High-temperature polymer-based nanocomposites for high energy storage performance with robust cycling stability

Chen, Yi-Fan1; Zheng, Yan-Tao1; Zhang, Feng-Yuan2; Liu, Zhi-Gang2; Zhang, Ling-Yu1; Yang, Lu1; Sun, Xin-Di1; Deng, Yuan3; Wang, Yao1,3

2023-10-01

10.1007/s12598-023-02312-1

RARE METALS   Impact Factor & Quartile

1001-0521

1867-7185

High-power capacitors are highly demanded in advanced electronics and power systems, where rising concerns on the operating temperatures have evoked the attention on developing highly reliable high-temperature dielectric polymers. Herein, polyetherimide (PEI) filled with highly insulating Al2O3 (AO) nanoparticles dielectric composite films have been fabricated aiming for high thermal stability and reliability operated under high cycling electric field and elevated temperature. At room temperature, incorporating a small fraction of 0.5 vol% AO nanoparticles gives rise to a highest discharged energy density (U-e) of 5.57 J.cm(-3) and efficiency (eta) of 90.9% at 650 MV.m(-1), and a robust cycling stability up to 10(7) cycles at 400 MV.m(-1). Due to the substantially reduced dielectric loss, 2.0 vol% AO/PEI nanocomposite film exhibits excellent high-temperature capacitive performances, delivering U-e similar to 7.33 J.cm(-3) with eta similar to 88.8% under 700 MV.m(-1), and cycling stability up to 10(6) cycles under 400 MV.m(-1) at 100 degrees C, and U-e similar to 5.57 J.cm(-3) with eta similar to 84.7% under 620 MV.m(-1) at 150 degrees C. Molecular dynamic simulations are performed to understand the microscopic mechanism via revealing the polymer relaxation process in the AO/PEI composite at elevated temperatures. Our results are therefore very encouraging for high-temperature high-power capacitor application.

Polymer-based nanocomposites Dielectric Energy storage Temperature stability

SCI

English

Others

This work was financially supported by the National Natural Science Foundation of China (Nos. 92066203 and 51872009) and the Fundamental Research Funds for the Central Universities.["92066203","51872009"]

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:001076963700003

NONFERROUS METALS SOC CHINA

MATERIALS SCIENCE

Web of Science

1.Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Beihang Univ, Hangzhou Innovat Inst, Hangzhou 310052, Peoples R China

Chen, Yi-Fan,Zheng, Yan-Tao,Zhang, Feng-Yuan,et al. High-temperature polymer-based nanocomposites for high energy storage performance with robust cycling stability[J]. RARE METALS,2023.

Chen, Yi-Fan.,Zheng, Yan-Tao.,Zhang, Feng-Yuan.,Liu, Zhi-Gang.,Zhang, Ling-Yu.,...&Wang, Yao.(2023).High-temperature polymer-based nanocomposites for high energy storage performance with robust cycling stability.RARE METALS.

Chen, Yi-Fan,et al."High-temperature polymer-based nanocomposites for high energy storage performance with robust cycling stability".RARE METALS (2023).