Effect of gadolinium trioxide on anode performance of aluminum-air batteries

Abstract

The self-corrosion rate was analyzed by polarization, impedance, and constant current discharge tests, the anode energy density was calculated by continuous constant current discharge at a current density of 10-180mA/cm2, and the surface morphology of the electrode was analyzed by scanning electron microscope (SEM) to study the effect of Gd2O3 additives on the aluminum anode performance of aluminum-air batteries in alkaline solution. The positive corrosion potential shift of the polarization curve, the decrease of corrosion current, the decrease of R1 (charge transfer internal resistance) in impedance test, the decrease of hydrogen evolution rate, and the decrease of pitting pits in surface topography analysis showed that the addition of Gd2O3 particles to the pure aluminum anode affected the charge transfer on the anode surface, improved its corrosion resistance, and inhibited the occurrence of hydrogen evolution reaction. The addition of Gd2O3 to pure aluminum has a positive effect on the performance of the battery anode material, which makes the corrosion resistance of the anode material significantly improved, and the discharge is stable and uniform, which is more suitable as an anode material for aluminum-air batteries.