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High-performance flexible piezoelectric nanogenerators consisting of porous cellulose nanofibril (CNF)/poly(dimethylsiloxane) (PDMS) aerogel films
Nano Energy ( IF 16.8 ) Pub Date : 2016-06-21 00:00:32
Qifeng Zheng, Huilong Zhang, Hongyi Mi, Zhiyong Cai, Zhenqiang Ma, Shaoqin Gong

A novel, simple, cost-effective, and scalable technique was developed to fabricate high-performance flexible piezoelectric nanogenerators (NGs) using porous cellulose nanofibril (CNFs)/poly(dimethylsiloxane) (PDMS) aerogel film. The porous CNF/PDMS aerogel film was prepared by coating a layer of PDMS on the porous surface of a compressed CNF aerogel film produced via an environmentally friendly freeze-drying process. The porous CNF/PDMS aerogel film was then sandwiched between two thin PDMS films, followed by two aluminum foils, to form the flexible NGs. Under periodic external mechanical deformation by an oscillator, the resulting flexible porous CNF/PDMS aerogel film-based NGs exhibited very stable and high output piezoelectric signals; namely, an open-circuit voltage (V oc ) of 60.2V, a short-circuit current (I sc ) of 10.1μA, and a corresponding power density of 6.3mW/cm3. The electric power generated by these NGs was able to directly turn on 19 blue light-emitting diodes (LEDs) and charge a capacitor up to 3.7V. Furthermore, these NGs also demonstrated excellent stability and durability. Considering their excellent piezoelectric performance, ease of large-scale manufacturing, and environmental friendliness, this technology provides a promising solution for developing practical, flexible, and self-powered electronic devices.

中文翻译:

由多孔纤维素纳米原纤维(CNF)/聚二甲基硅氧烷(PDMS)气凝胶膜组成的高性能柔性压电纳米发生器

开发了一种新颖,简单,具有成本效益且可扩展的技术,以使用多孔纤维素纳米原纤维(CNF)/聚(二甲基硅氧烷)(PDMS)气凝胶膜来制造高性能的柔性压电纳米发电机(NG)。多孔CNF / PDMS气凝胶膜是通过在通过环保的冷冻干燥方法生产的压缩CNF气凝胶膜的多孔表面上涂覆PDMS层而制备的。然后将多孔CNF / PDMS气凝胶薄膜夹在两层PDMS薄膜之间,再夹在两层铝箔之间,以形成柔性NG。在由振荡器引起的周期性外部机械变形下,所得的基于柔性多孔CNF / PDMS气凝胶膜的NGs表现出非常稳定且高输出的压电信号。即开路电压(V oc)60.2V,短路电流(I sc)10.1μA,相应的功率密度6.3mW / cm 3。这些NG产生的电能能够直接打开19个蓝色发光二极管(LED)并为电容器充电至3.7V。此外,这些NG也表现出优异的稳定性和耐久性。考虑到其出色的压电性能,易于大规模生产以及环境友好的特点,该技术为开发实用,灵活且自供电的电子设备提供了有希望的解决方案。
更新日期:2016-06-21
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