Energy storage performance of supercapacitor based on PEDOT flexible nanotube electrode
Aiming to solve the problems of low specific capacity,poor bendability,poor adhesion and easy falling off from the electrode materials of the supercapacitors,the poly 3,4-ethylenedioxthiophene(PEDOT)with nanotube structures was in-situ grown on carbon cloth(CC)by a simple vapor phase polymerization(VPP).In this process,the carbon cloth,serving as a flexible substrate and current collector,provided the ordered electronic channels.The PEDOT nanotubes uniformly coated on CC can not only expose more electrochemical active sites but also effectively enhance the electrochemical reaction efficiency and electrode/electrolyte interface stability.Additionally,the effects of different polymerization temperatures on the surface morphology and energy storage characteristics were explored.PEDOT/CC electrode materials show the best electrochemical performance under the optimal experimental conditions(130 ℃,120 min),with the specific capacitance reaching 663.34 F/g at 1 A/g.Furthermore,the asymmetric device was assembled with NiCo-MOF as the positive electrode and the PEDOT/CC as the negative electrode,having a voltage window of 1.6 V.Its specific capacitance could reach 178.19 F/g and exhibit a high energy density of 53.84 Wh/kg at 1 A/g.This work shows that improving the electrode reaction kinetics via PEDOT nanotubes in-situ grown on CC is one of the effective ways to construct high performance asymmetric supercapacitors.
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维普
