(a) Cyclic voltammograms for Pt, PANI (CD), 4-ATP/PANI (CD), and PANI (ECD) electrodes recorded in a supporting electrolyte consisting of 10 mM LiI, 1 mM I2 acetonitrile solution containing 0.1 M LiClO4 at a scan rate of 50 mV·s−1. (b) Cyclic voltammograms for PANI (CD) CEs with different deposition times in the same electrolyte as (a). (c) Nyquist plots of Pt, PANI (CD), 4-ATP/PANI (CD), and PANI (ECD) electrodes obtained at open circuit voltage under irradiation of 100 mW·cm−2. The inset is the equivalent circuit. (d) Nyquist plots of EIS for the symmetrical cells with 4-ATP/PANI (CD) electrode subjected to aging at room temperature.