Relaxor ferroelectric polymer exhibits ultrahigh electromechanical coupling at low electric field
- Pennsylvania State Univ., University Park, PA (United States)
- North Carolina State Univ., Raleigh, NC (United States)
- Shanghai Jiao Tong University (China)
- PolyK Technologies, LLC, State College, PA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II
- Case Western Reserve Univ., Cleveland, OH (United States)
- Arkema-Piezotech (France)
Electromechanical (EM) coupling—the conversion of energy between electric and mechanical forms—in ferroelectrics has been used for a broad range of applications. Ferroelectric polymers have weak EM coupling that severely limits their usefulness for applications. Here, we introduced a small amount of fluorinated alkyne (FA) monomers (<2 mol %) in relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (PVDF-TrFE-CFE) terpolymer that markedly enhances the polarization change with strong EM coupling while suppressing other polarization changes that do not contribute to it. Under a low–dc bias field of 40 megavolts per meter, the relaxor tetrapolymer has an EM coupling factor (k33) of 88% and a piezoelectric coefficient (d33) >1000 picometers per volt. These values make this solution-processed polymer competitive with ceramic oxide piezoelectrics, with the potential for use in distinct applications.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- SC0012704; AC05-00OR22725
- OSTI ID:
- 1889150
- Report Number(s):
- BNL-223446-2022-JAAM
- Journal Information:
- Science, Journal Name: Science Journal Issue: 6587 Vol. 375; ISSN 0036-8075
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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