Composite electrode composed of bimodal porous carbon and polypyrrole for electrochemical capacitors

Functionalization Methods of Carbon Nanotubes and Its Applications

“…Polyaniline, polypyrrole, polythiophene and their derivatives have been considered as promising materials for supercapacitors [Woo et al, 2008], electrochemical sensor [Waghuley et al, 2008], modification agent [Mohana Reddy et al, 2009] and so on due to the existence of various oxidation structures, electrically conducting polymers. Among them, conducting polypyrrole has been the focus of a great deal of research for catalytic materials application in recent years because its superior properties including high electric conductivity, high specific capacitance and good chemical and thermal stability, especially facile synthesis and environmentally friendly.…”

Preparation of mesoporous carbon/polypyrrole composite materials and their supercapacitive properties

“…Compared with mesopourous carbon materials, conducting polymers (CPs) possess pseudocapacitance, which is almost 10-100 times higher than the capacitance of electrochemical double-layer capacitors (EDLCs) [8]. Polypyrrole (PPy), one of CPs, has drawn a lot of attention for supercapacitor applications [9,10], mainly due to its oxidation-reduction properties, high conductivity in doped state, high specific capacitance, good environmental stability, and especially facile synthesis [11]. However, the shortcomings of CPs, such as low surface area and constrained power-output properties [12], markedly restrict their application to electrochemical capacitors.…”

Usefulness of a composite electrode with a carbon surface modified by electrosynthesized polypyrrole for supercapacitor applications

“…COP are mostly applied to the surface modification of carbon-containing electrodes, essentially because of their interesting chemical characteristics for energy storage, low cost of production, good electrochemical reversibility during the charge-discharge phenomena, as well as their large charge density, and their relatively easy chemical and/or electrochemical synthesis [3,4,[7][8][9].…”

“…This low capacity can be considerably improved by building composite electrodes made of conducting polymer/carbonaceous substrate as graphite [11,12], or by coupling conducting polymer with carbon nanotubes [4,8,13,14]. In these conditions, COP can be easily deposited on the graphite or on other carbon substrates by a chemical or an electrochemical method [4,9,15,16].…”

“…The storage electrochemical capacity of graphite can be improved by increasing its specific surface, either by chemical activation or by addition of a pseudo-capacitance which consists to deposit a COP such as polypyrrole (PPy) on the graphite surface or within its structure [10,16,17]. Also, in a recent study, Woo et al [9] prepared a composite electrode consisting of bimodal porous carbon and PPy, obtained by electropolymerization of pyrrole within the macropores of the bimodal porous carbon.…”