The emerging aqueous zinc ion batteries (ZIBs) are one of the alternatives to lithium ion batteries (LIBs) because zinc electrode possesses low equilibrium potential, high exchange current density and high hydrogen evolution overpotential. Nevertheless, they are still challenging on improving the cycle stability and compatibility with electrolytes. Herein, we report VO₂-5@ PPy hollow nanospheres consisting of many nanosheets as cathode materials for ZIBs. The spaces between nanospheres facilitate transmission of Zn ions and make electrode tolerate high volume change. The as-obtained material delivers a specific capacity of 440 mAh g⁻¹ at 0.1 A g⁻¹. Also, they remain a reversible capacity of 143 mAh g⁻¹ after 860 cycles at 1 A g⁻¹.

新兴的水性锌离子电池（ZIBs）是锂离子电池（LIBs）的替代产品之一，因为锌电极具有低平衡电位，高交换电流密度和高氢气释放超电势。然而，它们在改善循环稳定性和与电解质的相容性方面仍具有挑战性。在此，我们报道了由许多纳米片组成的VO ₂ -5 @ PPy空心纳米球作为ZIBs的阴极材料。纳米球之间的空间有助于Zn离子的传输，并使电极可以承受较大的体积变化。所获得的材料在0.1 A g ^-1下提供了440 mAh g ^-1的比容量。此外，它们在1 A g下经过860次循环后仍保持143 mAh g ^-1的可逆容量。^-1。