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Porphyrin‐Based Conducting Polymer Hydrogel for Supercapacitor Application
Author(s) -
Das Debasree,
Kurungot Sreekumar
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000061
Subject(s) - supercapacitor , polypyrrole , materials science , dopant , capacitance , conductive polymer , chemical engineering , polymer , counterion , electrochemistry , electrode , polymer chemistry , nanotechnology , ion , organic chemistry , doping , chemistry , polymerization , composite material , optoelectronics , engineering
Herein, the electrochemical properties and energy storage capability of a flexible, all‐solid‐state supercapacitor based on the supramolecular assembly of polypyrrole (PPy) and the anion of 5,10,15,20‐tetrakis(4‐sulfonatophenyl)‐21H,23H‐porphine manganese(III) chloride (MnTSPP) are reported. The electrode material consists of a conductive polymer hydrogel formed through the gelation initiated by cross‐linking of the dopant MnTSPP anion in the PPy chains. The morphology of the cross‐linked polymer hydrogel is that of a particle‐decorated nanofiber, which can perform as a flexible supercapacitor electrode material with a specific capacitance of 300 Fg −1 and capacitance retention of 78% up to 10 000 cycles. The anion of MnTSPP plays a pivotal role in enhancing the charge storage capability by facilitating the electron transfer between the polymer interchains. In addition, the steric hindrance due to the large size of the dopant counter ions of MnTSPP reduces the counterion drain effect and structural pulverization of PPy, thereby improving the capacitive retention.