Enhanced dielectric and energy storage properties of BaTiO3 nanofiber/polyimide composites by controlling surface defects of BaTiO3 nanofibers

被引：63

作者：

Wan, Baoquan ^{[1
]}

Li, Haiyu ^{[1
]}

Xiao, Yunhui ^{[1
]}

Yue, Shuangshuang ^{[1
]}

Liu, Yunying ^{[2
]}

Zhang, Qiwei ^{[1
,3
]}

机构：

[1] Inner Mongolia Univ Sci & Technol, Inner Mongolia Key Lab Ferroelect Related New Ene, 7 Arding St, Kun Dist 014010, Baotou, Peoples R China

[2] Inner Mongolia Univ Sci & Technol, Sch Chem & Chem Engn, 7 Arding St, Kun Dist 014010, Baotou, Peoples R China

[3] Inner Mongolia Univ Sci & Technol, Key Lab Integrated Exploitat Bayan Obo Multimet R, Baotou 014010, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2020年 / 501卷

关键词：

BaTiO3; nanofibers; Surface defect; Polyimide; Energy storage; BARIUM-TITANATE; POLYMER NANOCOMPOSITES; MOLECULAR-ORIENTATION; POLYIMIDE NANOFIBERS; HIGH-PERMITTIVITY; HIGH-TEMPERATURE; DENSITY; PERFORMANCE; FILMS; INTERFACES;

D O I：

10.1016/j.apsusc.2019.144243

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

BaTiO3 (BT) nanofibers with different surface defects were prepared by electrospinning process through controlling the sintering atmospheres (Air, N-2 and H-2), and introduced into polyimide (PI) matrix to form composite films. The effects of different surface defects on dielectric and energy storage properties of PI composites were systematically investigated. The results showed that the fabricated composite films under a reducing (H-2) atmosphere exhibited excellent dielectric properties, compared with that under Air and O-2. The dielectric constant (epsilon(r)) of PI composite films with 20 wt% BT-fibers reached up to 17.6, while maintaining lower loss (tg delta = 0.006@ 100 kHz), which was about four times greater than that of pure PI (epsilon(r) = 4.1). When the content of BT-fiber was up to 15 wt%, the composite film exhibited a maximum energy storage density of U-e = 6.12 J/cm(3). These results provide an effective method to tune the dielectric and energy storage properties of ferroelectric/polymer composites.

引用

页数：9

共 60 条

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