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Controllable synthesis of nickel bicarbonate nanocrystals with high homogeneity for a high-performance supercapacitor
- Source :
- Nanotechnology. 28:345401
- Publication Year :
- 2017
- Publisher :
- IOP Publishing, 2017.
-
Abstract
- The electrochemical performance of supercapacitors might be associated with the homogeneous structure of the electrode materials. However, the relationship between the degree of uniformity for the electrode materials and the electrochemical performance of the supercapacitor is not clear. Herein, we synthesize two types of nickel bicarbonate nanocrystals with different degrees of uniformity to investigate this relationship. As the electroactive material, the nickel bicarbonate nanocrystals with a homogeneous structure could provide a larger space and offer more exposed atoms for the electrochemical reaction than the nanocrystals with a heterogeneous structure. The homogeneous nickel bicarbonate nanocrystals exhibit better electrochemical performance and show excellent specific capacitance (1596 F g-1 at 2 A g-1 and 1260 F g-1 at 30 A g-1), which is approximately twice that of the heterogeneous nickel bicarbonate nanocrystals. The cycling stability for the homogeneity (∼80%) is higher than the inhomogeneity (∼61%) at a high current density of 5 A g-1.
- Subjects :
- Supercapacitor
Materials science
Nanostructure
Mechanical Engineering
Bicarbonate
Inorganic chemistry
chemistry.chemical_element
Bioengineering
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
Capacitance
0104 chemical sciences
Nickel
chemistry.chemical_compound
chemistry
Nanocrystal
Mechanics of Materials
Homogeneity (physics)
General Materials Science
Electrical and Electronic Engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 13616528 and 09574484
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Nanotechnology
- Accession number :
- edsair.doi.dedup.....dee3198af3a2eb7cc542512c34447024