Correlation between different characterizations and improved electrochemical performances of cuprous oxide-based nanocrystals

Herein, we employed the sol–gel technique to synthesize Cu 2 O-based nanocrystals with Co and Na doping and co-doping, respectively. A correlation was established among several characterizations of cuprous oxide-based nanocrystals to observe their feasibility in the field of energy materials. Raman...

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Bibliographic Details
Published in:Bulletin of materials science 2023-07, Vol.46 (3), p.141, Article 141
Main Authors: Kumar, Naveen, Limbu, Sanjeeb, Chauhan, Ram Narayan
Format: Article
Language:English
Subjects:
Carbon black
Caustic soda
Chemistry and Materials Science
Cobalt
Copper
Copper oxides
Doping
Electrical measurement
Electrochemical analysis
Electrode materials
Electrodes
Electrons
Energy storage
Engineering
Materials Science
Nanocrystals
Nanomaterials
Nanoparticles
Particle size
Photoluminescence
Raman spectra
Sodium
Sol-gel processes
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Summary:Herein, we employed the sol–gel technique to synthesize Cu 2 O-based nanocrystals with Co and Na doping and co-doping, respectively. A correlation was established among several characterizations of cuprous oxide-based nanocrystals to observe their feasibility in the field of energy materials. Raman spectra typically show the formation of Cu 2 O, whereas, in the case of Na co-doping, it exhibits the partial presence of CuO. This form of the results prompts the conductivity of nanocrystal samples to be enhanced. According to the current–voltage measurement, the current response slightly increases as doping and co-doping concentrations rise, in which Na5% co-doped Cu 2 O:Co shows the optimum. Photoluminescence (PL) lifetime measurement shows increases in relative PL lifetime intensity caused by Na doping, which may be attributed to oxygen vacancies. Moreover, it is observed from the cyclic voltammetry (CV) profile that the Na and Co-doped concentration significantly enhances energy storage capability. The electrode using Na5%Cu 2 O:Co has shown capacitive retention of 69% after 500 GCD cycles @ 10 A g –1 . This indicates the practical applicability of these developed cuprous oxide-based nanocrystals as electrode materials for improved electrochemical property. Eventually, the charge–discharge was performed at different current densities, in which specific capacitance was consistent with the CV result.
ISSN:0973-7669
0250-4707
0973-7669
DOI:10.1007/s12034-023-02984-6