Method and system for all-conductive battery electrodes
Systems and methods for all-conductive battery electrodes may include an electrode coating layer on a current collector, where the electrode coating layer comprises more than 50% silicon, and where each material in the electrode has a resistivity of less than 100 Ω-cm. The silicon may have a resistivity of less than 10 Ω-cm, less than 1 Ω-cm, or less than 1 mΩ-cm. The electrode coating layer may comprise pyrolyzed carbon and/or conductive additives. The current collector comprises a metal foil. The metal current collector may comprise one or more of a copper, tungsten, stainless steel, and nickel foil in electrical contact with the electrode coating layer. The electrode coating layer comprises more than 70% silicon. The electrode may be in electrical and physical contact with an electrolyte. The electrolyte may comprise a liquid, solid, or gel. The battery electrode may be in a lithium ion battery.
1. An all-conductive battery electrode, comprising:
a current collector; and
an electrode coating layer on the current collector,
wherein the electrode coating layer comprises a pyrolyzed binder material and more than 50% silicon,
wherein a resistivity of the pyrolyzed binder material is less than 100 Ω-cm, and
wherein a resistivity of the more than 50% silicon in the electrode coating layer is less than 100 Ω-cm.
2. The battery electrode according to claim 1 , wherein:
the resistivity of the pyrolyzed binder material is less than 10 Ω-cm; and
the resistivity of the more than 50% silicon in the electrode coating layer is less than 10 Ω-cm.
3. The battery electrode according to claim 1 , wherein:
the resistivity of the pyrolyzed binder material is less than 1 Ω-cm; and
the resistivity of the more than 50% silicon in the electrode coating layer is less than 1 Ω-cm.
4. The battery electrode according to claim 1 , wherein:
the resistivity of the pyrolyzed binder material is less than 1 mΩ-cm; and
the resistivity of the more than 50% silicon in the electrode coating layer is less than 1 mΩ-cm.
5. The battery electrode according to claim 1 , wherein the pyrolyzed binder material comprises pyrolyzed carbon.
6. The battery electrode according to claim 1 , wherein the electrode coating layer comprises conductive additives.
7. The battery electrode according to claim 1 , wherein the current collector comprises a metal foil.
8. The battery electrode according to claim 1 , wherein the current collector comprises one or more of a copper, tungsten, stainless steel, and nickel foil in electrical contact with the electrode coating layer.
9. The battery electrode according to claim 1 , wherein the electrode coating layer comprises more than 70% silicon.
10. A battery, the battery comprising:
a cathode, a separator, an electrolyte, and an all-conductive anode,
wherein the anode comprises a current collector and an electrode coating layer on the current collector,
wherein the electrode coating layer comprises a pyrolyzed binder material, conductive additives, and more than 50% silicon,
wherein a resistivity of the pyrolyzed binder material is less than 100 Ω-cm, and
wherein a resistivity of the more than 50% silicon is less than 100 Ω-cm.
11. The battery according to claim 10 , wherein the electrode is in electrical and physical contact with the electrolyte.
12. The battery according to claim 11 , wherein the electrolyte comprises a liquid, solid, or gel.
13. The battery according to claim 10 , wherein the battery is in a lithium ion battery.
14. A method of forming an all-conductive battery electrode, the method comprising:
coating a current collector with a slurry comprising silicon and a binder material; and
pyrolzying the slurry to form an electrode coating layer on the current collector,
wherein the electrode coating layer comprises pyrolyzed binder material and more than 50% silicon,
wherein a resistivity of the pyrolyzed binder material is less than 100 Ω-cm, and
wherein a resistivity of the more than 50% silicon is less than 100 Ω-cm.
15. The method according to claim 14 , wherein:
the resistivity of the pyrolyzed binder material is less than 10 Ω-cm, and
the resistivity of the more than 50% silicon is less than 10 Ω-cm.
16. The method according to claim 14 , wherein:
the resistivity of the pyrolyzed binder material is less than 1 Ω-cm, and
the resistivity of the more than 50% silicon is less than 1 Ω-cm.
17. The method according to claim 14 , wherein:
the resistivity of the pyrolyzed binder material is less than 1 mΩ-cm, and
the resistivity of the more than 50% silicon is less than 1 mΩ-cm.
18. The method according to claim 14 , wherein the pyrolyzed binder material comprises pyrolyzed carbon.
19. The method according to claim 14 , wherein the electrode coating layer comprises conductive additives.
20. The method according to claim 14 , wherein the current collector comprises a metal foil.
21. The method according to claim 14 , wherein the current collector comprises one or more of a copper, tungsten, stainless steel, or nickel foil in electrical contact with the electrode coating layer.
22. The method according to claim 14 , wherein the electrode coating layer comprises more than 70% silicon.
23. The method according to claim 14 , further comprising:
forming an electrode of a battery from the electrode coating layer and the current collector; and
placing the electrode in electrical and physical contact with an electrolyte, wherein the electrolyte comprises a liquid, solid, or gel.
24. The method according to claim 14 , further comprising:
forming an electrode from the electrode coating layer and the current collector; and
placing the electrode in a lithium ion battery.