High-performance Cu0.95V2O5 nanoflowers as cathode materials for aqueous zinc-ion batteries
Exploring high-performance cathode materials for aqueous zinc ion batteries (ZIBs) is still one of the critical issues.Copper vanadate compound has become a potential cath-ode material for ZIBs with a novel displacement reaction mechanism of reversible reduction/oxidation of Cu2+/Cu0.Herein,we reported Cu0.95V2O5 nanoflowers prepared using a hydrothermal synthesis method as a capable cath-ode material for ZIBs.The Cu0.95V2O5 nanoflowers exhibit high specific capacity of 405 mAh·g-1 at the current den-sity of 100 mA·g-1,benefiting from the displacement reaction mechanism and phase transformation mechanism from Cu0.95V2O5 to the open and stable architecture Cu0.4V2O5 and Zn3(OH)2V2O7·2H2O phase.The cathode exhibits excellent rate performance with a high capacity of ~ 200 mAh·g-1 at 5 A·g-1 and outstanding cycle sta-bility with a capacity retention of 92% after 1000 cycles.It is anticipated that the novel Cu0.95V2O5 nanoflowers are promising cathode material in the application for zinc ion batteries.
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2022-03-25(万方平台首次上网日期,不代表论文的发表时间)
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