Scientists have long studied energy storage. Approaches vary and include bicarbonate, reservoirs, lithium batteries, and other components. However, the efficiency and durability of these systems after charging continue to pose challenges. Recently, researchers in South Korea developed a promising solution featuring self-charging capabilities.
The study. A research team from South Korea’s Daegu Gyeongbuk Institute of Science and Technology and Kyungpook National University recently created a high-performance self-charging solar energy storage system. This device aims to enhance the storage capacity and durability of existing technologies.
How does it work? Researchers developed a device that can store solar energy and use it efficiently. Notably, the system integrates two technologies into one unit: supercapacitors, which function like fast-charging batteries, and solar panels. This integration allows the system to simultaneously capture solar energy, store it, and utilize it when needed. Additionally, its self-charging ability and minimal degradation during repeated use ensure a long service life.
Image: Kyungpook National University
Technical overview. The device features a self-charging system that combines high-performance supercapacitors with silicon solar cells. Supercapacitors utilize advanced electrode materials, specifically a nickel-based carbonate and hydroxide composite, enhanced with transition metal ions (such as Mn, Co, Cu, Fe, and Zn).
The design has significantly improved energy density (35.5 Wh/kg) and power density (2,555.6 W/kg), demonstrating high stability during charge and discharge cycles. Moreover, when solar cells are paired with supercapacitors, the system boasts a storage efficiency of 63% and an overall efficiency of 5.17%.
60% efficiency. The research team’s journey to achieving this level of efficiency has been extensive, spanning solar panels to storage devices. Interestingly, a compressed air energy storage project in Jintan in Eastern China also reached this efficiency milestone. The Chinese project successfully captured and reused the heat generated during air compression, eliminating the need for external fuels and significantly reducing carbon emissions. Additionally, its rapid five-minute start-up time enhances the system’s responsiveness.
The South Korean study’s authors say this will be the first device in the country to integrate supercapacitors with solar cells. By addressing the limitations of current technologies through the use of advanced composite materials, the research work offers a sustainable energy solution that has the potential to revolutionize solar energy storage and usage. Researchers also indicated that the team will focus on improving efficiency and expanding the device’s commercialization potential.
Image | Kumpan Electric
Related | The U.S. and Europe Are Interested in Nuclear Energy Again. The Problem: They Depend on Russia
View 0 comments