Treatment of carbon electrodes with TiCT MXene coating and thermal method for vanadium redox flow batteries: a comparative study.

One of the significant challenges of vanadium redox flow batteries is connected to the negative electrode where the main reaction of V(ii)/V(iii) and the side reaction of hydrogen evolution compete. To address this issue, we used titanium carbide (TiCT) MXene coating drop-casting to introduce oxygen functional groups and metals on the carbon electrode surface. Characterization through scanning electron microscopy and X-ray photoelectron spectroscopy confirmed the even distribution of TiCT MXene on the electrodes and the presence of titanium and termination groups (-O, -Cl, and -F).