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Published on: August 17, 2017
Significantly Enhanced High-Temperature Energy Storage Performance of Polyetherimide via Deep Trap Construction and
Zhichao Hu1, Hua Wang2, Hongcheng Yang3
1State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China.
Small (Weinheim an Der Bergstrasse, Germany)
|June 23, 2026
Summary
This study introduces zirconium dioxide quantum dots (ZrO2 QDs) into polyetherimide (PEI) to create advanced high-temperature energy storage dielectrics. The composite exhibits superior performance, overcoming limitations of leakage current and breakdown strength.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Polymer dielectrics are crucial for energy storage.
- Inorganic fillers enhance performance but face high-temperature limitations.
- Leakage current and breakdown strength hinder high-temperature applications.
Purpose of the Study:
- To develop high-temperature polymer/inorganic filler composite dielectrics.
- To improve energy storage performance by addressing leakage current and breakdown strength.
- To propose a synergistic mechanism for enhanced dielectric properties.
Main Methods:
- Hydrothermal synthesis of zirconium dioxide quantum dots (ZrO2 QDs).
- Incorporation of ZrO2 QDs into a polyetherimide (PEI) matrix.
- Investigating deep trap construction and carrier transport regulation.
Main Results:
- ZrO2 QDs act as carrier attraction and Coulomb scattering centers.
- Carrier transport is significantly suppressed at elevated temperatures.
- Achieved high discharge energy density (6.84 J cm⁻³ at 150°C) and efficiency (>90%).
Conclusions:
- Synergistic mechanism of deep trap construction and carrier transport regulation is effective.
- The composite demonstrates outstanding high-temperature energy storage capabilities.
- This approach offers a cost-effective method for designing high-temperature energy storage dielectrics.
