Fluorinated metal-organic framework as bifunctional filler toward highly improving output performance of triboelectric nanogenerators
Fluorinated metal-organic framework as bifunctional filler toward highly improving output performance of triboelectric nanogenerators
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氟化金属有机骨架作为双功能填料可大幅提高摩擦纳米发电机的输出性能
DOI：
10.1016/j.nanoen.2020.104517
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发表时间：
2020-04-01
期刊：
影响因子：
17.6
通讯作者：
Wang, Hongzhi
中科院分区：
文献类型：
--
作者：
Guo, Yinben;Cao, Yule;Wang, Hongzhi
具有高发电性能的摩擦纳米发电机（TENG）作为一种新兴的绿色能源技术一直备受关注。为了追求摩擦电材料更高的摩擦电性并提高TENG的输出性能，各种具有高电荷捕获能力的纳米/微米材料被引入TENG中作为填料，但填料的单一功能仍然存在挑战。在此，将一种非常规填料——具有双功能（同时具有高电荷诱导和电荷捕获能力）的氟化金属有机骨架（F-MOF）引入到聚二甲基硅氧烷（PDMS）基质中，以显着提高复合膜的负摩擦电性、电荷捕获性能和疏水性。利用这种优化的复合薄膜和铝箔作为摩擦电对，组装了 TENG，输出功率密度提高了 11 倍。通过详细的实验和理论分析，讨论了F-MOF在复合膜中的工作机理。此外，当其他聚合物基体（聚偏二氟乙烯）、（PVDF）硅橡胶（Si-rubber）、聚四氟乙烯（PTFE）、聚氨酯（PU）和聚丙烯腈（PAN））用作PDMS的替代品时，F-MOF填料也能很好地发挥作用，证明F-MOF可以作为提高TENG输出性能的通用填料。引入MOF作为填料的成功尝试为提高TENG的输出性能和扩大TENG的材料库铺平了一条有希望的道路。
Triboelectric nanogenerators (TENGs) with high power-generating performance always attract much attention as one emerging green energy technology. To pursue higher triboelectricity of triboelectric materials and improve output performance of TENGs, various nano/micro-materials with high charge-trapping capabilities were introduced into TENGs as fillers, but challenges remained in single functionality of the fillers. Herein, an unconventional filler, fluorinated metal-organic framework (F-MOF), with bifunctionality (both high charge-inducing and charge-trapping capabilities) was incorporated into polydimethylsiloxane (PDMS) matrix to highly improve negative triboelectricity, charge-trapping property and hydrophobicity of composite films. With such an optimized composite film and an Al foil as the triboelectric pair, TENGs were assembled and showed an 11-time increase in the output power density. The working mechanism of the F-MOF in the composite film was discussed through elaborate experimental and theoretical analysis. Besides, F-MOF fillers also worked well when other polymer matrices (Poly(vinylidene fluoride), (PVDF) silicone rubber (Si- rubber), Polytetrafluoroethylene (PTFE), Polyurethane (PU) and Polyacrylonitrile (PAN))were used as the substitutes for PDMS, proving that the F-MOF can be used as the universal filler for improving output performance of TENGs. The successful attempt to introduce MOF as a filler paved a promising way to enhance the output performance of TENGs and enlarge the materials pool to choose for TENGs.