Beyond Metal--Air Battery, Emerging Aqueous Metal--Hydrogen Peroxide
Batteries with Improved Performance
Abstract
The aqueous metal-H2O2 batteries have been paying rapidly increasing
attention due to their large theoretical energy densities, high 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-H2O2 batteries are
different due to the order of metal activities
(Mg>Al>Zn) as well as metal-air cells. Aqueous
metal-H2O2 batteries mainly include Al-H2O2, Mg-H2O2, and Zn-H2O2
batteries with respective scientific problems, including battery
structures, single/dual-electrolyte systems, electrocatalysts for oxygen
reduction/evolution reactions and H2O2
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-H2O2
batteries including Al-H2O2, Mg-H2O2, and Zn-H2O2 batteries. Several
perspectives are also provided for these research fields, which may be
focused on in the future.