Nonaqueous Mg Flow Battery with a Polymer Catholyte

Abstract

Redox flow batteries (RFBs) are promising for the large-scale storage of renewable energies. Nonaqueous RFBs can achieve higher voltages and are more suitable for extreme environments than their aqueous counterparts. In this work, the first nonaqueous Mg flow battery with a polymer catholyte is reported, by integrating a Mg foil anode, and a porous membrane, with a polymer solution catholyte. The battery can deliver a voltage of 1.74 V, a capacity of 250 mAh/L, and a cycle life of 50 cycles. This work demonstrates the feasibility of Mg flow batteries and provides a unique direction for flow battery research.

Topics & Concepts