Synthesis and Zn Ion Storage Performance of Self-Supporting Vanadium Dioxide/Carbon Cloth Electrodes
Self-supporting VO 2/carbon cloth flexible electrodes(VO2@CC)with high mass loading(4～5 mg/cm-2)were successfully synthesized by hydrothermal method and subsequently used as the cathode for aqueous zinc ion batteries.The Zn//VO2@CC battery exhibits a high specific capacity of 296.1 mAh/g-1 at 0.1 A/g-1 and retains a specific capacity of 111 mAh/g-1 after 800 cycles at 4 A/g-1,showing a superior electrochemical performance.Additionally,the kinetics of zinc ion insertion/extraction was evaluated by electrochemical impedance spectroscopy(EIS)and galvanostatic intermittent titration technique(GITT),demonstrating that the Zn//VO2@CC battery has a small charge transfer resistance(29.04 Ω)as well as a fast Zn2+diffusion coefficient(～10-7 cm2 s-1).This work provides an alternative strategy for the devel-opment of cathode materials for aqueous zinc ion battery.
aqueous zinc ion batterycathodehigh mass loadingvanadium dioxidecarbon cloth
万方数据
维普
