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    李国锋

    • 教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:电气工程学院
    • 学科:电工理论与新技术
    • 办公地点:A3区32号楼静电与特种电源研究所201室
    • 联系方式:+86-411-84706489(O)
    • 电子邮箱:guofenli@dlut.edu.cn

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    Excellent energy storage performance and thermal property of polymer-based composite induced by multifunctional one-dimensional nanofibers oriented in-plane direction

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    论文类型:期刊论文

    第一作者:Zhang, Yue

    通讯作者:Zhang, TD; Chi, QG; Dang, ZM (reprint author), Harbin Univ Sci & Technol, Minist Educ, Key Lab Engn Dielect & Its Applicat, Harbin 150080, Heilongjiang, Peoples R China.

    合写作者:Wang, Xuan,Dang, Zhimin,Lei, Qingquan,Zhang, Changhai,Feng, Yu,Zhang, Tiandong,Chen, Qingguo,Chi, Qingguo,Liu, Lizhu,Li, Guofeng,Cui, Yang

    发表时间:2019-02-01

    发表刊物:NANO ENERGY

    收录刊物:SCIE、Scopus

    卷号:56

    页面范围:138-150

    ISSN号:2211-2855

    关键字:Interface modification; Core-shell structure; Breakdown strength; Energy storage; Thermal property

    摘要:As advanced dielectric materials for the applications in electronics and electrical power systems with the ever-increasing requirements, the polymer-based dielectric nano-composites are brilliantly emerging. However, there are long standing challenges of the unsatisfactory electric breakdown strength and the heat accumulation induced by dielectric loss of composite. In this study, we propose an artificial nano-composite with excellent comprehensive performance by controlling the orientation of one-dimensional (1D) 0.5Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3 nanofibers (BZCT NFs) and adjusting the interaction between BZCT NFs and poly(vinylidene fluoride) (PVDF) matrix via SiO2 buffer layer. Remarkably, PVDF nano-composite with only 3 vol% aligned BZCT NFs coated by SiO2 (BZCT@SiO2 NFs, 3 vol% Aligned BZCT@SiO2-PVDF) possesses an impressive energy storage performance, including the superior Weibull characteristic breakdown strength (E-b) of similar to 576 kV/mm and the ultrahigh discharged energy density (U-e) of similar to 18.9 J/cm(3). Meanwhile, the temperature distribution in this typical composite is more homogeneous according to the test and simulation results. This demonstrated work not only opens a new door to preparing an excellent performance of polymer-based dielectric nano-composites, but also points out a route to the industrialization of energy storage dielectrics.