Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 31, Issue 24, Pages 22028-22038Publisher
SPRINGER
DOI: 10.1007/s10854-020-04704-w
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Funding
- National Natural Science Foundation of China [51905149, 51875277, 51921003]
- Jiangsu Planned Projects for Postdoctoral Research Funds [2020Z015]
- Nantong Science and technology Bureau [JC2019003]
- Foundation strengthening plan technology fund [2019-JCJQ-JJ-337]
- State Key Laboratory of Mechanics and Control of Mechanical Structures (Nanjing University of Aeronautics and astronautics) [MCMS-I-0519G02]
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The development of piezoelectric polymers with superior electromechanical performance is a demand in the areas of flexible sensors, actuators and tissue engineering, among others. In this work, we reported a novel sandwich-structured piezoelectric composites comprising of poly(vinylidene fluoride-hexafluoropropylene) [P(VDF-HFP)] and Prussian blue analogs Co-3[Co(CN)(6)](2) with excellent electromechanical activities. The large specific surface area, unique three-dimensional porous nanostructure and redox behavior of Co-3[Co(CN)(6)](2) appeared to significantly promote the interfacial coupling effect within P(VDF-HFP), resulting in enhanced electromechanical response. Moreover, the sandwich structure topological design would enlarge the interfacial coupling effect, strengthen the breakdown strength and consequently raise the electromechanical performance. For instance, a maximum piezoelectric coefficient d(33) of similar to 41 pC/N can be achieved in the sandwiched composites at a loading of 0.8 wt%, which is 1.78 times that of pure P(VDF-HFP). Furthermore, the sandwiched composites possess superior electromechanical coupling factor k(33) up to 0.215, while that of pure P(VDF-HFP) is only 0.134.
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