A new modification method for graphite felt electrodes in a MV/4-HO-TEMPO flow battery

Abstract

Using graphite felt as the support body, reduced graphene oxide (rGO) is grown on the surface of carbon fibers by the hydrothermal reduction method, and the modified graphite felt was used as an electrode material and studied in a methyl viologen (MV)/4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (4-HO-TEMPO) redox flow battery. This paper aims to solve the insufficient adhesion of the dip-coating method by simple, effective and low-cost means and provides a possibility for large-scale production and application; the new modification method increases the reaction area and performance of the electrode, resulting in high current density and improved battery performance, and in the current density of 60 mA cm⁻², the battery provides 97.39% theoretical capacity, which has practical significance for battery configurations.