Abstract

With the increasing interest in wearable smart electronics, flexible energy storage devices, particularly the safe and fast-charge flexible supercapacitors (FSCs), are greatly stimulated in recent years. Two-dimensional (2D) and layered materials with superior capacitive merits and flexible nature are ideal electrode candidates for FSCs. This chapter is devoted to a comprehensive review of the recent progress in engineering 2D materials for FSCs, highlighting the recent significant achievements, challenges, and resolutions to advance the future development on this hot topic. The electrochemical mechanisms, hybrid nanostructures, and structure–performance optimization of FSCs based on these novels, unique, and high-performance 2D materials are intensively discussed. Diverse fabrication strategies related to FSCs are compared. Furthermore, future directions, opportunities, and critical challenges related to 2D materials-based FSCs are provided for the fascinating practical application of next-generation supercapacitors.