材料科学
聚偏氟乙烯
结晶度
压电
介孔材料
薄膜
复合材料
多孔性
差示扫描量热法
化学工程
聚合物
纳米技术
有机化学
化学
催化作用
物理
工程类
热力学
作者
Dajing Chen,Tushar Sharma,John X. J. Zhang
标识
DOI:10.1016/j.sna.2014.05.027
摘要
We demonstrate that nanostructured thin films play a significant role in compact energy harvesting polyvinylidene fluoride (PVDF) nanogenerators. In this work, we introduced a surface control technique for preparing mesoporous PVDF thin films toward high piezoelectric output. We demonstrated that the morphology of the film could be controlled by varying the solvent evaporation rate. The material crystallinity was experimentally confirmed by X-ray diffraction (XRD) and differential scanning calorimeter (DSC) measurement. The multilayer PVDF structure with porous surface significantly increased the compressibility and charge collecting area which contributes to the significant output enhancement. The piezoelectric output increased 100% with the modified mesoporous layer. The charging capacity increased 107% compared with the same thickness solid PVDF film.
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