Aqueous batteries are an emerging next-generation technology for large-scale energy storage.Among various metal-ion systems,manganese-based batteries have attracted significant interest due to their superior theoretic...Aqueous batteries are an emerging next-generation technology for large-scale energy storage.Among various metal-ion systems,manganese-based batteries have attracted significant interest due to their superior theoretical energy density over zinc-based battery systems.This study demonstrates oxygen vacancy-engineered vanadium oxide(V_(2)O_(4.85))as a high-performance cathode material for aqueous manganese metal batteries.The V_(2)O_(4.85) cathode had a discharge capacity of 212.6 mAh g^(-1) at 0.1 A g^(-1),retaining 89.5%capacity after 500 cycles.Oxygen vacancies enhanced ion diffusion and reduced migration barriers,facilitating both Mn^(2+)and H^(+)ion intercalation.Proton intercalation dominated charge storage,forming Mn(OH)_(2) layers,whereas Mn^(2+)contributed to surface-limited reactions.Furthermore,manganese metal batteries had a significantly higher operating voltage than that of aqueous zinc battery systems.Despite challenges with hydrogen evolution reactions at the Mn metal anode,this study underscores the potential of manganese batteries for future energy storage systems.展开更多
基金supported by the Global Joint Research Program funded by Pukyong National University(202411790001)supported by the Nano&Material Technology Development Program through the National Research Foundation of Korea(NRF),funded by the Ministry of Science and ICT(RS-2024-00446825)by the Technology Innovation Program(RS-2024-00418815)funded by the Ministry of Trade,Industry&Energy(MOTIE,Korea).
文摘Aqueous batteries are an emerging next-generation technology for large-scale energy storage.Among various metal-ion systems,manganese-based batteries have attracted significant interest due to their superior theoretical energy density over zinc-based battery systems.This study demonstrates oxygen vacancy-engineered vanadium oxide(V_(2)O_(4.85))as a high-performance cathode material for aqueous manganese metal batteries.The V_(2)O_(4.85) cathode had a discharge capacity of 212.6 mAh g^(-1) at 0.1 A g^(-1),retaining 89.5%capacity after 500 cycles.Oxygen vacancies enhanced ion diffusion and reduced migration barriers,facilitating both Mn^(2+)and H^(+)ion intercalation.Proton intercalation dominated charge storage,forming Mn(OH)_(2) layers,whereas Mn^(2+)contributed to surface-limited reactions.Furthermore,manganese metal batteries had a significantly higher operating voltage than that of aqueous zinc battery systems.Despite challenges with hydrogen evolution reactions at the Mn metal anode,this study underscores the potential of manganese batteries for future energy storage systems.
