The article reviews the current status and future prospects of supercapacitors, a hybrid electrochemical energy storage device that combines the advantages of both rechargeable batteries (RBs) and supercapacitors (SCs). Supercapacitors offer high power density and numerous charge-discharge cycles but lag behind RBs in energy density. The review discusses the different types of electrochemical energy storage devices, including EDLCs, PCs, and RBs, and how supercapacitors bridge the gap between these technologies. It covers the properties, design strategies, and electrochemical characterization of supercapacitors, emphasizing their unique characteristics and performance metrics. The article also highlights the importance of selecting appropriate electrode materials and electrolytes to optimize the performance of supercapacitors. Finally, it provides a perspective on the future of supercapacitors, noting their potential to revolutionize energy storage in various applications, including renewable energy, portable electronics, and electric vehicles.The article reviews the current status and future prospects of supercapacitors, a hybrid electrochemical energy storage device that combines the advantages of both rechargeable batteries (RBs) and supercapacitors (SCs). Supercapacitors offer high power density and numerous charge-discharge cycles but lag behind RBs in energy density. The review discusses the different types of electrochemical energy storage devices, including EDLCs, PCs, and RBs, and how supercapacitors bridge the gap between these technologies. It covers the properties, design strategies, and electrochemical characterization of supercapacitors, emphasizing their unique characteristics and performance metrics. The article also highlights the importance of selecting appropriate electrode materials and electrolytes to optimize the performance of supercapacitors. Finally, it provides a perspective on the future of supercapacitors, noting their potential to revolutionize energy storage in various applications, including renewable energy, portable electronics, and electric vehicles.