Ordered WO nanorods: facile synthesis and their electrochemical properties for aluminum-ion batteries.

In this work, we have synthesized ordered WO nanorods via a facile hydrothermal process. And the series WO nanorods with oxygen vacancies are obtained via a subsequent thermal reduction process. The formation mechanisms of WO nanorods with different oxygen vacancies are proposed. And the electrochemical results reveal that the WO nanorods exhibit the improved specific capacity due to the oxygen vacancies caused by the thermal reduction. More importantly, the reaction mechanism of the WO nanorods as cathodes for aluminum-ion batteries has been proved.