Open AccessHierarchically Structured Porous Piezoelectric Polymer Nanofibers for Energy Harvesting
Author(s) -
Abolhasani Mohammad Mahdi,
Naebe Minoo,
Hassanpour Amiri Morteza,
Shirvanimoghaddam Kamyar,
Anwar Saleem,
Michels Jasper J.,
Asadi Kamal
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202000517
Subject(s) - materials science , porosity , nanofiber , piezoelectricity , composite material , fabrication , electrospinning , polymer , fiber , surface energy , nanogenerator , chemical engineering , alternative medicine , pathology , engineering , medicine
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.