Electrochemical behavior of polyaniline composite doped with poly [p-styrenesulfonate-co-methoxyoligo (ethyleneglycol) acrylate] in aqueous electrolyte and its application to the lithium ion concentration battery

Polyaniline-poly[p-styrenesulfonate-co-methoxyoligo(ethyleneglycol)acrylate] composite, PANI-P(SS-co-MOEGA), was prepared from chemically synthesized PANI and P(SS-co-MOEGA). PANI-P(SS-co-MOEGA) composite film was cast onto an indium-tin oxide (ITO)-coated glass plate and electrochemical behavior of the modified electrode in 0.1 mol dm−3 LiClO4/0.1 mol dm−3 HClO4 aqueous solution was investigated. XPS measurement of the composite film treated with potential cycling in the electrolyte solution indicated that cations (lithium ions) were doped from the electrolyte solution to PANI-P(SS-co-MOEGA) composite and dedoped from the composite film to the solution. The composite film is a pseudo n-dopable conducting polymer composite. A lithium ion concentration battery was constructed with PANI-P(SS-co-MOEGA) composite electrodes (anode and cathode) in 0.1 mol dm−3 LiClO4/0.1 mol dm−3 HClO4 aqueous solution. The cell showed good cyclability (over 100 cycles) and high coulomb efficiency (about 100%).