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- Title
Dielectric and energy storage properties of nanocomposites with core–shell paraffin-engineered BaTiO3 in polyimides.
- Authors
Pu, Linyu; Tang, Jingyuan; Gu, Xiaochun; Jin, Tingting; Zeng, Benlan; Liu, Jingsong; Huang, Xu
- Abstract
In this work, PI was chosen as polymer matrix, PI composite films embedded with BaTiO3 were prepared by in-situ polymerization. BaTiO3 nanofillers were modified with paraffin to form a core–shell structure in order to improve the dispersion and compatibility with PI matrix. The permittivity of paraffin@BT/PI composite films with 40 wt% filler loading increase to 8.0 (1 kHz), which is about 2.4 times higher than that of pristine PI. The composites show stable capacitance in the range of 80 to180 °C. The energy storage density of composites with 40 wt% filler loading is as high as 3.31 J cm−3 under 180 MV m−1, which is 2.4 times higher than that of pristine PI (0.97 J cm−3 at 180 MV m−1). However, the charge–discharge efficiency is 29.03%, and the discharge energy density is only 0.96 J cm−3 at 180 MV m−1. To weigh the pros and cons, the composites with 30 wt% filler loading exhibit a better energy storage property, with a η of 70.45% (180 MV m−1) and discharge energy density of 1.03 J cm−3 at 180 MV m−1.
- Subjects
POLYIMIDES; ENERGY density; DIELECTRICS; NANOCOMPOSITE materials; PARAFFIN wax; PERMITTIVITY
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 5, p5886
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-05309-7