Study of dc conductivity and battery application of polyethylene oxide/polyaniline and its composites

摘要

The polymer electrolyte based on polyethylene oxide (PEO) complexed with conducting polyaniline (PANI) and salts of AgNO_3 and NaNO_3 has been prepared in different weight percentage ratios. The complexation is confirmed by infra-red and X-ray diffraction studies. Conductivity (dc) measurements are carried out using a two-probe technique in the temperature range 30-80℃. Electrochemical cell parameters for battery application at room temperature are also been determined. The electric conductivities are 1.5 x 10~(-5) S cm~(-1) at 30℃ and 5.5 x 10~(-2) S cm~(-1) at 80℃ for a PEO:PANI (50:50) composite. The conductivity increases with increasing weight percentage of polyaniline in polyethylene oxide, which may be due to a strong hopping mechanism between the ether group of polyethylene oxide and conducting polyaniline. Samples are fabricated for battery application in configurations of Na:(PEO + PANI):(I_2 + C + sample) and their experimental data are measured using the Wagner polarization technique.