MXene-carbon composites have garnered attention for their exceptional electrochemical properties, with specific capacitances exceeding 1500 F/g at scan rates of 10 mV/s. The synergistic effect between MXenes' metallic conductivity (~6000 S/cm) and carbon's high surface area (>2000 m²/g) enables ultrahigh energy densities of up to 50 Wh/kg in supercapacitors. Recent work has demonstrated cycling stability over 10,000 cycles with capacitance retention above 95%.
These composites are also being explored for electromagnetic interference (EMI) shielding applications. By combining MXenes' intrinsic conductivity with carbon's dielectric properties, researchers have achieved shielding effectiveness (SE) values exceeding 60 dB at thicknesses as low as 1 µm. This performance surpasses traditional materials like copper and aluminum while offering lightweight flexibility.
In catalysis, MXene-carbon hybrids have shown remarkable activity for hydrogen evolution reactions (HER), with overpotentials as low as 50 mV at current densities of 10 mA/cm². The incorporation of transition metal carbides into the carbon matrix enhances active site density by up to an order of magnitude compared to standalone catalysts.
Scalable fabrication techniques like vacuum filtration and spray coating have enabled the production of large-area MXene-carbon films with tunable thicknesses ranging from nanometers to micrometers. These films are being integrated into flexible electronics and wearable sensors, offering unprecedented mechanical robustness and electrical performance.
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