Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.478
Publication date: 16th December 2024
The surface chemistry, structure, and morphology of MXenes play a critical role in their applications. Various methods of covalent functionalization have been reported, demonstrating significant improvements over pristine MXenes terminated with hydroxyl and fluorine functional groups. Furthermore, the direct conversion of MXenes into various chalcogenides, while retaining their original structure, can significantly enhance properties such as hydrogen and oxygen evolution overpotentials, as well as the capacitance of the material for electrochemical energy storage. Chemical functionalization, such as the introduction of charged zwitterionic compounds and defect engineering, has been shown to significantly improve the performance of MXenes in energy storage applications. Treating MXenes with different reagents, such as elemental chalcogens or pnictogens, effectively modifies their surface functionalization and can lead to the formation of composite materials. These composites, consisting of functionalized MXenes and transition metal dichalcogenides, exhibit significant enhancements in capacitance for supercapacitors and lithium-ion batteries. By leveraging specific chemical transformations, MXenes containing vanadium, niobium, and molybdenum can be converted into chalcogenides or vanadates/niobates. These processes pave the way for the development of advanced materials with promising applications in photocatalysis, supercapacitors, and batteries.
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