Asymmetric supercapacitors: Unlocking the energy storage revolution

New electronic and optoelectronic devices are proliferating all over the world right now, necessitating the development of more dependable power sources with better energy densities and longer lifespans. Supercapacitors now rank among the excellent energy-storage technologies due to their numerous benefits, including high power, quick charging and discharging, and prolonged cyclic stability. Researchers are now looking into new kinds of supercapacitors with higher performance because existing supercapacitors' extremely low energy density significantly restricts their vast range of applications. A wide operational voltage window is a particular benefit of asymmetric supercapacitors (ASCs) built with two different electrode materials, which considerably improves energy density. A detailed examination of the materials created for ASC electrodes, as well as the advancements made in the fabrication of ASC devices over the past few decades, are covered in this critical analysis of recent developments in the field of ASCs. Furthermore covered are current difficulties and the field of ASCs' prospects for the future.