Electropolymerized Polypyrrole Nanocoatings on Carbon Paper for Electrochemical Energy Storage. Issue 1 (28th October 2014)

• Record Type: Journal Article
• Authors: Wei, Huige; Wang, Yiran; Guo, Jiang; Yan, Xingru; O'Connor, Ryan; Zhang, Xin; Shen, Nancy Z.; Weeks, Brandon L.; Huang, Xiaohua; Wei, Suying; Guo, Zhanhu
• Is Part Of: ChemElectroChem. Volume 2:Issue 1(2015)
• Page Start: 119
• Page End: 126
• Publication Date: 2014-10-28
• Subjects: Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201402258
• Languages: English
• ISSNs: 2196-0216

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A highly electrically conductive and uniform polymer film containing small, evenly sized particles was potentiodynamically electropolymerized at a slow scan rate of 50 mV s⁻¹, as compared to the strongly agglomerated and low‐conducting films obtained at higher scan rates of 100 and 200 mV s⁻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.</p> </abstract>