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

Qiyan Zhang; Qiaohui Xie; Tao Wang; Shuangwu Huang; Qiming Zhang

doi:10.1038/s41467-024-53674-8

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

Nat Commun. 2024 Oct 29;15(1):9351. doi: 10.1038/s41467-024-53674-8.

Authors

Qiyan Zhang¹, Qiaohui Xie², Tao Wang³, Shuangwu Huang⁴, Qiming Zhang⁵

Affiliations

¹ State Key Laboratory of Radio Frequency Heterogeneous Integration, College of Electronics and Information Engineering, Institute of Microelectronics (IME), Shenzhen University, Shenzhen, China. [email protected].
² State Key Laboratory of Radio Frequency Heterogeneous Integration, College of Electronics and Information Engineering, Institute of Microelectronics (IME), Shenzhen University, Shenzhen, China.
³ College of Materials Science and Engineering, Shenzhen University, Shenzhen, China.
⁴ State Key Laboratory of Radio Frequency Heterogeneous Integration, College of Electronics and Information Engineering, Institute of Microelectronics (IME), Shenzhen University, Shenzhen, China. [email protected].
⁵ School of Electrical Engineering and Computer Science, Materials Research Institute, The Pennsylvania State University, University Park, PA, USA. [email protected].

Abstract

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.