DataVXAdvanced Engineering MaterialsPaper
journal article·2019-12

Simultaneously Enhanced Permittivity and Electric Breakdown Strength of Polyacrylonitrile Composites by Introducing Ultralow Content BaSrTiO3 Nanofibers

Pengpeng Xu, Suibin Luo, Junyi Yu, Liqiang Cao, Shuhui Yu, Rong Sun, Ching-Ping Wong

Advanced Engineering Materials· Volume 21· Issue 12
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Source abstract

Abstract

Introducing nanoparticles in a polymer matrix to simultaneously enhance permittivity and electric breakdown strength is a challenge for the polymer‐based dielectric films to obtain improved energy‐storage density and efficiency. Herein, it is demonstrated that both of the aforementioned properties are enhanced by using an ultralow content of BaSrTiO3 nanofibers (BST NFs) with high aspect ratios (9–18) in the polyacrylonitrile (PAN) matrix. As the filler loading is 0.1–0.9 wt%, the permittivities of the composites are increased from 6.3 of the pure PAN to 6.93–7.92 at 1 kHz. The maximum electrical breakdown strength achieved at 0.3 wt% is 3865 kV cm−1, which is much higher than that of the pure PAN of ≈2987 kV cm−1. Significantly enhanced discharged energy density of 8.25 J cm−3 at a high charge–discharge efficiency of 83% is achieved. The electrical breakdown mechanism at ultralow filler content is investigated based on the simulation of space charges distribution.
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Research context

PolymersNanomaterialsComposites

OpenAlex topics: Dielectric materials and actuators · High voltage insulation and dielectric phenomena · Advanced Sensor and Energy Harvesting Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shenzhen Institute of Advanced Electronic Materials Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China

Department of Nano Science and Technology Institute University of Science and Technology of China Suzhou 215123 China

System Packaging and Integration Research Center Institute of Microelectronics of Chinese Academy of Sciences Beijing 100029 China

School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA

Funding

Science, Technology and Innovation Commission of Shenzhen Municipality · Shenzhen Institutes of Advanced Technology Innovation Program for Excellent Young Researchers · National Natural Science Foundation of China

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