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

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Abstract

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 (Rs) 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.

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Authors and Affiliations

  1. PG & Research Department of Physics, National College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli, 620 001, Tamil Nadu, India

    A. Robert Xavier, A. T. Ravichandran & M. Dhivya Angelin

  2. Centre for Research and Post-Graduate Studies in Physics, Ayya Nadar Janaki Ammal College, Sivakasi, 626 189, Tamil Nadu, India

    Subbukalai Vijayakumar

  3. PG & Research Department of Chemistry, Bishop Heber College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli, 620 017, Tamil Nadu, India

    S. Rajkumar & J. Princy Merlin

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  1. A. Robert Xavier
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Xavier, A.R., Ravichandran, A.T., Vijayakumar, S. et al. Synthesis and characterization of Sr-doped CdO nanoplatelets for supercapacitor applications. J Mater Sci: Mater Electron 33, 8426–8434 (2022). https://doi.org/10.1007/s10854-021-06329-z

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