Herein, a facile solvothermal method is used to prepare a new polyanion-type sodium vanadyl fluorophosphate (Nax(VO)2(PO4)yFz) for aqueous hybrid sodium-zinc batteries. The novel cathode delivers superior performance, which includes a… Click to show full abstract
Herein, a facile solvothermal method is used to prepare a new polyanion-type sodium vanadyl fluorophosphate (Nax(VO)2(PO4)yFz) for aqueous hybrid sodium-zinc batteries. The novel cathode delivers superior performance, which includes a high specific capacity of 87.2 mA h g-1 at 0.05 A g-1, good rate capability of 41.5 mA h g-1 at 2 A g-1, and high capacity retention. Based on ex situ XRD and XPS results, the Na+/Zn2+ co-insertion mechanism is proposed.
               
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