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Rational construction of spinel cobaltite/MXene composites towards superior interfacial charge dynamics for advanced
Komal Ali Rao1, Khizra Waheed1, Waqas Ahmad1
1Institute of Physics Bahauddin Zakariya University Multan-60800 Pakistan komalrao49@gmail.com.
None:
The layered structure, large surface area, superior electrical conductivity, and outstanding chemical stability of MXenes make them attractive innovative electrode materials for supercapacitors. The incorporation of nanoparticles, particularly bi- and tri-metallic transition metal oxides, is commonly used to enhance the interlayer accessibility and improve the electrochemical performance. Among various MXenes, Nb2CT x stands out as an excellent candidate for supercapacitor applications because of its unique properties, which collectively facilitate rapid charge transport and efficient ion storage. A hydrothermal method was used in this work to fabricate a MgCo2O4/MXene nanocomposite. FTIR spectroscopy and XPS investigations revealed the chemical bonding, functional groups and various oxidation states, while XRD analysis confirmed the crystalline properties and phase uniformity of MgCo2O4/MXene. SEM coupled with EDX revealed irregular platelet-like nanoparticles distributed on the MXene layers and confirmed the elemental composition. The optimized electrode yielded an excellent specific capacitance of 1257.75 F g-1 at 1 A g-1 with a maximum cycling stability of 88.15% after 10 000 cycles. This research study illustrates a facile hydrothermal route for the synthesis of MXene-based nanocomposites with particles of controllable size for high-performance supercapacitor electrodes.
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