One-step potentiostatic codeposition and electrochemical studies of poly(1-pyrenyl)-2,5-di(2-thienyl)pyrrole-co-pyrrole) film for electrochemical supercapacitors

Authors : Hakan GÖRÇAY, İlhami ÇELİK, Yücel ŞAHİN

Pages : 958-973

View : 29 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this paper, we report a simple, low-cost, and environmentally friendly electrochemical method to obtain a novel copolymer consisting of 1-pyrenyl-2,5-diinsert ignore into journalissuearticles values(2-thienyl);pyrrole and pyrrole on a pencil graphite electrode insert ignore into journalissuearticles values(PGE);. Polyinsert ignore into journalissuearticles values(1-pyrenyl);-2,5-diinsert ignore into journalissuearticles values(2-thienyl);pyrrole-co-pyrrole); that is Pinsert ignore into journalissuearticles values(PyrPy-co-Py); film was prepared by one-step potentiostatic codeposition in an ethanol solution containing PyrPy and Py monomers for supercapacitor applications. The electrodeposition of homopolymer and copolymer modified electrodes was carried out on the surface of the PGE via chronocoulometry. For comparison, Pinsert ignore into journalissuearticles values(Py);/PGE and Pinsert ignore into journalissuearticles values(PyrPy);/PGE were also electrochemically synthesized under the same reaction conditions. The surface morphologies of all the electrode materials were analyzed by field emission scanning electron microscopy. The capacitive properties of the modified PGEs were investigated in 1 M H 2 ` role=`presentation`> 2 2 _{2} SO 4 ` role=`presentation`> 4 4 _{4} electrolyte solution by cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge-discharge methods. Compared with Pinsert ignore into journalissuearticles values(Py);/PGE and Pinsert ignore into journalissuearticles values(PyrPy);/PGE, the Pinsert ignore into journalissuearticles values(PyrPy-co-Py);/PGE composite exhibited the best electrochemical behavior and had the highest specific capacitance value of 397.18 F g − 1 ` role=`presentation`> − 1 − 1 ^{-1} in 1 M H 2 ` role=`presentation`> 2 2 _{2} SO 4 ` role=`presentation`> 4 4 _{4} at a scan rate of 2 mV s − 1 ` role=`presentation`> − 1 − 1 ^{-1} . These results indicated that this modified electrode can be used as an electrode material for electrochemical supercapacitors.
Keywords : Supercapacitor, pyrrole, copolymer, electrochemical deposition, electrochemical impedance spectroscopy