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Interfacial Engineering of Ti3C2T MXene Electrode Using g-C3N4 Nanosheets for High-Performance Supercapacitor in
Manopat Depijan1, Kanit Hantanasirisakul2, Pasit Pakawatpanurut1
1Department of Chemistry, Center of Excellence for Innovation in Chemistry, and Center of Sustainable Energy and Green Materials, Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok 10400, Thailand.
Abstract:
The superior performance of the Ti3C2T (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-C3N4 (pg-C3N4) is incorporated into the Ti3C2T 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 Ti3C2T/pg-C3N4 film revealed an enhanced ion-accessibility and gravimetric capacitance of 140 F g-1 in 1 M aqueous MgSO4 electrolyte. The cyclic stability test also indicates excellent capacitance retention, with negligible loss of capacitance over 10000 cycles.
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