Organic acid doped polythiophene nanoparticles as electrode material for redox supercapacitors

An organic acid doped electronically conducting polymer nanomaterial, polythiophene‐tartaric acid (PTh‐TA) nanoparticles, was prepared by cationic surfactant‐assisted dilute polymerization method. The physical properties of the synthesized polymer were characterized by FT‐IR, UV‐visible spectroscopy, X‐ray diffraction, SEM, and electrical conductivity studies. The symmetric type redox supercapacitor performances were studied in PVdF‐HFP in 1 M LiPF6 containing EC&PC (1:1 v/v) based microporous polymer electrolyte. The specific capacitance of the capacitor was found to be 156 F g−1. The energy and power densities were calculated as 14 Wh kg−1 and 522 W kg−1, respectively. The value of capacitance was found to be almost stable up to 1000 cycles and even more.