Electrochemical synthesis and characterization of bilayers of poly(O-aminophenol)/ polypyrrole/lignin composites for enhanced charge storage in supercapacitors

Abstract

ABSTRACT. Using simple electrosynthesis methods a single and bilayer of conducting polymers, polypyrrole and poly(o-aminophenol) with biopolymer lignin hybrid composites were formed on gold electrodes. The specific capacitance of the single polymer-lignin composite value of 400 F/g obtained from galvanostatic charge-discharge experiment at 1 A/g is improved to a value of 514 F/g in the bilayer polymer-lignin composite systems. The charge capacity is also improved from 61 mAh/g to 121 mAh/g by forming a bilayer of conducting polymers. Moreover, the charge retention during self-discharge is improved in the bilayer system.

Lignin‐derived electrochemical energy materials and systems

“…Composites combining lignin with other conducting polymers also showed considerable energy storage performance . As reported before, a ternary composite system of polypyrrole, lignin derivative, and phosphomolybdic acid was fabricated, exhibiting improved charge storage capacity in comparison with a single polymer of polypyrrole . Comparable properties were reported with alkali lignin / polypyrrole electrodes, lignin/PEDOT‐conjugated polymer electrodes, and polyaniline doped with lignosulfonate, etc., have also been fabricated.…”

Full-cell quinone/hydroquinone supercapacitors based on partially reduced graphite oxide and lignin/PEDOT electrodes

“…The conducting polymer facilitated the transport of electrons and ions from the electrolyte to the lignin moiety. In addition, various combinations of lignin and other electron conductors [11][12][13][14][15][16] such as reduced graphene oxide 17 or carbon nanotubes 18 have been investigated as electrode materials. More recently, poly(3,4-ethylenedioxythiophene) (PEDOT) was used to facilitate the electron transfer in Lig/PEDOT electrodes for supercapacitor applications.…”