Preparation and ion transport properties of ambient pressure dried vanadium pentoxide aerogels as lithium battery cathode materials

Ambient pressure dried V₂O₅ aerogels were prepared from VO（OC₃H₇）₃、acetone and H₂O by sol-gel method and solvent exchange process.The crystalstructure,crystalform structure and the aperture distribution of the V₂O₅ aerogels were investigated by SEM,TEM,XRD and BET.The experimental Results show that V₂O₅ ambient dried aerogels exhibited a fibrous microstructure,surface area was 138. 9 m² /g and average pore diameter was about 15 nm.V₂O₅ aerogels were crystalline when annealed at 300℃.The electrochemical impedance spectra（EIS）with different potentials were studied by fitting EIS date to an equivalent circuit,and then some kinetics parameters were analyzed and discussed.The electrochemical measurements have shown that the specific capacity of V₂O₅ aerogels derived by the ambient pressure dry is 300.45mAh/g,and it can be used as a good cathode material for Lithium batteries.