Sohail Ahmad, Hao Zhang, M.S. Al-Buriahi, Zainab Mufarreh Elqahtani, Imran Shakir, Sun Zhi-min, Sami Ullah, Atif Mehmood, Majid Niaz Akhtar
The combined effect of MnO2 and ZnO provides an effective approach to enhance the electrode materials' surface area and redox characteristics for usage in efficient energy storage devices. In the present work, a 1-D α-MnO2/ZnO binary nanocomposite was successfully synthesized and evaluated for supercapacitor applications. The α-MnO2/ZnO electrode exhibited a remarkable capacitance of 650 F g−1 with a current density of 2 A g−1, which is higher than that of pure α-MnO2 (452 F g−1). Moreover, the fabricated asymmetric supercapacitor device (α-MnO2/ZnO//AC) delivered an excellent specific capacitance of 156 F g−1 at 1 A g−1 and an impressive energy density of 55.6 Wh kg−1 in a 1.0 M Na2SO4 electrolyte. Additionally, the prepared electrode maintained exceptional stability, preserving approximately 96% capacitance after 6000 cycles. These findings show that the α-MnO2/ZnO nanocomposite effectively enhances redox activity and offers great potential for practical supercapacitor applications. This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique, 2026
School of Mechanical Engineering, Guizhou University of Engineering Science, Guizhou, 551700, China; School of Chemical Engineering, Guizhou University of Engineering Science, Bijie, 551700, China; Department of Physics, Sakarya University, Sakarya, Turkey; Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, 11671, Saudi Arabia; Department of Physics, Faculty of Science, Islamic University of Madinah, Madinah, 42351, Saudi Arabia; Department of Chemistry, College of Science, Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia; Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia; Institute of Physics, Bahauddin Zakariya University, Multan, Pakistan; Institute of Physics, The Islamia University of Bahawalpur (IUB), Bahawalpur, 63100, Pakistan; Mechanical and Industrial Engineering Department, Engineering Faculty, Universitas Negeri Malang, 65145, Indonesia
