Enhanced electrochemical performance of vanadium carbide MXene composites for supercapacitors
Syedah Afsheen Zahra,
Babak Anasori,
Muhammad Z. Iqbal,
Florent Ravaux,
Mohammednoor Al Tarawneh,
Syed Rizwan
Affiliations
Syedah Afsheen Zahra
Physics Characterization and Simulations Lab (PCSL), Department of Physics, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
Babak Anasori
Department of Mechanical and Energy Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, USA
Muhammad Z. Iqbal
Department of Chemical and Petroleum Engineering, United Arab Emirates University, P.O. Box 15551, Al-Ain, United Arab Emirates
Florent Ravaux
Department of Physics, Khalifa University, Abu Dhabi, United Arab Emirates
Mohammednoor Al Tarawneh
Department of Chemical and Petroleum Engineering, United Arab Emirates University, P.O. Box 15551, Al-Ain, United Arab Emirates
Syed Rizwan
Physics Characterization and Simulations Lab (PCSL), Department of Physics, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
Two-dimensional (2D) surface-terminated layered transition metal carbide MXenes with high electrochemical performance paved the way for robust energy storage supercapacitor devices. However, because of the 2D nature of the MXene flakes, self-restacking of 2D MXene flakes limits the use of all the flake functionalized surfaces in MXene electrodes. Here, we report the synthesis of V2CTx MXene and multiwall carbon nanotube (MWCNT)/V2CTx composites as a promising electrode material for hybrid energy storage devices. Our hybrid electrodes exhibited enhanced electrochemical performance and a gravimetric capacitance of 1842 F g−1 at a scan rate of 2 mV s−1, with a specific charge capacity of 62.5 A h/g. Moreover, the electrodes presented an excellent rate performance, durability, and retention capacity of 94% lasted up to 10 000 cycles. Density functional theory calculations provided electronic and structural properties of the considered MWCNT@V2CTx. Therefore, the introduction of MWCNTs enhanced the conductivity and reaction kinetics of the MXenes and facilitates the charge storage mechanism useful for next-generation smart energy storage devices.
