Confirming reversible Al3+ storage mechanism through intercalation of Al3+ into V2O5 nanowires in a rechargeable aluminum battery

Our findings demonstrate clearly for the first time that Al3+ can insert into the metal oxide reversibly through intercalation and phase transition reaction. The electrochemical insertion and extraction of Al3+ lead to redox of V2O5. Insertion and extraction of Al3+ in V2O5 nanowire result in structure change on the crystalized V2O5 nanowires. Amorphous layers and new phase form along the V2O5 nanowires' edge during electrochemical reaction.510