Enhanced energy harvesting based on surface morphology engineering of P(VDF-TrFE) film
Enhanced energy harvesting based on surface morphology engineering of P(VDF-TrFE) film
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DOI：
10.1016/j.nanoen.2015.07.006
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发表时间：
2015-09-01
期刊：
影响因子：
17.6
通讯作者：
Kim, Jong Min
中科院分区：
文献类型：
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作者：
Cho, Yuljae;Park, Jong Bae;Kim, Jong Min
聚偏二氟乙烯（PVDF）作为能量收集材料具有巨大的潜力，因为它不仅表现出由铁电效应引起的出色的压电和静电特性，而且与无机材料相比，对重复机械应力具有非常稳健的稳定性。我们报告了增强性能的聚（偏二氟乙烯-共-三氟乙烯）（P（VDF-TrFE））为基础的能源发电机具有更广泛的选择灵活的基板，通过表面形态工程，使用溶剂退火方法的关键技术，在室温下简单和成本效益的制造。它清楚地表明，溶剂退火的P（VDF-TrFE）薄膜在室温下结晶，表面形貌从粗糙的表面变成一个光滑和平坦的表面随着退火时间的增加。这种表面形态工程导致能量发生器的输出电压和电流提高8倍，因为电偶极子排列良好。我们还展示了一种高度透明和灵活的能量发生器，采用石墨烯电极与溶剂退火的P（VDF-TrFE）膜，可以有效地收集各种机械能源。(C)2015爱思唯尔有限公司版权所有。
Polyvinylidene fluoride (PVDF) has great potential for its use as an energy harvesting material as it exhibits not only outstanding piezoelectric and electrostatic characteristics resulting from ferroelectric effects, but also remarkably robust stability against repeated mechanical stress compared to inorganic materials. We report enhanced performances of poly(vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)) based energy generators with wider range of selections of flexible substrates through a surface morphology engineering using solvent annealing method as the key technology for simple and cost-effective fabrication at room temperature. It is clearly revealed that a solvent annealed P(VDF-TrFE) film is crystallised at room temperature and that the surface morphology is changed from a rough surface into a smooth and flat surface with increasing annealing time. This surface morphology engineering results in 8 times enhanced output voltage and current of the energy generators because of well-aligned electrical dipoles. We also demonstrate a highly transparent and flexible energy generator by employing graphene electrodes with the solvent annealed P(VDF-TrFE) film, which can be effectively harvesting various mechanical energy sources. (C) 2015 Elsevier Ltd. All rights reserved.