Year-end Sale % OFF 
Abstract
Flaky particles of polyaniline (PANI)-graphene (GN) with rectangular size of 1.0-1.5 mm are dispersed in aqueous solution so that their suspension is stable for one day without aggregation. The weight fraction of PANI in the particle is 75 %, which is independent of the loaded fraction of PANI in the synthesis. The PANI-GN film made of the suspension forms a self-standing, elastic, conductive film. The PANI-GN suspension exhibits both the reduction and the oxidation waves at potentials similar to those of PANI adsorbed on an electrode, whereas the PANI-GO suspension shows only the voltammetric reduction wave. The redox peak currents are controlled by diffusion of PANI-GN flakes. The PANI-GN film cast on the electrode shows voltammetric peaks for PANI, of which redox charge is larger than that of the electrochemically polymerized PANI film with the common weight of PANI. This fact can be explained in terms of the electrochemically exhaustive oxidation of PANI through the electric conduction of GN.
Highlights
Graphene (GN) is a promising material of super capacitors because its two-dimensional sp2-hybridized carbon sheet provides extremely large surface area in contact with solution (Segal, 2009; Feng et al, 2011)
The PANI-Graphite oxide (GO) suspension, which was reduced with hydrazine, got dark green and had no sedimentation
Since GO may be reduced to GN, we call it PANI-GN
Summary
Graphene (GN) is a promising material of super capacitors because its two-dimensional sp2-hybridized carbon sheet provides extremely large surface area in contact with solution (Segal, 2009; Feng et al, 2011). The roles of PANI of the PANI-GN composite are i) to keep electric connection of GN flakes with PANI so that all the flakes on the electrode are electrically percolated (Yan et al, 2010; Gao et al, 2013; Zhang et al, 2013), and ii) to utilize charge of the redox reactions of PANI (Luo et al, 2013; Xiong et al, 2014). We are concerned with finding these relations in this report by use of PANI-GN suspension, because suspensions can be prepared generally by controlling interactions among dispersed particles
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
