Abstract:
Electrochemical Capacitors and Hydrogen production through water splitting into constituent
H2 and O2 is a captivating way out for long-lasting energy storage. Developing an efficient and
versatile nanocomposite from earth-abundant elements that is stable and active for storing
energy and conversion is pivotal with regards to cost and convenience to simplify the overall
system design. This thesis presented a simple, cheap and one step synthesis of Cobalt-doped
Vanadium Carbide MXene (Co@V2CTx) nanocomposite through co-precipitation method , to
be utilized as an effective, durable, and stable electrode for supercapacitor and as an
electrocatalyst for water electrolysis. In 1M KOH, the Co@V2CTx nanocomposite supported
on a nickel form produced at 2mVs-1, a capacitance of 1259Fg-1. Also, its specific charge
capacity is 82.2 Ahg-1, energy, and power density of 26.7Whkg-1 and 325Wkg-1 respectively
at 1Ag-1 current density. In addition, the Co @V2CTx nanocomposite shows excellent HER and
OER catalytic activity exhibiting a minimal overpotential of 103mV and 170mV respectively at
10mAcm-2 and Tafel slope of 83mVdec-1 for HER and 145mVdec-1 for OER, which is
comparable to commercial Platinum catalyst. This excellent performance of Co@V2CTx
nanocomposite may be due to the synergistic effects produced when Cobalt is intercalated
into Vanadium Carbide MXene. This thesis features an easy, cheap, and effective method to
synthesis MXene-based nanocomposite for application for energy storage and conversion.
Key words: Supercapacitor, Synergetic, Hydrogen Evolution Reaction, Overpotential, Specific
capacitance.
