Recent progress in the all?solid?state flexible supercapacitors

In the past few years, supercapacitors (SCs) have attracted great attention in both academic and industrial sectors due to their high energy storage efficiency, reliable stability, eco-friendly process. Flexible solid-state SCs as one of ongoing focuses for development wearable portable electronics become most promising devices smart power system density, fast electrochemical response, efficiency on charge-discharge process, excellent stability. this study, recent progress electrodes electrolytes used approaching high-performance all-solid-state flexible is reviewed. We first introduce basic operational principles various SCs. And then we overview electrode materials including carbon materials, conducting polymers, transition metal oxides/chalcogenides/nitrides, MXenes, metal-organic frameworks, covalent-organic polymer-based different systems. Afterward, summarize outlook future research directions.