Facile method to enhance output performance of bacterial cellulose nanofiber based triboelectric nanogenerator by controlling micro-nano structure and dielectric constant
Facile method to enhance output performance of bacterial cellulose nanofiber based triboelectric nanogenerator by controlling micro-nano structure and dielectric constant
复制标题
通过控制微纳米结构和介电常数提高基于细菌纤维素纳米纤维的摩擦纳米发电机输出性能的简便方法
DOI：
10.1016/j.nanoen.2019.05.078
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发表时间：
2019-08-01
期刊：
影响因子：
17.6
通讯作者：
Yang, Ming-bo
中科院分区：
文献类型：
--
作者：
Shao, Yan;Feng, Chang-ping;Yang, Ming-bo
纳米摩擦发电机的发展可以将机械能转化为电能，为解决能源危机带来了新的前景。提高摩擦表面电荷密度和接触面积是提高TENG输出性能的两个关键因素。然而，提高电荷密度和操纵表面结构不能同时实现，并且复杂的制造过程可能限制TENG的应用。本文报道了一种基于细菌纤维素膜的环境友好型TENG。在改性的基础上，将高介电粒子BaTiO 3引入到BC薄膜中，在提高介电常数的同时构建微纳结构。在频率为2 Hz、峰值力为42 N的条件下，通过提高BC纳米纤维层的介电常数和表面结构，获得了开路电压为181 V、短路电流为21 μ A、转移电荷为76.6 nC的最佳薄膜（BaTiO 3含量为13.5 vol%）。此外，当与电阻串联时，实现了4.8W/m2的峰值功率密度。此外，TENG显示出良好的稳定性，并可以通过人体运动来获取机械能。本工作从材料的角度对TENG产生摩擦电的机理有了更好的认识，为从材料本身和表面改性两个方面提高TENG的输出性能提供了一条可行有效的途径。
The development of triboelectric nanogenerators (TENGs) can convert mechanical energy into electricity and bring new prospect for energy crisis. Improving tribo-charge surface density and contact area are two pivotal factors to enhance the output performance of TENG. However, improving the charge density and manipulating surface structure cannot be achieved simultaneously and complicated fabrication procedures may limit application of TENG. In this work, an environment friendly TENG based on bacteria cellulose film fabricated via facile vacuum filtration method was reported. In the presence of modifications, high dielectric particles BaTiO3 were introduced into BC nanofiber film to improve the dielectric constant as well as construct micro-nano structure at the same. With the combination of the enhancement of dielectric constant and surface structure of BC nanofibers layer, the open voltage of 181 V, the short current of 21 mu A, and transfer charge of 76.6 nC was achieved at a frequency of 2 Hz and a peak force of 42 N with the optimized film consisting of 13.5 vol% BaTiO3 particles. Additionally, a peak power density of 4.8 W/m(2) was achieved when connecting with the resistance in series. Moreover, the TENG showed excellent stability and can harvest the mechanical energy by human motion. This work gives a better understanding of the triboelectricity produced by the TENG from the point of materials and provides a feasible and effective way to enhance the output performance of TENG from the material itself as well as surface modification.