Beyond metal–air battery, emerging aqueous metal–hydrogen peroxide batteries with improved performance

Abstract The aqueous metal–H 2 O 2 batteries have been paid rapidly increasing attention due to their large theoretical energy densities, attractive power density, and multiple applications (air, land, and sea), especially in low‐content oxygen or nonoxygen conditions in which metal–air cells are out of work. However, the requirements of metal–H 2 O 2 batteries are different due to the order of metal activities (Mg > Al > Zn) as well as metal–air cells. Aqueous metal–H 2 O 2 batteries mainly include Al–H 2 O 2 , Mg–H 2 O 2 , and Zn–H 2 O 2 batteries with the respective scientific problems, including battery structures, single/dual‐electrolyte systems, electrocatalysts for O 2 reduction/evolution reactions, H 2 O 2 reduction/production/decomposition, and the designability of anode to inhibit self‐corrosion. In this review, we summarized battery architectures, possible mechanisms, and recent progress in metal–H 2 O 2 batteries, including Al–H 2 O 2 , Mg–H 2 O 2 , and Zn–H 2 O 2 batteries. Several perspectives are also provided for these research fields, which may be focused on in the future.