Development of MXene‐Enabled Titanium Carbide (TiC) Impurities‐Based Electrodes for the Fabrication and Circuit‐Level Testing of Gel‐Based Supercapacitors

Flexible and stretchable supercapacitors developed on MXene‐enabled Titanium Carbide (TiC) impurities‐based electrodes with novel electrolytes are the point of focus in this work. Five different electrodes are prepared with different TiC content and symmetric supercapacitors are fabricated with three electrolytes named acrylamide, N , N ′‐Dimethylacrylamide, and 2‐Hydroxyethyl methacrylate to achieve flexibility and improved energy storage. Before electrode fabrication, all the samples are tested with the X‐ray Diffraction technique. Cyclic voltammetry is performed at a potential window from −1 to 1 V to evaluate the specific capacitance of fabricated supercapacitors at multiple scan rates. Electrochemical impedance spectroscopy is performed to study the Randles circuit, and Rs values are calculated to examine the maximum physical area used for the evaluation of supercapacitors. Open‐circuit and short‐circuit tests are performed after charging the capacitor at 1 V for 2 min each time and compatibility of electrodes with different electrolytes is analyzed. The figures of merits for all the techniques used are discussed in detail. The highest values of the specific capacitances reported in our work are 50 and 79 F/g with novel electrolytes termed as N , N′ ‐Dimethylacrylamide and 2‐Hydroxyethyl methacrylate, respectively.