A facile method to prepare the hollow microspherical polyaniline was developed utilizing potassium hexacyanoferrate (Ⅲ) as the oxidant for polymerization of aniline in aqueous condition without any acid or alkali or organic solvent

and the doped polyaniline with electrical conductivity of 10-3 S/cm could be directly obtained with hexacyanoferrate (Ⅱ) anion surrounding imine and amine atoms in polyaniline main-chain.And this value was almost seven orders of magnitude higher than the polyaniline hollow spheres synthesized in alkaline medium.This product was then characterized by Fourier transform infrared (FTIR) spectroscopy

X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM).A systematic and careful electrochemical test was carried out to deeply investigate its potential application for lithium-oxygen battery.The experimental results show that

this low cost and easily produced material could catalyze the battery discharge reaction independently

and its first discharge capacity is almost twice as high as that for the cathode made by traditional bulk polyaniline material.After an initial degradation from 2631 to 1748 mAh/g PANI during the first 5 cycles at a current density of 0.05 mA/cm-1

its discharge capacity kept relatively stable in the next 25 cycles with only 5% loss

which may provide a new choice for fabrication of high-capacity rechargeable lithium-oxygen battery for practical application.