Organic electrode material based on tris-imidazole ring containing triphenylamine (donor)-anthraquinone (acceptor) for high performance pseudocapacitors.

Abstract

To meet the challenges of the energy sector adaptation of novel electrode materials is urgently needed. Pseudocapacitors are electrochemical energy storage devices and are utilized to fulfill the growing demand of the society. In this connection, donor-acceptor commands are attractive alternatives to inorganic materials die to their optoelectronic properties. Herein, a triphenylamine-anthraquinone based donor-acceptor chromophore was developed in electrode materials. As prepared electrode materials based on TPA-IM-AQ on graphite foil (GF) are employed to fabricate a three-electrode supercapacitor (SC) device in 1M H2SO4 electrolyte. At 0.5 A g-1 current density TPA-IM-AQ electrodes based SC can deliver higher specific capacitance (Csp) of 275.72 F g-1 at 0.5 A g-1 current density and at 5 mV s-1 scan rate with Csp of 233.63 F g-1. Moreover, two-electrode symmetric supercapacitor (SSC) exhibited Csp of 91.63 F g-1 at 0.5 A g-1 with energy density as high as 16.49 Wh kg-1 at a power density of 1079.96 W kg-1. The TPA-IM-AQ/GF based device exhibits good Csp retention with 88.40% after 5000 cycles at 3 A g-1. As-fabricated TPA-Im-AQ/GF electrode demonstrated the advantages of utilizing small organic molecule to achieve wider operational potential window and higher specific capacitance.