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Influence of electrodeposition temperature in the electrochemical properties of Ni(OH)2: An experimental and theoretical study
- Source :
- Thin Solid Films. 670:24-33
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- In the present work, electrodeposition different temperatures are employed to obtain nickel hydroxide films on titanium substrate. The influence of this parameter on the electrochemical properties of the material is studied. The films are morphologically and structurally characterized using techniques of X-Ray Diffraction and Scanning Electronic Microscopy. The density functional theory (DFT) calculations are performed to study the effect of strain applied along the Ni(OH)2 unit cell and electron density maps are performed to relate with electrochemical properties. For the electrochemical characterization are used cyclic voltammetry, galvanostatic charge- discharge and electrochemical impedance spectroscopy techniques. The films deposited at 10 °C, development a structure which favors the charge storage, both in those more accessible surfaces, and in those of more difficult access, by electrolyte ions. This fact is in correspondence with the DFT results for this temperature that suggests an improvement in the material electrochemical properties, showing a high capacitance value (2549 F g1).
- Subjects :
- 010302 applied physics
Materials science
Metals and Alloys
chemistry.chemical_element
02 engineering and technology
Surfaces and Interfaces
Substrate (electronics)
Electrolyte
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
Capacitance
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Dielectric spectroscopy
Nickel
chemistry
Chemical engineering
0103 physical sciences
Materials Chemistry
Density functional theory
Cyclic voltammetry
0210 nano-technology
Subjects
Details
- ISSN :
- 00406090
- Volume :
- 670
- Database :
- OpenAIRE
- Journal :
- Thin Solid Films
- Accession number :
- edsair.doi...........b50573d1681fe3ab5b1859e9bb2e3c03