Syadza Aisyah Hermadianti, Murni Handayani, Isa Anshori, Lok Kumar Shrestha, Fariz Irkham Muadhif, Muhammad Aulia Anggoro, Gagus Ketut Sunnardianto, Katsuhiko Ariga, Bambang Wisnu Widagdo, Frida Ulfah Ermawati, Arie Wibowo
Reduced graphene oxide (rGO)/MgTiO3 nanocomposites have attracted significant attention as promising hybrid electrode materials for supercapacitor applications due to their enhanced electrical conductivity and electrochemical stability. In this study, Zn2+ ion doping at the Mg2+ site of MgTiO3 was introduced to form (Mg1-xZnx)TiO3 (x = 0.05, 0.10, 0.15) to preserve the crystal structure, suppress material degradation, and improve redox-active electrochemical performance. The MgTiO3 powders were synthesized using a liquid mixing method, followed by the in-situ growth of rGO onto the MgTiO3 surface to obtain rGO/MgTiO3 and rGO/(Mg1-xZnx)TiO3 nanocomposites. Structural analysis confirmed the formation of a substitutional solid solution, where MgTiO3 remained the dominant phase with a composition of (70.77-99.99)% by weight. Morphological characterization revealed the successful formation of interconnected rGO nanosheets on MgTiO3 particles, providing a conductive network and an enlarged surface area for charge transport. The optimized rGO/(Mg0.90Zn0.10)TiO3 (rGO/MZ10T) electrode exhibited excellent electrochemical performance with a high specific capacitance of 437.96 F g−1 at a current density of 0.5 A g−1 and demonstrated excellent cycling stability with 99.1% after 5000 cycles. These results indicate that rGO/MZxT nanocomposites based on an ilmenite-derived structure are promising candidates for high-stability next-generation supercapacitor electrodes. © 2026 Elsevier Ltd and Techna Group S.r.l. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Ibaraki, Tsukuba, 305-0044, Japan; Graduate School of Science and Technology, University of Tsukuba, 1-1-1, Tennodai, Ibaraki, Tsukuba, 305-8573, Japan; Research Center for Nanotechnology Systems, National Research and Innovation Agency (BRIN), Tangerang Selatan, 15314, Indonesia; Department of Chemical Engineering, Pamulang University (UNPAM), Pamulang, Banten, Tangerang Selatan, 15417, Indonesia; Graduate School of Informatics Engineering, Pamulang University (UNPAM), Pamulang, Banten, Tangerang Selatan, 15417, Indonesia; Research Center for Nanoscience and Nanotechnology, Bandung Institute of Technology (ITB), 40132, Indonesia; Lab on Chip Laboratory, Biomedical Engineering Department, School of Electrical Engineering and Informatics, Bandung Institute of Technology (ITB), Bandung, 40132, Indonesia; Department of Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Ibaraki, Tsukuba, 305-8573, Japan; Department of Nanotechnology, Graduate School of Multidisciplinary Science and Technology, Bandung Institute of Technology (ITB), Bandung, 40132, Indonesia; Department of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Johor Bahru, 81310, Malaysia; Research Center for Quantum Physics, National Research and Innovation Agency (BRIN), Tangerang Selatan, 15314, Indonesia; Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo 5-1-5, Kashiwanoha, Chiba, Kashiwa, 277-8561, Japan; Department of Informatics Engineering, Pamulang University (UNPAM), Pamulang, Banten, Tangerang Selatan, 15417, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Surabaya, Ketintang Campus, Surabaya, 60213, Indonesia; Material Science and Engineering Research Group, Faculty of Mechanical and Aerospace Engineering, Bandung Institute of Technology (ITB), Bandung, 40132, Indonesia
