All solid state rechargeable aluminum-air battery with deep eutectic solvent based electrolyte and suppression of byproducts formation.

In order to create a rechargeable aluminum (Al)-air battery, an aluminum-air battery with a deep eutectic solvent-based solid electrolyte was prepared. The prepared battery demonstrated a capacity smaller than the theoretical value although we observed stable electrochemical reactions. When TiN was used as an air cathode material, byproducts of the aluminum-air battery such as Al(OH) and AlO were not detected on either the Al anode nor the air cathode. Even though we did not detect byproducts, we observed NaCl and NHCl phases on the air cathode, and they did not hinder the electrochemical reaction.