Superelastic supercapacitors with high performances during stretching.
Zhitao Zhang1, Jue Deng, Xueyi Li
1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai, 200438, China.
Advanced Materials (Deerfield Beach, Fla.)
|November 27, 2014
Summary
Researchers developed a highly stretchable fiber supercapacitor using carbon nanotube/polyaniline composite electrodes. This flexible energy storage maintains high capacitance even after extensive stretching and bending cycles.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Flexible and wearable electronics require efficient energy storage solutions.
- Traditional supercapacitors lack the mechanical robustness for dynamic applications.
Purpose of the Study:
- To develop a novel fiber-shaped supercapacitor with exceptional stretchability.
- To evaluate the electrochemical performance and durability of the stretchable supercapacitor.
Main Methods:
- Fabrication of fiber electrodes using aligned carbon nanotube/polyaniline composite sheets.
- Mechanical testing involving stretching over 400% and bending cycles.
- Electrochemical characterization including specific capacitance and cycling stability measurements.
Main Results:
- The fiber supercapacitor achieved a specific capacitance of approximately 79.4 F g(-1) at 300% strain.
- High capacitance retention (95.8%) was observed at a stretching speed of 30 mm s(-1).
- Excellent cycling stability was demonstrated, maintaining capacitance after 5000 stretching or bending cycles.
Conclusions:
- The developed fiber supercapacitor exhibits remarkable stretchability and electrochemical performance.
- This technology holds promise for next-generation wearable and flexible electronic devices.
- The composite electrode design offers a viable pathway for robust energy storage in dynamic systems.
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