Synthesis and characterization of Sr-doped CdO nanoplatelets for supercapacitor applications

Undoped and Sr-doped CdO  nanoplatelets were efficiently synthesized via simple co-precipitation method. The prepared materials were characterized using X-ray diffraction (XRD) and Scanning electron microscope (SEM). XRD pattern confirms the synthesized nanomaterial was phase pure Sr-doped CdO. SEM...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2022-04, Vol.33 (11), p.8426-8434
Main Authors: Xavier, A. Robert, Ravichandran, A. T., Vijayakumar, Subbukalai, Angelin, M. Dhivya, Rajkumar, S., Merlin, J. Princy
Format: Article
Language:English
Subjects:
Cadmium
Capacitance
Carbon black
Caustic soda
Characterization and Evaluation of Materials
Charge transfer
Chemistry and Materials Science
Diffraction patterns
Discharge
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrode materials
Electrodes
Energy
Graphene
Materials Science
Metal oxides
Nanomaterials
Nitrates
Optical and Electronic Materials
Scanning electron microscopy
Supercapacitors
Synthesis
Trace elements
Voltammetry
X-ray diffraction
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Summary:Undoped and Sr-doped CdO  nanoplatelets were efficiently synthesized via simple co-precipitation method. The prepared materials were characterized using X-ray diffraction (XRD) and Scanning electron microscope (SEM). XRD pattern confirms the synthesized nanomaterial was phase pure Sr-doped CdO. SEM images reveal the formation of nanoplatelets like morphology. Electrochemical supercapacitor characterization of CdO and Sr-doped CdO nanoplatelets were done using cyclic voltammetry, Galvanostatic charge–discharge, and Electrochemical impedance spectroscopy measurements. The estimated specific capacitance value for Sr-doped CdO and CdO at a current density of 1 Ag −1 was 752 and 250 Fg −1 . The Sr-doped CdO nanoplatelets exhibits about three times higher specific capacitance than the pure CdO electrode material. Sr-doped CdO electrode retains 93% of initial specific capacitance after 2000 charge–discharge cycles whereas CdO retains only 85%. The solution resistance ( R s ) value of Sr-doped CdO (2.95 Ω) is lower than the CdO (3.57 Ω). This high specific capacitance, long cycle life and low charge transfer resistance confirms the suitability of Sr-doped CdO nanoplatelets for supercapacitor applications.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-021-06329-z