| Autor: |
Jian Wang, Yunchuan Xie, Chao Chen, Biyun Peng, Ben Zhang, Zhicheng Zhang |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
IET Nanodielectrics, Vol 4, Iss 4, Pp 171-178 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2514-3255 |
| DOI: |
10.1049/nde2.12013 |
| Popis: |
Abstract Dielectric materials with high‐energy‐density and low‐energy‐loss have received lot of attention in terms of renewable energy storage and application. PVDF‐based polymer/ceramics composite dielectrics are considered as one of the most promising materials due to their high dielectric constant. However, the high remnant polarisation (Pr) of ferroelectric polymer matrix and ceramics fillers generates a lot of energy loss and residual heat during charge‐discharge cycles, which limits their practical applications. Compared with ferroelectrics, relaxor ferroelectric and antiferroelectric dielectrics may have high energy efficiency due to their lower Pr. Here, the relaxor ferroelectric matrix and antiferroelectric filler coated by the polydopamine layer were prepared by chemical grafting and solid‐state method, respectively. Afterwards, the P(VDF‐TrFE‐CTFE)‐g‐PMMA/PLZST nanocomposite was prepared via solution casting. Experimental results show that the energy loss of the optimised nanocomposites was significantly reduced, leading to an enhanced charge‐discharge efficiency (η) of 78% at 450 MV/m, which is 267% of the pure P(VDF‐TrFE‐CTFE) matrix and superior to those of most polymer/ferroelectric filler nanocomposites. It is encouraging that the breakdown strength and energy storage density of the P(VDF‐TrFE‐CTFE)‐g‐PMMA/PLZST nanocomposites with 6 wt% filler fractions reach the values of 458 MV/m and 10.3 J/cm3. This study establishes a simple and effective strategy for preparing capacitors with high energy efficiency. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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