Abstract:
The two-dimensional (2-D) Ti3C2 is frequently cited as a promising material for pseudocapacitive
electrodes. This study shows the impact of alkali metals on titanium carbide. We use a NaF
precursor to accomplish this, but when we make the sample, we discover that Na is not doped in
Ti3C2, therefore NaF acts as a composite in Ti3C2. Ti3C2/NaF composites are made using a
conventional hydrothermal process. It was possible to manufacture a Ti3C2/NaF composite with a
NaF fraction of 1-20% by rationally controlling the NaF concentrations. More intriguingly, we
prepare six sample with various concentrations (1%, 3%, 5%, 10 and 20%) under ideal conditions.
The structural analysis of our best samples can be seen in XRD, where the Ti3C2 and NaF peaks
confirm our conclusion that composition is happening. Further SEM morphological examination
reveals that the NaF is positioned above the surface of the Ti3C2 to further clarify composition.
Then, in optical examination, the peaks of Ti3C2 in the range of 150–300 cm-1 and NaF in the
region of 400–600 cm-1 are clearly visible. The resulting Ti3C2 materials based on NaF composites
showed considerably enhanced specific capacitances of 191 F/g at scan rates of 2 mV/s in 1M
KOH. We examine the effects of washing and without washing as part of the preparation procedure
in order to determine how they affect the value of a specific capacitance. Our capacitance was only
21.6F/g without washing, but when we prepared the sample by including the washing step, our
capacitance increase up to 47F/g. We also look at the EIS and GCD in terms of electrochemical
characteristics. In EIS, the impedance factor rises when the amount of NaF in Ti3C2 is increased.
In the GCD, we observe that the device eventually enters an overcharge state (also known as the
saturation region), thus to solve this issue, we reduce the voltage window.
