Reduced-Area Current Collectors for Rechargeable Batteries

摘要

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.

主权项

1. 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 about 10 and 90% of the first effective surface area.