Hierarchically Structured Porous Piezoelectric Polymer Nanofibers for Energy Harvesting

Mohammad Mahdi Abolhasani, Minoo Naebe, Morteza Hassanpour Amiri, Kamyar Shirvanimoghaddam, Saleem Anwar, Jasper J. Michels, Kamal Asadi

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54 Citations (SciVal)


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 languageEnglish
Article number2000517
JournalAdvanced Science
Issue number13
Publication statusPublished - 1 Jul 2020


  • 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


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