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A Wire-Shaped Supercapacitor in Micrometer Size Based on Fe3O4 Nanosheet Arrays on Fe Wire
- Source :
- Nano-Micro Letters, Vol 9, Iss 4, Pp 1-8 (2017)
- Publication Year :
- 2017
- Publisher :
- SpringerOpen, 2017.
-
Abstract
- One-dimensional (1D, wire- and fiber-shaped) supercapacitors have recently attracted interest due to their roll-up, micrometer size and potential applications in portable or wearable electronics. Herein, a 1D wire-shaped electrode was developed based on Fe3O4 nanosheet arrays connected on the Fe wire, which was prepared via oxidation of Fe wire in 0.1 M KCl solution (pH 3) with O2-rich environment under 70 °C. The obtained Fe3O4 nanosheet arrays displayed a high specific capacitance (20.8 mF cm−1 at 10 mV s−1) and long cycling lifespan (91.7% retention after 2500 cycles). The excellent performance may attribute to the connected nanosheet structure with abundant open spaces and the intimate contact between the Fe3O4 and iron substrate. In addition, a wire-shaped asymmetric supercapacitor was fabricated and had excellent capacitive properties with a high energy density (9 µWh cm−2) at power density of 532.7 µW cm−2 and remarkable long-term cycling performance (99% capacitance retention after 2000 cycles). Considering low cost and earth-abundant electrode material, as well as outstanding electrochemical properties, the assembled supercapacitor will possess enormous potential for practical applications in portable electronic device.
- Subjects :
- Materials science
Capacitive sensing
Wire-shaped supercapacitor (WSSC)
Nanotechnology
02 engineering and technology
Substrate (electronics)
010402 general chemistry
01 natural sciences
Capacitance
lcsh:Technology
Micrometre
One-dimensional
Electrical and Electronic Engineering
Nanosheet
Power density
Supercapacitor
lcsh:T
Fe wire
021001 nanoscience & nanotechnology
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Nanosheet arrays
Electrode
Fe@Fe3O4
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 21505551 and 23116706
- Volume :
- 9
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Nano-Micro Letters
- Accession number :
- edsair.doi.dedup.....745d2172971e0b4fe2ed69b44c74f15f
- Full Text :
- https://doi.org/10.1007/s40820-017-0147-3