Related Experiment Video
Updated: May 20, 2026
12:00
Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
High performance of a solid-state flexible asymmetric supercapacitor based on graphene films
Bong Gill Choi1, Sung-Jin Chang, Hyun-Wook Kang
1Division of Materials Science, Korea Basic Science Institute, Daejeon, 305-333, Republic of Korea.
Nanoscale
|July 4, 2012
Summary
Researchers developed flexible solid-state asymmetric supercapacitors using functionalized graphene and ruthenium oxide films. These devices offer high energy and power density, crucial for portable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Flexible electronics require integrated solid-state energy storage solutions.
- Existing devices often compromise performance for flexibility.
Purpose of the Study:
- To fabricate and optimize solid-state flexible asymmetric supercapacitors.
- To evaluate their electrochemical performance and mechanical stability.
Main Methods:
- Fabrication of ionic liquid functionalized-chemically modified graphene (IL-CMG) films for negative electrodes.
- Development of hydrous RuO(2)-IL-CMG composite films for positive electrodes.
- Integration with polyvinyl alcohol-H(2)SO(4) electrolyte and direct flow self-assembly for ordered structures.
Main Results:
- Optimized asymmetric supercapacitors achieved a 1.8 V cell voltage.
- High energy density (19.7 Wh kg(-1)) and power density (6.8 kW g(-1)) were demonstrated.
- Excellent performance retention (79.4% capacitance at 10 A g(-1)) and cycling stability over 2000 cycles under mechanical stress.
Conclusions:
- The developed supercapacitors offer a promising platform for high-performance flexible energy storage.
- Simple cell configuration enables new design opportunities for portable electronic devices.
- The materials demonstrate potential for combining high energy/power densities with long-term stability.
