Fast assembly of MXene hydrogels by interfacial electrostatic interaction for supercapacitors

A simple and fast method for preparing MXene hydrogels is proposed by introducing protonated thionine molecules into a MXene dispersion through electrostatic interaction. Such a 3D hydrogel effectively suppressed restacking and oxidation, and enlarged the surface utilization of the MXene, producing an improved specific capacitance of 163 F g(-1) at 1 A g(-1) and excellent stability when used as an electrode material for supercapacitors.

Automated summary

A simple and fast method of preparing MXene hydrogels by introducing protonated thionine molecules into a MXene dispersion has been proposed in this study. The 3D hydrogel effectively suppresses restacking and oxidation of MXene, leading to improved specific capacitance and excellent stability when used as an electrode material for supercapacitors.