Dual-functionality of NiSe2-CoSe2 nanowires for electrochemical charge storage and efficient thermal energy conversion
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Published Version
Date
2025
Authors
Palanisamy, Rupa Ranjani
Padmanathan, N.
Ashokan, Anjali
Tanwar, Amit
Biswas, Subhajit
Holmes, Justin D.
Razeeb, Kafil M.
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Journal ISSN
Volume Title
Publisher
Elsevier Ltd
Published Version
Abstract
Thermo-electrochemical cell coupled with an electrochemical energy storage device creates a comprehensive harvesting system that can convert thermal energy into electrical energy and store it. Thus, the development of electrodes that demonstrate high efficiencies in electrochemical and thermoelectric properties is crucial, as they serve as the fundamental components in energy conversion and storage systems. This study presents the synthesis of NiSe2-CoSe2 (NCS) nanowires on activated carbon cloth (ACC) substrate, for enhanced electrochemical charge storage and ionic-thermoelectric applications. Comparative analysis demonstrates that NCS/ACC electrodes significantly outperform monometallic selenides in both electrochemical performance and thermoelectric applications. The NCS/ACC electrode revealed a maximum charge storage capacity of 112 mA hg−1 at a current density of 1 A g−1. Utilizing 1 M NaOH as an aqueous electrolyte, the NCS/ACC system showcases its pioneering role in thermo-electrochemical cell (TEC), opening avenues for efficient heat-to-electricity conversion. The NCS/ACC-based TEC delivered a Seebeck coefficient of −3.4 mV K−1 and thermal charge storage of −1.02 J. These findings reveal the dual functionality of nickel cobalt selenides, offering promising solutions for thermal energy harvesting and storage in electrochemical systems.
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Keywords
Electrode fabrication , Energy storage , NiSe<sub>2</sub>-CoSe<sub>2</sub> nanowires , Thermal energy harvesting , Thermo-electrochemical cell
Citation
Palanisamy, R. R., Padmanathan, N., Ashokan, A., Tanwar, A., Biswas, S., Holmes, J. D. and Razeeb, K. M. (2025) 'Dual-functionality of NiSe2-CoSe2 nanowires for electrochemical charge storage and efficient thermal energy conversion', Journal of Energy Storage, 121, p.116568. DOI: 10.1016/j.est.2025.116568