Carbon coated battery electrodes
View Patent ↗A method for forming a corrosion resistant electrode for a battery includes supplying an electrode for use in the battery and exposing the electrode to an environment including vaporized carbon. At least some of the carbon from the environment may be transferred to the electrode.
1. An electrode plate for a battery, comprising:
a current collector including lead;
a carbon film having a thickness of less than about 1 μm coating at least a portion of the current collector to form a substrate surface including an outer surface of the carbon film and any exposed surfaces of the current collector; and
a chemically active paste disposed on at least a portion of the substrate surface.
2. The electrode plate of claim 1 , wherein the current collector is configured to include a grid pattern having an array of crossing members that define a plurality of interstices.
3. The electrode plate of claim 1 , wherein the carbon film has a thickness of less than about 100 nm.
4. The electrode plate of claim 1 , wherein the carbon film covers substantially all surfaces of the current collector.
5. The electrode plate of claim 1 , wherein the carbon film includes vapor-deposited carbon.
6. The electrode plate of claim 1 , wherein the chemically active paste includes an oxide of lead.
7. The electrode plate of claim 1 , wherein the battery is a lead acid battery.
8. The electrode plate of claim 1 , wherein the carbon film includes at least some region having a graphitic structure.
9. The electrode plate of claim 1 , wherein the carbon film includes at least some region having an amorphous structure.
10. A battery comprising:
a housing;
a positive terminal and a negative terminal;
at least one cell disposed within the housing and including at least one positive plate and at least one negative plate immersed in an electrolytic solution;
wherein the at least one positive plate further includes
a lead-based current collector;
a carbon film having a thickness of less than about 1 μm coating at least a portion of the current collector to form a substrate surface including an outer surface of the carbon film and any exposed surfaces of the current collector; and
a chemically active paste disposed on at least a portion of the substrate surface.
11. The battery of claim 10 , wherein the current collector is configured to include a grid having an array of crossing members that define a plurality of interstices.
12. The battery of claim 10 , wherein the carbon film has an average thickness of less than about 100 nm.
13. The battery of claim 10 , wherein the chemically active paste includes an oxide of lead.
14. The battery of claim 10 , wherein the carbon film includes vapor-deposited carbon.
15. The battery of claim 10 , wherein the carbon film covers substantially all surfaces of the lead-based current collector.
16. The battery of claim 10 , wherein the carbon film includes at least some region having a graphitic structure.
17. The battery of claim 10 , wherein the carbon film includes at least some region having an amorphous structure.