at least one of the first cathode or the second cathode includes a semi-solid cathode.
25. The electrochemical cell system of claim 24 , wherein at least one of the first semi-solid cathode or the second semi-solid cathode includes lithium cobalt oxide (LCO), lithium nickel manganese cobalt oxide (NMC), and/or lithium iron phosphate (LFP).
26. The electrochemical cell system of claim 25 , wherein the first cathode and the second cathode are disposed on the cathode current collector.
27. The electrochemical cell system of claim 19 , wherein;
the cathode current collector is a first cathode current collector,
the electrochemical cell system further comprising a second cathode current collector, and
the first cathode is disposed on the first cathode current collector and the second cathode is disposed on the second cathode current collector.
28. The electrochemical cell system of claim 19 , wherein at least one of the first anode or the second anode includes graphite, lithium metal (Li), sodium metal (Na), silicon oxide (SiO), graphite, silicon, carbon, lithium-intercalated carbon, lithium nitrides, a lithium alloy, and/or a lithium alloy forming compound.