Significant triboelectric enhancement using interfacial piezoelectric ZnO nanosheet layer
Significant triboelectric enhancement using interfacial piezoelectric ZnO nanosheet layer
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DOI：
10.1016/j.nanoen.2017.08.053
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发表时间：
2017-10
期刊：
影响因子：
17.6
通讯作者：
A. A. Narasimulu-A.;P. Zhao;N. Soin;K. Prashanthi;P. Ding;Jinkai Chen;S. Dong;Li Chen;E. Zhou;C. Montemagno;Jikui Luo
中科院分区：
文献类型：
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作者：
A. A. Narasimulu-A.;P. Zhao;N. Soin;K. Prashanthi;P. Ding;Jinkai Chen;S. Dong;Li Chen;E. Zhou;C. Montemagno;Jikui Luo
利用界面压电ZnO纳米片层，一个显着的增强功率密度的摩擦电纳米发电机（TENG）的基础上的聚偏氟乙烯（PVDF）和聚酰胺-6（PA 6）的相转化膜的报告。在80 N的施加力下，结合电化学沉积的ZnO纳米片的TENG装置产生约625 V的输出电压和约40 mA m-2的电流密度（对应的电荷密度为100.6 μC m−2）;明显高于原始TENG器件的~ 310 V和~ 10 mA m−2（对应77.45 μC m−2的电荷密度）。与原始含氟聚合物膜（-50 pm V-1）相比，界面压电ZnO层提供的表面电荷密度的增强也反映在高压电系数d33（-74 pm V-1）中。对于将界面ZnO层的摩擦负膜，压电力显微镜测量进一步显示增强的域的大小，这可以归因于界面的偶极-偶极相互作用与PVDF的铁电极化，这促进了与ZnO的极轴的对齐。在压缩应力下，在ZnO纳米片中由此产生的压电电势提供电荷注入到ZnSnO 3-PVDF膜的表面上，提高了电荷密度，这又将功率密度从0.11显著提高到~ 1.8 W/m2。因此，使用一个简单的电化学沉积和相转化技术制造的TENG设备显示出增强的输出功率，而不需要高电场极化或外部电荷注入过程中依赖于摩擦电和压电效应的耦合。
Utilising an interfacial piezoelectric ZnO nanosheet layer, a significant enhancement in the power density is reported for the triboelectric nanogenerators (TENG) based on phase inversion membranes of polyvinylidene fluoride (PVDF) and polyamide-6 (PA6). At an applied force of 80 N, the TENG device incorporating electrochemically deposited ZnO nanosheets produces an output voltage of ~ 625 V and a current density of ~ 40 mA m−2(corresponding a charge density of 100.6 μC m−2), respectively; significantly higher than ~ 310 V and ~ 10 mA m−2(corresponding a charge density of 77.45 μC m−2) for the pristine TENG device. The enhancement in the surface charge density provided by the interfacial piezoelectric ZnO layer is also reflected in the high piezoelectric coefficient d33(−74 pm V−1) as compared to the pristine fluoropolymer membranes (−50 pm V−1). For tribo-negative membranes incorporating the interfacial ZnO layer, piezoelectric force microscopy measurements further show enhanced domain size which can be attributed to the interfacial dipole-dipole interaction with the ferroelectric polarisation of PVDF, which promotes the alignment with the polar axis of ZnO. Under compressive stress, the piezoelectric potential thus produced in the ZnO nanosheets provides charge injection on to the surface of ZnSnO3-PVDF membrane, improving the charge density, which in-turn significantly enhances the power density from 0.11 to ~ 1.8 W/m2. The TENG devices thus fabricated using a facile electrochemical deposition and phase inversion technique show enhanced output power without the need for high electric field poling or external charge injection process by relying on the coupling of triboelectric and piezoelectric effects.