Batteries and Supercapacitors

Batteries and supercapacitors are essential energy storage technologies supporting renewable energy integration, electric mobility, and portable electronics. Batteries store energy through electrochemical reactions and offer high energy density, making them suitable for long-term energy storage in electric vehicles and grid applications. Common types include lithium-ion, sodium-ion, and solid-state batteries. Supercapacitors store energy electrostatically and are characterized by high power density, rapid charge–discharge capability, and long cycle life. They are ideal for applications requiring fast energy delivery, such as regenerative braking and power smoothing. Research focuses on improving materials, safety, lifetime, and sustainability while reducing cost. Hybrid systems combining batteries and supercapacitors leverage the advantages of both technologies. Together, batteries and supercapacitors are central to flexible, reliable, and low-carbon energy systems.