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Binder-free 2D MXene/activated carbon for High-performance Supercapacitors and Methylene Blue Adsorption
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  • YUE LI,
  • kamdem pascal,
  • lanshu xu,
  • xiaojuan jin
kamdem pascal
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xiaojuan jin
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we have assembled the 2D MXene flakes and acid activated carbon (AAC) into a 3D sandwich architecture expected to avoid the serious restacking problem of 2D MXene flakes and develop MXene-based functional materials. When used for energy storage, 2D MXene, as a flexible, conductive and electrochemically active binder, furnishes a new perspective and possibility to assemble flexible and conductive electrodes without any current collector, binders or conductive additives. The flexible MXene/AAC 2:1 electrode delivers the specific capacitance of 378 F g-1 at 0.5 A g-1 and a capacitance retention of 88.9% at 30 A g-1. Impressively, asymmetrical supercapacitors have been assembled with MXene/AAC hybrids as positive electrode and delivers exceptional electrochemical properties. The MXene/AAC 2:1//AAC achieves 177 F g-1 at 0.5 A g-1, 97.4% retention after 10000 circles of GCD measurements at 5 A g-1. Moreover, the 3D sandwich architecture of MXene/AAC hybrids with great specific surface exhibits noteworthy absorption