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 . A battery electrode, comprising:
a current collector; and
an electrode coating layer on the current collector;
wherein the electrode coating layer comprises a binder material and an active material; and
wherein a difference in resistivity between the binder material and the active material is less than 100 Ω-cm.
2 . The battery electrode of claim 1 , wherein:
the resistivity of the binder material is less than 10 Ω-cm; and
the resistivity of the active material is less than 10 Ω-cm.
3 . The battery electrode of claim 1 , wherein:
the resistivity of the binder material is less than 1 Ω-cm; and
the resistivity of the active material is less than 1 Ω-cm.
4 . The battery electrode of claim 1 , wherein:
the resistivity of the binder material is less than 1 mΩ-cm; and
the resistivity of the active material is less than 1 mΩ-cm.
5 . The battery electrode of claim 1 , wherein the binder material comprises pyrolyzed carbon.
6 . The battery electrode of claim 1 , wherein the electrode coating layer comprises conductive additives.
7 . The battery electrode of claim 1 , wherein the current collector comprises a metal foil.
8 . The battery electrode of 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 . A method of forming a battery electrode, the method comprising:
mixing a binder material and an active material to form a slurry; and
forming, from the slurry, an electrode coating layer on a current collector;
wherein the electrode coating layer comprises the binder material and the active material; and
wherein a difference in resistivity between the binder material and the active material is less than 100 Ω-cm.
10 . The method of claim 9 , wherein:
the resistivity of the binder material is less than 10 Ω-cm; and
the resistivity of the active material is less than 10 Ω-cm.
11 . The method of claim 9 , wherein:
the resistivity of the binder material is less than 1 Ω-cm; and
the resistivity of the active material is less than 1 Ω-cm.
12 . The method of claim 9 , wherein:
the resistivity of the binder material is less than 1 mΩ-cm; and
the resistivity of the active material is less than 1 mΩ-cm.
13 . The method of claim 9 , wherein the binder material comprises pyrolyzed carbon.
14 . The method of claim 9 , wherein the electrode coating layer comprises conductive additives.
15 . The method of claim 9 , wherein the current collector comprises a metal foil.
16 . The method of claim 9 , 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.
17 . A battery, comprising:
a cathode, a separator, an electrolyte, and an anode;
wherein the anode comprises a current collector and an electrode coating layer on the current collector;
wherein the electrode coating layer comprises a binder material and an active material; and
wherein a difference in resistivity between the binder material and the active material is less than 100 Ω-cm.
18 . The battery of claim 17 , wherein:
the anode is in electrical and physical contact with the electrolyte; and
the electrolyte comprises a liquid, solid, or gel.
19 . The battery of claim 17 , wherein:
the resistivity of the binder material is less than 10 Ω-cm; and
the resistivity of the active material is less than 10 Ω-cm.
20 . The battery of claim 17 , wherein:
the resistivity of the binder material is less than 1 Ω-cm; and
the resistivity of the active material is less than 1 Ω-cm.
21 . The battery of claim 17 , wherein:
the resistivity of the binder material is less than 1 mΩ-cm; and
the resistivity of the active material is less than 1 mΩ-cm.
22 . The battery of claim 17 , wherein the binder material comprises pyrolyzed carbon.
23 . The battery of claim 17 , wherein the electrode coating layer comprises conductive additives.
24 . The battery of claim 17 , wherein the current collector comprises a metal foil.
25 . The battery of claim 17 , 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.