Electropolymerized Polypyrrole Nanocoatings on Carbon Paper for Electrochemical Energy Storage

Huige Wei, Yiran Wang, Jiang Guo, Xingru Yan, Ryan O'Connor, Xin Zhang, Nancy Z. Shen, Brandon L. Weeks, Xiaohua Huang, Suying Wei, Zhanhu Guo

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

A highly electrically conductive and uniform polymer film containing small, evenly sized particles was potentiodynamically electropolymerized at a slow scan rate of 50mVs-1, as compared to the strongly agglomerated and low-conducting films obtained at higher scan rates of 100 and 200mVs-1. Cyclic voltammetry and galvanostatic charge-discharge experiments demonstrated a higher areal capacitance, energy density, and power density in the former material. The superior supercapacitive performance was studied by electrochemical impedance spectroscopy (EIS) and can be explained by both a higher electrical conductivity and a facilitated charge transfer in the redox reactions occurring in the former electrode. This work suggests the possibility of fabricating polypyrrole (PPy) pseudocapactive electrodes with high performance via a facile potentiodynamic synthesis at low scan rates. Meanwhile, it provides an alternative to introducing surface functionalities of conductive polymers onto the carbon paper.

Original languageEnglish
Pages (from-to)119-126
Number of pages8
JournalChemElectroChem
Volume2
Issue number1
DOIs
StatePublished - Jan 14 2015

Keywords

  • Capacitors
  • Carbon paper
  • Energy storage
  • Polypyrrole
  • Potentiodynamic synthesis

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