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Robustly and Intrinsically Stretchable Ionic Gel-Based Moisture-Enabled Power Generator with High Human Body
Wenya He1, Puying Li1, Haiyan Wang1
1Laboratory of Flexible Electronics Technology, Key Laboratory of Organic Optoelectronics & Molecular Engineering, Ministry of Education, Department of Chemistry, State Key Laboratory of Tribology in Advanced Equipment (SKLT), Laboratory of Flexible Electronics Technology, Tsinghua University, Beijing 100084, P. R. China.
Researchers developed a stretchable moisture-enabled electricity generator (s-MEG) using ionic gel for wearable electronics. This flexible device harvests energy from air humidity, even under strain, offering stable power for devices like wristbands.
Area of Science:
- Materials Science
- Energy Harvesting
- Wearable Electronics
Background:
- Direct energy harvesting from moist air via moisture-enabled electricity generators (MEGs) is crucial for wearable electronics.
- Rigid MEG materials face limitations due to spatial distortion during physical activity, hindering practical applications.
Purpose of the Study:
- To develop an intrinsically stretchable moisture-enabled electricity generator (s-MEG) with enhanced conformability for human use.
- To overcome the limitations of rigid MEG materials in wearable applications.
Main Methods:
- Fabrication of a stretchable functional ionic gel (SIG) with a double-network structure and reversible cross-linking.
- Integration of SIG with fabric electrodes to create the s-MEG.
- Testing of s-MEG performance under various strain conditions and cyclic deformations.
Main Results:
- The SIG-based s-MEG demonstrated stable electricity generation up to 150% strain, with ultrahigh tensile strain (∼600%).
- A 1 cm × 1 cm s-MEG produced ∼0.4 V and ∼5.7 μA from ambient humidity.
- The s-MEG maintained ∼90% performance after 5000 bending cycles, showing excellent stability and adhesion.
Conclusions:
- The developed s-MEG offers a promising solution for continuous energy harvesting in wearable electronics.
- The stretchable and conformable nature of the s-MEG enhances user comfort during physical activities.
- Integrated devices like moisture-powered wristbands and sheaths demonstrate the potential for practical energy generation in daily life.
