Fluorinated metal-organic framework as bifunctional filler toward highly improving output performance of triboelectric nanogenerators. (April 2020)

• Record Type: Journal Article
• Authors: Guo, Yinben; Cao, Yule; Chen, Zixi; Li, Ran; Gong, Wei; Yang, Weifeng; Zhang, Qinghong; Wang, Hongzhi
• Is Part Of: Nano energy. Volume 70(2020)
• Publication Date: 2020-04
• Subjects: Fluorinated metal-organic framework -- Bifunctionality -- Charge-inducing capability -- Charge-trapping capability -- Triboelectric nanogenerator; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2020.104517
• Languages: English
• ISSNs: 2211-2855

Abstract

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. Graphical abstract: Image 1 Highlights: A Fluorinated MOF (F-MOF) was firstly incorporated to TENGs as bifunctional filler. Output power density of TENGs are increased by 11 times through introducing F-MOF. Charge inducing and trapping abilities of F-MOF fillers were discussed in details. F-MOF is proved as a universal filler to improve performance in six different polymer matrices.