Sodium-Based Energy Storage Device Based on Surface-Driven Reactions

摘要

The performance of sodium-based energy storage devices can be improved according to methods and devices based on surface-driven reactions between sodium ions and functional groups attached to surfaces of the cathode. The cathode substrate, which includes a conductive material, can provide high electron conductivity while the surface functional groups can provide reaction sites to store sodium ions. During discharge cycles, sodium ions will bind to the surface functional groups. During charge cycles, the sodium ions will be released from the surface functional groups. The surface-driven reactions are preferred compared to intercalation reactions.

主权项

1. A method for operating a sodium-based energy storage cell comprising sodium ions, an anode, and a cathode comprising a substrate, the method comprising binding sodium ions to surface functional groups attached to surfaces of the substrate during discharge cycles and releasing sodium ions from the surface functional groups during charge cycles.