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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
Summary
Researchers engineered a supercapacitor electrode by combining MXene nanosheets with protonated carbon nitride to improve energy storage performance in neutral electrolytes. The modified electrode showed significantly increased capacitance and stability compared to plain MXene. While not directly about microplastics, this materials science advancement contributes to sustainable energy storage technologies that could support environmental monitoring and remediation efforts.
The superior performance of the Ti3C2Tx (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 Ti3C2Tx 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 Ti3C2Tx/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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