A Review on MXene-Based Textile Materials for Flexible Energy Storage Application

The revelation of MXenes as two-dimensional (2D) transition metal carbides and nitrides, in the midst of their exceptional features like rich surface chemistry, tunable terminations, metallic conductivity, and exceptional processability, has completely changed the realm of material chemistry research. The introduction of MXene has been contributive to the design and development of various textile e-devices. Among these, textile-based supercapacitors (TSCs), which encompass fiber, yarn, and fabric supercapacitors, are developed and have been manifested to be useful in powering wearable electronics. The present article summarizes historical developments of energy storage devices, types of super-capacitors like double-layered capacitors, hybrid capacitors, and pseudo-capacitors, their relative merits and demerits. Various top-down and bottom-up approaches of MXene synthesis processes are discussed with their scopes and limitations. Different process of coating/loading of MXene onto textile substrates viz. dip coating, electro-spinning and wet spinning are described and morphological cum surface characteristics of the developed coated textiles are highlighted. Mechanical and electrical properties of MXene based textiles have been summarized and compared with various other electro-conductive textiles prepared from conductive polymers, CNTs, and rGO. The performance of MXene-based textiles for energy storage applications is critically reviewed and summarized.