Supercapacitors

Supercapacitors (also referred to as “supercaps” or ultracapacitors) are becoming increasingly important in modern energy supply systems. While conventional energy storage systems such as batteries are primarily designed to store the highest possible amount of energy and traditional capacitors are capable of delivering very high power within a short time, supercapacitors bridge the gap between these two technologies. They combine a comparatively high energy density with an exceptionally high-power density, enabling both rapid charging and discharging processes as well as reliable short-term energy supply.

These properties make supercaps particularly attractive for applications where fast energy pulses, a high number of charge and discharge cycles, and long service life are essential – for example in industrial systems, uninterruptible power supplies, mobility applications, or the integration of renewable energies. In addition, compared to many battery technologies, they are considered more environmentally friendly because they do not rely on rare or difficult-to-recycle materials.

This whitepaper therefore focuses on the technological fundamentals, operating principles, and application possibilities of supercapacitors. Its objective is to provide a better understanding of this key technology and to highlight its advantages and differences compared to conventional energy storage systems.