Hierarchically Structured Porous Piezoelectric Polymer Nanofibers for Energy Harvesting.,Advanced Science

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Hierarchically Structured Porous Piezoelectric Polymer Nanofibers for Energy Harvesting.
Advanced Science ( IF 14.3 ) Pub Date : 2020-06-03 , DOI: 10.1002/advs.202000517
Mohammad Mahdi Abolhasani _{1,

2} , Minoo Naebe ₃ , Morteza Hassanpour Amiri ₁ , Kamyar Shirvanimoghaddam ₃ , Saleem Anwar _{1,

4} , Jasper J Michels ₁ , Kamal Asadi ₁

Affiliation

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.

中文翻译：

用于能量收集的分层结构多孔压电聚合物纳米纤维。

通过精确控制聚偏二氟乙烯-三氟乙烯（P(VDF-TrFE)）溶液中非溶剂（水）的液-液相分离的热力学和动力学，制备了多级多孔压电聚合物纳米纤维。通过制造仅在纤维表面上具有孔的纤维、或仅在纤维内部具有封闭表面的孔、或均匀分布在纳米纤维的体积和表面中的孔来实现层次结构。对于分层多孔纳米纤维的制造，制定了指导方针。提出了不同孔隙率对压电纳米发电机电输出影响的详细实验和模拟研究。结果表明，体孔隙率显着增加了所包含的纳米发电机的功率输出，而表面孔隙率恶化了电性能。有限元方法模拟将更好的性能归因于散装多孔纳米纤维增加的体积应变。

更新日期：2020-07-08

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