Effect of potential range on electrochemical performance of polyaniline as a component of lithium battery electrodes

Abstract This work studies the dependence of the electrical conductivity of HClO 4 doped polyaniline (PAni) on the potential in an aprotic electrolyte (1 M LiClO 4 in EC/DMC) and establishes that it possesses a sufficiently high conductivity within a narrow potential range 3.3–3.5 V vs. Li/Li + , beyond which its resistance increases sharply. It is shown that PAni, as a component of lithium battery electrodes, could be subjected to stable charge-discharge cycling in the 1.0–4.2 V vs. Li/Li + potential range and that decrease of the lower limit of the potential range below 1.0 V could lead to the formation of an SEI layer, which causes the irreversible reduction of PAni electrochemical performance.