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Birnessite-type MnO2 nanosheet arrays with interwoven arrangements on vapor grown carbon fibers as hybrid nanocomposites for pseudocapacitors
- Source :
- Dalton Transactions. 45:19322-19328
- Publication Year :
- 2016
- Publisher :
- Royal Society of Chemistry (RSC), 2016.
-
Abstract
- Manganese dioxide nanosheet arrays with interconnected arrangements are easily synthesized on vapor grown carbon fibers (MnO2 NSAs@VCFs) by a simple wet-chemical method at low temperature. The conductive nature of the VCFs serves as a scaffold and easily reduces potassium permanganate species for the formation of hierarchical MnO2 NSAs@VCFs. When utilized as an electroactive material for pseudocapacitors, the sophisticated configuration of the nanocomposite provides an effective electrochemical activity and an electron pathway for higher electrochemical performance in 1 M Na2SO4 aqueous solution. The hierarchical MnO2 NSAs@VCFs exhibit a maximum specific capacitance of 115.3 F g−1 at a current density of 0.5 A g−1 with an excellent cycling stability of 85.6% after 2000 cycles at a current density of 5 A g−1. Such facile and cost-effective fabrication of a metal oxide nanocomposite with improved electrochemical performance allows it to be considered as a promising electroactive material for energy storage devices.
- Subjects :
- Aqueous solution
Materials science
Fabrication
Nanocomposite
Birnessite
Oxide
Nanotechnology
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
0104 chemical sciences
Inorganic Chemistry
chemistry.chemical_compound
chemistry
Pseudocapacitor
0210 nano-technology
Nanosheet
Subjects
Details
- ISSN :
- 14779234 and 14779226
- Volume :
- 45
- Database :
- OpenAIRE
- Journal :
- Dalton Transactions
- Accession number :
- edsair.doi...........7d0b3df9a7137f250a1984c2d28ca8eb