Fluorinated metal-organic framework as bifunctional filler toward highly improving output performance of triboelectric nanogenerators

By Yinben Guo, Yule Cao, Zixi Chen, Ran Li, Wei Gong, Weifeng Yang, Qinghong Zhang, Hongzhi Wang. 2020

141 citations recorded by the source corpus.

Abstract 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.

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/2931067406cb506c7156db5128c682cd09dbdd12