Hybrid supercapacitors combine the advantages of traditional supercapacitor and battery technologies, improving the energy density while maintaining the high power density and long lifespan of supercapacitors. Hybrid supercapacitor battery adopts different electrode materials. Usually, carbon-based materials are used for one electrode to enable rapid charge and discharge, while materials with higher energy density such as lithium or sodium are used for the other electrode, thus providing a longer energy release time. Compared with traditional supercapacitors, hybrid supercapacitors have a higher energy density, are suitable for applications that require higher energy and quick response, such as electric vehicles and smart grids, and also possess a longer service life and fast charging ability.