Scalable all polymer dielectrics with self-assembled nanoscale multiboundary exhibiting superior high temperature capacitive performance

纳米尺度 材料科学 可扩展性 电介质 电容感应 纳米技术 聚合物 光电子学 计算机科学 复合材料 数据库 操作系统
作者
Qiyan Zhang,Q W Xie,Tao Wang,Shuangwu Huang,Qiming Zhang
出处
期刊:Nature Communications [Nature Portfolio]
卷期号:15 (1) 被引量:7
标识
DOI:10.1038/s41467-024-53674-8
摘要

Polymers are key dielectric materials for energy storage capacitors in advanced electronics and electric power systems due to their high breakdown strengths, low loss, great reliability, lightweight, and low cost. However, their electric and dielectric performance deteriorates at elevated temperatures, making them unable to meet the rising demand for harsh-environment electronics such as electric vehicles, renewable energy, and electrified transportation. Here, we present an all-polymer nanostructured dielectric material that achieves a discharged energy density of 7.1 J/cm³ with a charge-discharge efficiency of 90% at 150°C, outperforming the existing dielectric polymers and representing more than a twofold improvement in discharged energy density compared with polyetherimide. The self-assembled nano-scale multiboundaries effectively impede the charge injection and excitation, leading to more than one order of magnitude lower leakage current density than the pristine polymer matrix PEI at high electric fields and elevated temperature. In addition, the film processing is simple, straightforward, and low cost, thus this all-polymer nanostructured dielectric material strategy is suitable for the mass production of dielectric polymer films for high-temperature capacitive energy storage. The electric and dielectric performance of polymers usually deteriorates at elevated temperatures limiting their applicability for harsh-environment electronics. Here, the authors report an all-polymer nanostructured dielectric material with high temperature capacitive energy storage performance.
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