High-Energy-Density, Aqueous, Metal-Polyiodide Redox Flow Batteries

摘要

Improved metal-based redox flow batteries (RFBs) can utilize a metal and a divalent cation of the metal (M2+) as an active redox couple for a first electrode and electrolyte, respectively, in a first half-cell. For example, the metal can be Zn. The RFBs can also utilize a second electrolyte having I−, anions of Ix (for x≧3), or both in an aqueous solution, wherein the I− and the anions of Ix (for x≧3) compose an active redox couple in a second half-cell.

主权项

1. A redox flow battery (RFB) comprising:
a first electrolyte comprising divalent cations of a metal (M2+) in an aqueous solution and a first electrode comprising the metal (M), wherein M and M2+ compose a first active redox couple at a first half-cell; a second electrolyte comprising I−, anions of Ix (x≧3), or both in the aqueous solution, wherein I− and anions of Ix compose a second active redox couple at a second half-cell; and a membrane or separator between the first and second half-cells.