Fabrication and electrochemical characteristic analysis of iodine-doped kraft lignin/polypyrrole conductive fiber mats

초록

2-furoyl kraft lignin-polypyrrole copolymer mats by surface doping with iodine were prepared by electrospun 2F-KL/PPy copolymer. The 2F-KL/PPy copolymer were synthesized by interfacial polymerization of pyrrole with acylated 2-furoly kraft lignin. The structural properties were analyzed by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM) and thermogravimetric (TGA) analysis. In addition, electrochemical properties of the 2F-KL/PPy were evaluated by cyclic voltammetry test using coin cell. The iodine-doped 2F-KL/PPy electrode coin cells exhibited specific capacitance of 34 F-g -1 at a scan rate of 2 mV-s -1 . The specific capacitance of iodine-doped 2F-KL/PPy electrode coin cell was higher than that of 2F-KL/PPy electrode without doping iodine. According to the electrochemical properties, the iodine-doped 2F-KL/PPy copolymer could be suitable for energy storage device electrode. However, the specific capacity of iodine-doped 2F-KL/PPy and 2F-KL/PPy electrode decreased gradually at a high scan rates. Since water-soluble electrolyte could not react with the electrode, the specific capacity of the coin cell decreased. © 2018 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

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