Preparation of porous spheroidal V2O5/PEDOT water system zinc-ion battery electrode material
Porous spheroidal V2O5 and V2O5/PEDOT electrode materials were prepared by a simple hydrothermal synthesis method.The structures of the samples were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),and X-ray diffraction(XRD).After assembling their into zinc ion batteries,their electrochemical measurement were studied through testing methods such as cyclic voltammetry(CV)and galvanostatic charge/discharge(GCD).The result showed that V2O5/PEDOT electrode material had a discharge capacity of 359 mAh·g-1 at a current density of 0.1 A·g-1,which was higher than the V2O5 electrode material(160 mAh·g-1)under the same conditions.After 2 000 galvanostatic charge/discharge cycles at a current density of 5 A·g-1,the discharge capacity decreased from 147 mAh·g-1 to 142 mAh·g-1 with a capacity retention rate of 96.6%.The prepared V2O5/PEDOT electrode material had excellent electrochemical performance.