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High Energy Density and Discharging Efficiency Achieved in Chlorinated Polyethylene Films for High Energy‐Storage Applications
Author(s) -
Zhao Yifei,
Li Qian,
Zhang Xiao,
Li Huayi,
Lu Junyong,
Zhang Zhicheng
Publication year - 2018
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201700621
Subject(s) - materials science , dielectric , capacitor , permittivity , polymer , polyethylene , energy storage , composite material , glass transition , polymer chemistry , optoelectronics , electrical engineering , voltage , power (physics) , physics , engineering , quantum mechanics
Polymeric dielectric materials with high energy density ( U e ), elevated breakdown strength ( E b ), and high discharging efficiency (η) are in demand for high‐pulse metalized film capacitor application. In the present work, a randomly chlorinated polyethylene (CPE) with 71 wt% Cl moiety is fabricated in thin film (8–10 µm). Thanks to the high Cl content, CPE exhibits a rather high glass transition temperature (≈110 °C) and a Young's modulus of 2.6 GPa, which may address its high E b . The random dispersion of Cl atoms onto the polymer chain is responsible for the well‐maintained medium permittivity (3–4) and low loss at elevated temperature. Both factors result in the rather high U e (about 12 J cm −3 ) and high η (about 83%) under an electric field of 700 MV m −1 . Its higher energy‐storage capability and operating temperature make CPE a promising polymeric dielectric for high‐pulse metalized film capacitor applications.