A novel synthesis of V sub(10)O sub(24).10H sub(2)O nanoribbons and their capacitive properties in aqueous electrolytes

V sub(10)O sub(24).10H sub(2)O nanoribbons were synthesized by a simple, rapid and high-yield route with starting from cheap V sub(2)O sub(5) and glucose, and their capacitive properties were firstly investigated. The as-prepared samples were characterized by XRD, XPS, TG and SEM. The effect of various factors (such as aqueous electrolyte, working voltage and current density) on the capacitive behavior of V sub(10)O sub(24).10H sub(2)O electrode was analyzed by cyclic voltammetry and galvanostatic charge/discharge test. The best capacitive properties were achieved in 1 M KNO sub(3) solution at the working voltage of -0.3 to 0.7 V. The highest initial specific capacitance was 177.5 F g super(-1) at the current density of 200 mA g super(-1). The capacity retention was 93.2% or 85.3% after 1000 or 2000 cycles. Furthermore, the cyclic stability of V sub(10)O sub(24).10H sub(2)O was excellent at the high current density of 800 mA g super(-1).