Solar-powered charging: Self-charging supercapacitors developed

The research team designed the electrode using nickel-based carbonate and hydroxide composite materials, and maximized the conductivity and stability of the electrode by adding transition metal ions such as Mn, Co, Cu, Fe and Zn. This technology greatly improves the performance of energy storage components, showing significant progress in energy density, power density and charge and discharge stability.

In particular, the energy density achieved in this study is 35.5 Wh kg-1, which is significantly higher than the energy storage per unit weight in previous studies (5-20 Wh kg-1). The power density is 2555.6 W kg-1, which greatly exceeds the previous research value (-1000 W kg-1), demonstrating the ability to quickly release higher power, enabling instant power supply even for high-power devices. Furthermore, performance showed minimal degradation during repeated charge and discharge cycles, confirming the long-term usability of the device.

In addition, the research team also developed an energy storage device that combines silicon solar cells with supercapacitors, creating a system that can store solar energy and use it instantly. The system achieved an energy storage efficiency of 63% and a comprehensive efficiency of 5.17%, effectively verifying the commercialization potential of self-charging energy storage devices.

Jeongmin Kim, senior researcher at DGIST’s Nanotechnology Division, said: “This research is a significant achievement as it marks the development of Korea’s first self-charging energy storage device that combines supercapacitors with solar cells. By utilizing transition metals Based on composite materials, we overcome the limitations of energy storage devices and propose sustainable energy solutions, said Damin Lee, RLRC researcher at Kyungpook National University, “We will continue to conduct follow-up research to further improve the efficiency of self-charging devices. Enhance its commercialization potential. “

This research was conducted with support from the DGIST Institutional Core Program, the Early Career Researcher Program, and the Regional Leading Research Center for Carbon-Neutral Smart Energy Systems at Kyungpook National University. Research results published in journal vitality December.