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- Title
Three-layer structure design for enhancing the energy efficiency and breakdown strength of KTaNbO/polyimide nanocomposite films with high thermal stability.
- Authors
Chen, Gaoru; Lin, Jiaqi; Wang, Xuan; Yang, Wenlong; Li, Dongping; Ding, Weimin; Li, Haidong; Lei, Qingquan
- Abstract
Most polymers used as energy storage have a low operating temperature that limits the broad applications of capacitors. In this paper, PI was used as the polymer matrix, which endowed the KTN/PI composite film with an ultrahigh thermal decomposition temperature (~550 °C). In the designed three-layer-structured KTN/PI composite films, pure PI is employed as a middle layer while KTN nanoparticles are introduced in two outer layers. It is found that the three-layer-structured KTN/PI composite film could achieve a higher energy density (3.0 J/cm) than the single-layer-structured KTN/PI composite film (1.5 J/cm) by modulating distribution of its local electric field. The three-layer structure has been proved to be quite effective in enhancing the composite films' breakdown strength and increasing their energy density and discharge efficiency.
- Subjects
ENERGY consumption; POLYIMIDE films; NANOCOMPOSITE materials; THERMAL stability; ELECTRIC fields; POLYCARBONATES
- Publication
Journal of Materials Science: Materials in Electronics, 2017, Vol 28, Issue 18, p13861
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-017-7233-7