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US 10,873,090 B2Granted
Reduced-area current collectors for rechargeable batteries
AssigneeResearch Foundation of the City University of New York
InventorsYasumasa Ito, Sanjoy Banerjee
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Abstract
A novel electrode current collector design that can improve performance and extend cycle life for rechargeable batteries based on metal electrodeposition is disclosed. The novel electrode current collector has a reduced effective surface area that can help to balance efficiencies between battery electrodes and to ensure non-uniform electrodeposition of metal onto the anode current collector during charge. One result is mitigation of internal short circuits that can cause a battery to fail prematurely.
Claims15
A rechargeable battery, comprising:
- a cathode, the cathode having a first overall surface area and a first effective surface area;
- an anode current collector, the anode current collector having a second overall surface area and a second effective surface area;
- and
- an electrolyte in ionic communication with both the cathode and the anode current collector;
- wherein the second effective surface area is between 10 and 90% of the first effective surface area;
- and
- wherein the anode current collector has one or more regions that are coated to prevent electrodeposition of metals.
4 more elements
Dependencies are inferred from the claim text.