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Efficient electrochemical performance of electrostatically self-assembled Nb2CTx/AgNPs-CTAB nanocomposite in both basic and neutral electrolytes

Among the family of two-dimensional (2D) MXenes, Nb2CTx MXene has attracted great intentions in the field of energy storage devices due to their high electroconductivity and wettability as compared to titanium carbide-based MXenes. However, the properties of pristine Nb2CTx MXene are further improve...

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Published in:Journal of energy storage 2024-05, Vol.88, p.111629, Article 111629
Main Authors: Ali, Irfan, Zahra, Syeda Afsheen, Sajid, Imran Haider, Rizwan, Syed
Format: Article
Language:English
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Summary:Among the family of two-dimensional (2D) MXenes, Nb2CTx MXene has attracted great intentions in the field of energy storage devices due to their high electroconductivity and wettability as compared to titanium carbide-based MXenes. However, the properties of pristine Nb2CTx MXene are further improved by fabricating its composite materials, herein a nanocomposite (Nb2CTx/AgNPs-CTAB) was prepared through an electrostatically self-assembled method, for high-performance electrochemical energy storage electrode. The nanocomposite is fabricated by decorating the surface of negatively charged Nb2CTx MXene nanosheets with positively charged cetyltrimethylammonium bromide (CTAB) capped silver nanoparticles (AgNPs-CTAB). Zeta potential, X-ray diffraction, UV–visible, thermal gravimetric analysis, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, BET, and Raman spectroscopy were performed to characterize the as-synthesized Nb2CTx/AgNPs-CTAB nanocomposite. Our as-prepared composite material shows better electrochemical performance than pristine Nb2CTx MXene due to synergistic interfacial effects. The electrochemical properties of the electrode material were studied in 1 M KOH (651 F/g and 285 F/g at 5 mV/s) and 1 M Na2SO4 (201 F/g and 44 F/g at 5 mV/s) electrolytes for nanocomposite and pristine MXene respectively. These results reveal that the Nb2CTx/AgNPs-CTAB nanocomposite shows high specific gravimetric capacitance in both electrolytes compared to their pristine Nb2CTx MXene. Moreover, the asymmetric device was assembled by using activated carbon and nanocomposite material (AC/Nb2CTx/AgNPs-CTAB), which delivers a high energy density of 18.0 Wh/kg and 20.3 Wh/kg at the current density of 1 A/g at different potential windows 1.1 V and 1.6 V respectively in 1 M KOH and 1 M Na2SO4 electrolytes. These findings may prove helpful in extending the research extensively in the field of energy storage systems to explore the properties of the Nb2CTx MXene-based nanocomposites in various electrolytes. [Display omitted] •The Nb2CTx/AgNPs-CTAB nanocomposite was prepared using an electrostatically self-assembled method.•Our as-prepared nanocomposite shows excellent thermal stability as compared to pristine Nb2CTx MXene.•The Nb2CTx/AgNPs-CTAB nanocomposite exhibited efficient electrochemical performance in both KOH & Na2SO4 electrolytes.
ISSN:2352-152X
2352-1538
DOI:10.1016/j.est.2024.111629