3D-Printed MXenes for Supercapacitors

Worldwide commercialization of extremely stretchable and mechanically tenable self-powered electronic products with specially designed high-performance energy storage and conversion provisions has urged a tremendous need for revolutionalized printing technologies. To cope with this massive challenge, versatile 2D MXenes have been offered a significant consideration for the development of highly responsive ‘on-chip’ microsupercapacitors in recent times. The present chapter aims to highlight the recent advancements accomplished by these MXene printable inks employed for the smooth designing of 3D-printed ultracapacitors. Additionally, important topics like the tuning of the ink rheology, solvent characteristics on solidification rate as well as ink adherence to the substrate surface for ensuring excellent quality printed electrodes with preferred 3D structures, have also been highlighted. Moreover, fabrication approaches for different suspension types of additive-free, cost-effective MXene ink systems via facile techniques, with appreciably high chemical and colloidal stability, without compromising electronic conductivity, electrochemical behavior, or mechanical stability have also been focused.