In this study

electrochemical performance of titanium-trichloride-hydrochloride acid aqueous solution was investiageted. Cyclic voltammetry(CV)

electrochemical impedance Spectroscopy (EIS) and potentiodynamic polarization curve tests were applied to study the electrochemical dynamics of Ti3+/Ti2+ such as reversibility and intrinsic mechanism at various temperatures. The CV results show that the oxide and reduce peak currents of Ti3+/Ti2+ couples increase with increasing temperature and the electrochemical reversibility become better as well. The EIS measured data were simulated by the LRs(Q(RctW)) equivalent circuit model

and the results indicate that reaction impedance reduced sharply from 4.192 W ·cm2 to 0.5321 W·cm2 with the temperature increasing from 10℃ to 40℃. The potentiodynamic polarization curve results show the equilibrium potential shifted towards positively promoting negative electrolyte alternative for titanium based redox flow battery.