Ultraflexible and tailorable all-solid-state supercapacitors using polyacrylamide-based hydrogel electrolyte with
1Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering and Institute of Advanced Study, Tongji University, Shanghai, 200092, China. tchen@tongji.edu.cn.
Nanoscale
|November 22, 2017
Summary
Researchers developed flexible polyacrylamide hydrogels for solid-state supercapacitors. These ionic conducting hydrogels enable high-performance, durable energy storage devices for wearable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Hydrogels offer high ionic conductivity for solid-state supercapacitors.
- Few flexible supercapacitors utilizing ionic conducting hydrogel electrolytes have been reported.
- Developing mechanically robust and flexible electrolytes is crucial for advanced energy storage.
Purpose of the Study:
- To synthesize highly flexible and ionic conducting polyacrylamide hydrogels.
- To fabricate and evaluate all-solid-state supercapacitors using these novel hydrogel electrolytes.
- To demonstrate the potential of these supercapacitors for wearable energy storage applications.
Main Methods:
- Simple synthesis approach for polyacrylamide hydrogels.
- Fabrication of all-solid-state supercapacitors with hydrogel electrolytes.
- Testing of electrochemical performance, including specific capacitance and self-discharge.
- Evaluation of mechanical stability through bending, knotting, and kneading cycles.
Main Results:
- Achieved highly flexible and ionic conducting polyacrylamide hydrogels.
- Supercapacitors exhibited high specific capacitance and low leakage current.
- Demonstrated a long self-discharge time (over 10 hours to half open-circuit voltage).
- Supercapacitors maintained performance after 5000 cycles of mechanical stress (bending, knotting, kneading).
Conclusions:
- The synthesized polyacrylamide hydrogels are suitable electrolytes for high-performance all-solid-state supercapacitors.
- These supercapacitors possess excellent flexibility, mechanical stability, and long-term operational reliability.
- The developed technology offers an efficient route for fabricating wearable energy storage devices.
