Abstract
An exciting new area of research is the development of metal–organic framework (MOF)-based materials that exhibit desirable conductivity, vigorous redox activity, and a large specific surface area that can be used as electrodes in supercapacitors. However, upon direct application to electrode materials in supercapacitors, the MOFs exhibit insufficient electrical conductivity and unsatisfactory stability, thereby impeding the advancement of their electrochemical characteristics. In this study, we extensively examine the hydrothermally synthesized nickel/copper metal–organic framework (MOF) and its composite material, comprising nickel/copper MOF and polyaniline. The composite material was prepared using a physical blending process for the purpose of developing a high energy density supercapattery device. The specific capacity of the hydrothermally synthesized nickel/copper–MOF/PANI is observed to be 651 C g−1 under an initial current density of 1 A g−1 in a three-electrode electrochemical system. Due to its exceptional electrochemical properties, the as-synthesized composite is employed to construct battery-type electrodes for practical device production. This is achieved by combining it with a highly porous (activated carbon) electrode, which is separated by a cellulose paper. The assembled NiCu–MOF/PANI//AC device exhibited a specific capacity of 220 C g−1, along with an energy density of 60 W h kg−1, when subjected to a current density of 1 A g−1. The constructed device exhibited improved cyclic stability, maintaining a remarkable capacitance retention rate of approximately 94.8% even after undergoing 15,000 cycles. The potential applications of this composite electrode encompass high-performance supercapacitors, flexible electronics, and wearable technological devices.
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Muhammad Imran Bashir: Writing—original draft, Investigation, Formal analysis, Data curation, and Conceptualization. Faiza Anjum: Supervision, Resources, Investigation, and Conceptualization. Muhammad Imran: Visualization, Supervision, Resources, and Investigation. Hafiz Muhammad Fahad: Conceptualization, Data curation, and Validation. Falak Sher: Formal analysis, Methodology, Conceptualization, Investigation, and Writing—review and editing.
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Bashir, M.I., Anjum, F., Imran, M. et al. Facile synthesis of hybrid electrode by bimetallic MOFs/polyaniline composite for high-performance asymmetric supercapacitors. J Mater Sci: Mater Electron 35, 742 (2024). https://doi.org/10.1007/s10854-024-12496-6
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DOI: https://doi.org/10.1007/s10854-024-12496-6