A novel high performance poly (2-methyl thioaniline) based composite electrode for supercapacitors application

By Jena, R. K.; Yue, C. Y.; Sk, M. M.; Ghosh, K.
Published in Carbon NULL 2017

Abstract

Abstract Over the last decade there has been an increasing worldwide demand for electrochemically active materials for supercapacitor applications. In this study, a novel {PANI} derivative, poly (2-methyl thioaniline) coated {MWCNT} (PMTA@CNT) and its composite with graphene (PMTA@CNT/RGO) have been explored for supercapacitor application. Both the PMTA@CNT and PMTA@CNT/RGO electrodes showed much higher specific capacitances of about 522 F g?1 and 616 F g?1, respectively in 6 M {KOH} electrolyte at a current density of 1 A g?1. These results are about 36% and 28% higher compared to the PANI@CNT and PANI@CNT/RGO, respectively, which were prepared by same synthesis route as that of {PMTA} based electrode. The excellent electrochemical performance of the {PMTA} based composite electrode compared to {PANI} based composite electrode is due to the presence of very good electron donating group (SCH3) in {PMTA} that makes the {PMTA} molecule electronically rich through resonance effect which helps to facilitate the charge-transfer between the two components through the ? electrons of the quinoid rings in {PMTA} and the benzenoid rings of carbon nanotubes or graphene. Therefore, {PMTA} composite electrode with good capacitive behaviour encourages its use to compete with {PANI} composite based electrode.

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