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Synergistic Dual-Cross-Linking Gelation: Exploring the Impact of Metal-Ligand Complexation on Ionogel Performance
Jin Han Kwon1, Seong Hyuk Hong2, Gyeong Rok Lee2
1Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
ACS Applied Materials & Interfaces
|October 23, 2024
Summary
This study introduces dual-cross-linked ionogels that enhance mechanical strength and thermal stability without sacrificing ionic conductivity, ideal for wearable ionotronics and advanced displays.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Growing demand for ionogels in wearable ionotronics necessitates improved mechanical and electrochemical properties.
- Existing ionogels face a trade-off between mechanical robustness and ionic conductivity.
- Developing ionogels with enhanced performance is crucial for next-generation electronic devices.
Purpose of the Study:
- To develop physically/chemically dual-cross-linked ionogels.
- To enhance mechanical strength and thermal stability without compromising ionic conductivity.
- To investigate the impact of metal-ligand complexation on ionogel performance.
Main Methods:
- Fabrication of dual-cross-linked ionogels using metal-ligand complexation within physically cross-linked domains.
- Systematic examination of various metal ions, particularly Co3+, to determine optimal complexation.
- Characterization of mechanical resilience, thermal stability, and ionic conductivity.
Main Results:
- Dual-cross-linked ionogels exhibited significantly enhanced mechanical resilience and thermal stability, especially with Co3+.
- Ionic conductivity remained comparable to pristine ionogels, as complexation occurred in non-conductive domains.
- Successful application of ionogels in alternating-current electroluminescent displays (ACEDs).
Conclusions:
- Physically/chemically dual-cross-linked ionogels offer a viable strategy to overcome the mechanical-conductivity trade-off.
- Metal-ligand complexation, particularly with high-coordination-number ions like Co3+, effectively enhances ionogel properties.
- The developed ionogels are suitable for advanced applications like multicolor ACEDs with frequency control.
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