Piezoelectric materials are highly desirable for wearable electronics and energy harvesting. Piezoelectric PVDF/ZnO composite nanofibers are particularly desirable for their nontoxicity, breathability, and flexibility. Here, we investigated three methods of fabricating PVDF and ZnO composite nanofibers aimed at optimum piezoelectric responses. It was found, (1) adding ZnO nanorod as fillers within the PVDF nanofiber did not improve piezoelectric response due to the fact that the process made the material more dielectric; (2) ZnO nanorods on the PVDF surface increased the power output due to the combined effects of piezoelectricity of ZnO nanorods as well as the triboelectric response of the increased surface roughness; (3) electrospraying pre-synthesized ZnO nanorods on PVDF nanofibers resulted in the highest piezoelectric response due to the combined effect of the greater piezoelectricity of aligned ZnO nanorods and PVDF nanofibers, and larger triboelectric response from increased surface roughness.

对于可穿戴电子设备和能量收集，压电材料是非常理想的。压电PVDF / ZnO复合纳米纤维因其无毒，透气和柔韧性特别理想。在这里，我们研究了针对最佳压电响应的三种制造PVDF和ZnO复合纳米纤维的方法。发现：（1）由于该工艺使材料具有更高的介电常数，因此在PVDF纳米纤维内添加ZnO纳米棒作为填充剂并不能改善压电响应。（2）由于ZnO纳米棒的压电性和增加的表面粗糙度的摩擦电响应的共同作用，PVDF表面上的ZnO纳米棒增加了功率输出；