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High Energy Storage of Polymer Blend at Elevated Temperature
Guanxiang Zhang1, Xiao Zhang1, Junyong Lu1
1National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan, 430033, China.
Macromolecular Rapid Communications
|May 28, 2025
Summary
Researchers developed a polymer blend (polyimide/polycarbonate) to improve high-temperature capacitive energy storage. The optimized blend shows excellent energy density and breakdown strength at 150°C, offering a scalable solution for advanced dielectric materials.
Area of Science:
- Materials Science
- Polymer Science
- Energy Storage
Background:
- Capacitive energy storage in polymer dielectrics is limited at high temperatures due to increased electrical conduction.
- Developing materials that maintain performance under thermal stress is crucial for advanced energy storage applications.
Purpose of the Study:
- To enhance the high-temperature capacitive energy storage of polymer dielectrics.
- To investigate the effect of blend composition on energy storage properties.
Main Methods:
- A blend strategy using polyimide (PI) and polycarbonate (PC) was employed.
- The energy storage performance of PI-PC blends with varying PI content was evaluated at elevated temperatures.
Main Results:
- The energy storage behavior was effectively tuned by adjusting PI concentration.
- An optimized 0.90PI-0.10PC blend achieved a breakdown strength of 709.4 MV m-1 and a discharged energy storage density of 7.9 J cm-3 at 150°C.
- This blend demonstrated superior performance compared to biaxially oriented polypropylene under similar conditions.
Conclusions:
- The PI-PC blend strategy offers a scalable approach for developing high-performance dielectric materials for high-temperature energy storage.
- The optimized blend exhibits significant potential for demanding energy storage applications.
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