Ke Li1,Valeria Nicolosi1
Trinity College Dublin1
2D MXenes have attracted tremendous interest due to their great potential in plenty of applications, especially for electrochemical energy storage, but still suffering from the serious restacking-caused low specific area and long ion diffusion pathways. Here we report a self-assembly method, which enables the construction of MXene hydrogels with porous structure and thus excellent electrochemical performance for supercapacitors, including a mass loading/thickness-independent rate capability and a high areal capacitance up to 3 F cm<sup>-2</sup>, surpassing most state-of-the-art supercapacitor electrodes.