Performance Comparison and Innovation Strategies in Energy Storage Technologies

With the increasing penetration of renewable energy, energy storage technologies have become fundamental to maintaining the stability and flexibility of modern power systems. This paper systematically reviews the current energy storage technologies, including electrochemical, physical, thermal, and electromagnetic systems. Electrochemical systems such as lithium-ion, sodium-ion, and flow batteries are analyzed with respect to their working mechanisms, performance characteristics, and application scenarios. Physical storage methods, including pumped hydro, compressed air, and flywheel systems, are evaluated for their scalability and long- duration storage capabilities. Thermal and electromagnetic storage technologies, including phase change materials, molten salts, and superconducting magnetic systems, are also discussed. A comparative analysis based on key parameters such as energy density, cycle life, response time, and technological maturity is provided. In addition, the paper examines recent advancements in highly stable electrode materials and solid-state electrolyte technologies, highlighting their potential to enhance storage performance and operational safety. The review concludes with an outlook on the development trends of energy storage technologies, emphasizing the necessity of multi-technology integration to support the evolving demands of low-carbon energy systems.