Effects of Ni2+ Doping on Structure and Electrochemical Performance of V2O5
Ni2+掺杂对V2O5结构及电化学性能的影响

Ni 2+ -doped V 2 O 5 cathode materials were synthesized by liquid deposition process with NiSO4·6H2O as dopant. The effects of Ni 2+ on the physical and chemical properties of the target compounds were investigated. The material structure, microphology and grain sizes were characterized by XRD and SEM. Galvanostatic method and AC impedance were used to measure the electrochemical performance of the material. The results show that the Ni 2+ doping affects the product structure slightly, and it is helpful to reduce the impedance of charge transfer in V2O5. With the increase of doping content, the capacitor specific energy increases. With the 2.5% Ni 2+ doping content, the highest specific energy of the capacitor is up to 15.6Wh·kg-1 and coulomb efficiency is 95.12%.