Recent development of high energy density polymers for dielectric capacitors

Yong Wang, Xin Zhou, Qin Chen, Baojin Chu, Qiming Zhang

    Research output: Contribution to journalArticle

    185 Scopus citations

    Abstract

    High energy density dielectric materials are desirable for capacitors and other energy storage systems. Two approaches were developed to achieve high electric energy density: explore high dielectric constant (K) materials and improve high operation electric field. Relaxor ferroelectric polyvinylidene fluoride (PVDF) based copolymers P(VDF-HFP), P(VDF-CTFE) and terpolymer P(VDF-TrFE-CFE) have been proven to possess high electric energy density. An energy density of over 25 J/cm3 has been achieved in PVDF-based polymers, which represents the state of art in high energy density polymers. Aromatic polyurea thin films were developed through vapor phase deposition, exhibiting relatively high dielectric constant, low loss, high breakdown field (>800 MV/m) and consequently high energy density (>12 J/cm3). Its thermal stability up to 200°C and high charge-discharge efficiency (>90%) make it attractive for high temperature capacitors. Investigation through SEM, AFM and other experiments indicated unbalanced aromatic polyurea could exhibit apparent high-K (∼15) due to the non-uniformity of film thickness and surface morphology. This article reviews the recent development of these high performance polymers.

    Original languageEnglish (US)
    Article number5539672
    Pages (from-to)1036-1042
    Number of pages7
    JournalIEEE Transactions on Dielectrics and Electrical Insulation
    Volume17
    Issue number4
    DOIs
    StatePublished - Aug 1 2010

    All Science Journal Classification (ASJC) codes

    • Electrical and Electronic Engineering

    Fingerprint Dive into the research topics of 'Recent development of high energy density polymers for dielectric capacitors'. Together they form a unique fingerprint.

  • Cite this