journal article·2025-04-15Open access

Improved electrochemical performance of nanostructured CO3O4/CO3S4 composite for supercapacitor applications

Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan, J. Ahmad, Naeem-Ur-Rehman, Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan, M. Shakil, Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan, M. Saleem, Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan, K. Mahmood, Department of Physics, Government College University, Faisalabad, Pakistan, A. Ali, Department of Physics, Government College University, Faisalabad, Pakistan, M. Imran, Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, P.R. China, S. Sharif, Department of Chemistry, Materials Chemistry Laboratory, Govt. College University, Lahore, Pakistan, Hosam O. Elansary, Department of Plant Production, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia, S. Mumtaz, Department of Chemical and Biological Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si 13120, Republic of Korea, A. D. Khalid, University Institute of Radiological Sciences and Medical Imaging Technology, The University of Lahore, Lahore, Pakistan

Chalcogenide Letters· Volume 22· Issue 4

Abstract

This study highlights the superior electrochemical performance of Co₃O₄/Co₃S₄ composite nanoparticles for supercapacitors, compared to individual Co₃O₄ and Co₃S₄, synthesized using sol-gel, co-precipitation, and mechanical alloying methods. The composite combines pseudocapacitance and electric double-layer capacitance, as evidenced by cyclic voltammetry. It exhibits a specific capacitance of 722.9 F/g at 0.5 A/g and an energy density of 73.8 Wh/kg at 405 W/kg. Electrochemical impedance spectroscopy reveals low charge transfer resistance and excellent cycling stability is achieved, with 98.5% capacitance retention after 1500 cycles. These results confirm the composite's potential for high-performance energy storage applications.
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Research context

OpenAlex topics: Supercapacitor Materials and Fabrication · Fuel Cells and Related Materials · Gas Sensing Nanomaterials and Sensors

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