Carbon nanotube-polyaniline core-shell nanostructured hydrogel for electrochemical energy storage

TitleCarbon nanotube-polyaniline core-shell nanostructured hydrogel for electrochemical energy storage
Publication TypeJournal Article
Year of Publication2015
AuthorsChen, P-Y, Courchesne, N-MDorval, Hyder, MNasim, Qi, J, Belcher, AM, Hammond, PT
JournalRsc Advances
Volume5
Issue48
Pagination37970 - 37977
Date Published2015///
Abstract

Conductive polymer hydrogels, which synergize the advantageous features of hydrogels and conductive materials, have been utilized in many electrochemical energy storage applications. Here, we introduce phytic acid as (1) a dispersing agent for pristine multi-walled carbon nanotubes (MWNTs) in aqueous solution containing aniline and as (2) a gelator to form polyaniline (PANI)-based hydrogels after polymerization. The PANI-based hydrogels exhibit nanowire-based mesoporous networks with high surface area and electrical conductivity. The nanostructured core (MWNT)-shell (PANI) hydrogels show an improvement on the electrical conductivity from 0.21 to 1.54 S cm(-1) as the loading of MWNTs increases from 0 to 5.0 wt%. The conducting nanowire-based networks with MWNT loadings of 3.0 wt% in the hydrogel provide efficient electron transport pathways that exhibit a maximal specific capacity of 609 F g(-1). The scalable and facile synthesis demonstrates excellent electrochemical performance, rendering it attractive for sensing, energy conversion, and energy storage applications.