Polymer Dielectrics with Simultaneous Ultrahigh Energy Density and Low Loss

Polymer dielectrics are highly desirable in capacitor applications due to their low cost, high breakdown strength, and unique self-healing capability. However, existing polymer dielectrics suffer from either a low energy density or a high dielectric loss, thereby hindering the development of compact, efficient, and reliable power electronics. Here, a novel type of polymer dielectrics simultaneously exhibiting an extraordinarily high recoverable energy density of 35 J cm(-3) and a low dielectric loss is reported. It is synthesized by grafting zwitterions onto the short side chains of a poly(4-methyl-1-pentene) (PMP)-based copolymer, which increases its dielectric constant from approximate to 2.2 to approximate to 5.2 and significantly enhances its breakdown strength from approximate to 700 MV m(-1) to approximate to 1300 MV m(-1) while maintaining its low dielectric loss of 90%. Based on a combination of the phase-field method description of mesoscale structures, Maxwell equations, and theoretical analysis, it is demonstrated that the outstanding combination of high energy density and low dielectric loss of zwitterions-grafted copolymers is attributed to the covalent-bonding restricted ion polarization and the strong charge trapping by the zwitterions. This work represents a new strategy in polymer dielectrics for achieving simultaneous high energy density and low dielectric loss.



Work Title Polymer Dielectrics with Simultaneous Ultrahigh Energy Density and Low Loss
Open Access
  1. Min Zhang
  2. Bo Li
  3. Jian-Jun Wang
  4. Hou-Bing Huang
  5. Lin Zhang
  6. Long-Qing Chen
  1. Dielectric loss
  2. Energy density
  3. Polymer dielectrics
  4. Zwitterion functionalization
License In Copyright (Rights Reserved)
Work Type Article
  1. Advanced Materials
Publication Date 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1002/adma.202008198
Deposited August 10, 2022




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Work History

Version 1

  • Created
  • Updated
  • Added Creator Sandra Elder
  • Added Polymer Dielectrics with Simultaneous Ultrahigh Energy Density and Low Loss.pdf
  • Updated License Show Changes
    • https://rightsstatements.org/page/InC/1.0/
  • Published
  • Updated Keyword, Publisher, Publisher Identifier (DOI), and 1 more Show Changes
    • Dielectric loss, Energy density, Polymer dielectrics, Zwitterion functionalization
    • Advanced Materials
    Publisher Identifier (DOI)
    • https://doi.org/10.1002/adma.202008198
    Publication Date
    • 2021-06
    • 2021
  • Deleted Creator Sandra Elder
  • Added Creator Min Zhang
  • Added Creator Bo Li
  • Added Creator Jian-Jun Wang
  • Added Creator Hou-Bing Huang
  • Added Creator Lin Zhang
  • Added Creator Long-Qing Chen