Abstract
Hierarchically porous piezoelectric polymer nanofibers are prepared through precise control over the thermodynamics and kinetics of liquid–liquid phase separation of nonsolvent (water) in poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) solution. Hierarchy is achieved by fabricating fibers with pores only on the surface of the fiber, or pores only inside the fiber with a closed surface, or pores that are homogeneously distributed in both the volume and surface of the nanofiber. For the fabrication of hierarchically porous nanofibers, guidelines are formulated. A detailed experimental and simulation study of the influence of different porosities on the electrical output of piezoelectric nanogenerators is presented. It is shown that bulk porosity significantly increases the power output of the comprising nanogenerator, whereas surface porosity deteriorates electrical performance. Finite element method simulations attribute the better performance to increased volumetric strain in bulk porous nanofibers.
| Original language | English |
|---|---|
| Article number | 2000517 |
| Journal | Advanced Science |
| Volume | 7 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 1 Jul 2020 |
Funding
M.M.A. would like to thank Australian Endeavour Fellowship Program, Deakin University, and the Alexander von Humboldt Foundation for their financial support. M.N. acknowledge the support by the Australian Research Council World Class Future Fibre Industry Transformation Research Hub (IH140100018) and Australian Research Council Training Centre for Light Weight Automotive Structures (ATLAS). This work was performed in part at the Deakin node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano and micro‐fabrication facilities for Australia's researchers. K.A., S.A., and M.H.A. acknowledge the Alexander von Humboldt Foundation for the funding provided in the framework of the Sofja Kovalevskaja Award, endowed by the Federal Ministry of Education and Research, Germany and the Max‐Planck Institute for Polymer Research for technical support.
Keywords
- finite element simulations
- nanogenerators
- phase diagrams
- piezoelectric nanogenerators
- porous nanofibers
ASJC Scopus subject areas
- Medicine (miscellaneous)
- General Chemical Engineering
- Biochemistry, Genetics and Molecular Biology (miscellaneous)
- General Materials Science
- General Engineering
- General Physics and Astronomy