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Korea Introduces Groundbreaking Supercapacitors That Charge on Their Own
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Posted by Okachinepa on 12/31/2024 @


Courtesy of SynEvol
Credit: DGIST
Senior researcher Jeongmin Kim of DGIST and Damin Lee of Kyungpook National University's RLRC have created a novel self-charging energy storage device that effectively stores solar energy. Through the integration of transition metal-based electrode materials, this novel technology dramatically improves the performance of conventional supercapacitors. The group also unveiled a brand-new energy storage system that combines solar cells and supercapacitors.
The researchers used a carbonate and hydroxide composite material based on nickel to create electrodes in order to do this. They increased conductivity and stability by adding transition metal ions like manganese (Mn), cobalt (Co), copper (Cu), iron (Fe), and zinc (Zn). These developments have pushed the limits of energy storage technology by producing notable gains in energy density, power density, and the general stability of charge and discharge cycles.
In particular, this study's energy density of 35.5 Wh/kg is a significant increase over earlier research's energy storage per unit weight of 5–20 Wh/kg. With a power density of 2555.6 W/kg, it greatly outperforms the numbers from earlier research (-1000 W/kg), indicating the capacity to release more power quickly and providing an instant energy source even for high-power equipment. Furthermore, the device's long-term usability was confirmed by the low loss in performance during repeated cycles of charging and discharging.
Additionally, the study team created an energy storage device that combines supercapacitors and silicon solar cells to create a system that can store solar energy and use it instantly. This system successfully validated the possibility for commercializing the self-charging energy storage device with an overall efficiency of 5.17% and an energy storage efficiency of 63%.
"This study is a significant achievement, as it marks the development of Korea's first self-charging energy storage device combining supercapacitors with solar cells," says Jeongmin Kim, Senior Researcher at DGIST's Nanotechnology Division. We have provided a sustainable energy solution by overcoming the drawbacks of energy storage devices through the use of transition metal-based composite materials. “We will continue to conduct follow-up research to further improve the efficiency of the self-charging device and enhance its potential for commercialization,” said Damin Lee, a researcher at Kyungpook National University’s RLRC.
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