An aqueous rechargeable copper ammonium hybrid battery with good cycling performance
INORGANIC CHEMISTRY FRONTIERS(2024)
摘要
Hybrid aqueous rechargeable batteries have attracted broad attention due to their cost, safety, and environmental advantages. Nevertheless, a large proportion of the reported long-life and high-power performances are accomplished with a low mass-loading at the cathode (2 mg cm-2). To overcome this challenge, we propose an aqueous rechargeable copper ammonium hybrid battery, which includes an NH4+-rich copper hexacyanoferrate (N-CuHCF) cathode, a Cu foil anode and a hybrid aqueous electrolyte (1 M NH4+ + 0.1 M Cu2+). Its operation involves a reversible NH4+ insertion/extraction reaction at the cathode and Cu plating/stripping at the anode. The unique working mechanism enables this hybrid-ion battery to show a long-term lifespan (over 10 000 cycles). Moreover, this battery exhibits high specific capacity and a long-life property (1000 cycles) even with a high mass-loading (20 mg cm-2) of N-CuHCF at the cathode. This work assembles an aqueous rechargeable copper ammonium hybrid battery, which combines the merits of an NH4+-rich copper hexacyanoferrate (N-CuHCF) cathode and the high safety, high capacity, and abundant reserves of a Cu anode.
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