Superconducting flywheel energy storage (SFES) integrates these technologies, enhancing the advantages of both. The utilization of superconducting materials allows for virtually frictionless rotation, resulting in an exceptionally efficient means of storing energy. This is where electrical current can flow without resistance at very low temperatures. Image Credit: Anamaria Mejia/Shutterstock. Efficient energy storage solutions, 2. Enhanced durability and lifespan compared to traditional systems, 3. Minimal maintenance. . Flywheel energy storage (FES) works by spinning a rotor (flywheel) and maintaining the energy in the system as rotational energy.