Interfacial Engineering of Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene Electrode Using g-C<sub>3</sub>N<sub>4</sub> Nanosheets for High-Performance Supercapacitor in Neutral Electrolyte
Manopat Depijan, Kanit Hantanasirisakul, Pasit Pakawatpanurut
Abstract
High Resolution Image Download MS PowerPoint Slide The superior performance of the Ti 3 C 2 T x (MXene)-based supercapacitor in acidic electrolytes has recently gained much interest in the energy storage community. Nevertheless, its performance in most neutral electrolytes is unfavorably low, plausibly due to limited ion diffusion between the MXene layers. Herein, protonated g-C 3 N 4 (pg-C 3 N 4 ) is incorporated into the Ti 3 C 2 T x electrode by using a facile self-assembling process and annealing, which results in increased interlayer d -spacing and electrical conductivity of the composite electrode. As a result, the annealed Ti 3 C 2 T x /pg-C 3 N 4 film revealed an enhanced ion-accessibility and gravimetric capacitance of 140 F g –1 in 1 M aqueous MgSO 4 electrolyte. The cyclic stability test also indicates excellent capacitance retention, with negligible loss of capacitance over 10000 cycles.