Journal article
A biopolymer gel-decorated cobalt molybdate nanowafer: Effective graft polymer cross-linked with an organic acid for better energy storage
New Journal of Chemistry, Vol.40(3), pp.2863-2877
2016
Abstract
Nanoflake-like α-CoMoO4 was prepared with the aid of a cationic surfactant, cetyltrimethylammonium bromide (CTAB), as an electrode material for supercapacitors by scalable solution combustion synthesis (SCS). The specific capacitance of the fabricated hybrid device (CoMoO4/CTAB vs. activated carbon (AC)) was 39 F g-1, a marginal increase compared to that of the as-prepared (parent) CoMoO4 (24 F g-1). To achieve better energy storage, modification was carried out on CoMoO4 by grafting chitosan onto it in the presence of a weak acetic acid (AA) or citric acid (CA) crosslinking agent. The biopolymer chitosan is cross-linked when using CA as a cross-linker, while in the case of acetic acid, grafting of chitosan/AA does not occur. The improved properties of CTAB- and polymer-modified CoMoO4 were evaluated using physical and electrochemical methods and compared with the as-prepared (parent) compound. The polymer-modified composite exhibited a maximum specific capacitance of 71 F g-1 at 2 mA cm-2 with a capacity retention of 81% after 2000 cycles, about twofold higher than that of the CTAB-modified electrode. The influence of surfactant and chitosan concentrations on the specific capacitance is also established. A solid state capacitor was fabricated using CoMoO4vs. AC, with chitosan as the gel separator. High resolution transmission electron microscopy (HR-TEM) and field emission scanning electron microscopy (FE-SEM) images support the cross-linking strategy and nanowafer-like morphology with a honeycomb arrangement.
Details
- Title
- A biopolymer gel-decorated cobalt molybdate nanowafer: Effective graft polymer cross-linked with an organic acid for better energy storage
- Authors/Creators
- R. Ramkumar (Author/Creator)M. Minakshi (Author/Creator)
- Publication Details
- New Journal of Chemistry, Vol.40(3), pp.2863-2877
- Publisher
- Royal Society of Chemistry
- Identifiers
- 991005543257607891
- Copyright
- © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2016.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
Metrics
64 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Citation topics
- 2 Chemistry
- 2.62 Electrochemistry
- 2.62.52 Electrode Materials
- Web Of Science research areas
- Chemistry, Multidisciplinary
- ESI research areas
- Chemistry