Nano Coatings and Thin Films of 2D Nanomaterials (MXenes) as Transparent Conductivity Electrodes and Supercapacitors

Abstract

Owing to the extensive demand for the flexible, wearable, and smart electronics, the energy storage/conversion gadgets have been on rise. Transparent conductive electrodes have been a crucial element in interactive devices like touch panels and smart phones. Future generation electronics essentially need development of transparent supercapacitors for power storage. Very recent, MXenes, a class of 2D materials are attracting worldwide research because of its outstanding electronic conductivity, particularly in the field of energy storage. Essentially, development of transparent supercapacitors needs high-performance TCEs as a prerequisite. The aspects of MXenes thin film synthesis techniques, assessment metrics, performance of flexible TCEs and supercapacitors, and its limitations and remedies are comprehensively discussed in this review. Majorly, the basic essentials in TCEs like conductivity features, percolations, and figure of merit are addressed. Particular attention is paid for transparent MXene films which form a base for transparent supercapacitors. Eventually, a comprehensive discussion over the applications of MXene-based transparent supercapacitors and TCEs, their challenges and prospects, and the shortcomings are presented.