Chonnam National University Kim Dohyeong Research Team Proposes Quantitative Standards for Hybrid ESS

Chonnam National University research team led by Kim Dohyeong
clearly defines the concept of "supercapattery"
and quantitatively distinguishes it from existing hybrid energy storage devices

Chonnam National University announced on the 10th that the research team led by Professor Kim Dohyeong from the Department of Chemical Engineering has clearly defined the concept of the next-generation energy storage technology known as "supercapattery," and quantitatively analyzed the differences between supercapattery and existing hybrid energy storage devices.

While conventional supercapacitors offer high power density, batteries provide high energy density.

However, with the advancement of electric vehicles and cutting-edge electronic devices, there is increasing demand for next-generation energy storage technologies that can deliver both high power and high energy simultaneously. In response to this need, supercapatteries have been developed, but the lack of clear distinction from existing hybrid energy storage devices has caused confusion in both academia and industry.

To address this, Professor Kim Dohyeong's research team systematically analyzed the concept of "supercapattery" and presented quantitative criteria for objectively distinguishing supercapatteries from existing hybrid devices using the Ragone plot.

Additionally, the research team conducted an in-depth analysis of strategies for achieving high energy and high power in supercapatteries from an electrochemical perspective and proposed solutions to key technological challenges hindering commercialization.

This study was jointly conducted by Professor Kim Dohyeong (corresponding author), postdoctoral researcher Seenivasan Selvaraj, research professor Sangeeta Adhikari, and doctoral student Amarnath T. Sivagurunathan, with support from the National Research Foundation of Korea.

The significance of this research lies in the clear establishment of quantitative criteria to distinguish supercapatteries from existing hybrid devices. Furthermore, it is important for both academia and industry as it evaluates the high commercialization potential of supercapatteries and suggests directions for future energy storage technologies.

The paper was published in the February 2025 issue of RSC Energy & Environmental Science (impact factor 32.4), the most prestigious international journal in the field of chemical engineering.