Preparation of Triboelectric Nanogenerators with CNT-Containing and Micro-structure PDMS Composite Films

doi:10.3901/JME.2021.15.177

Abstract

Abstract: Due to the complex and high-cost fabrication process of the dielectric layer surface microstructure of Triboelectric Nanogenerators, in this paper, a novel method is proposed to obtain the dielectric layer by applying microstructural carbon nanotubes (CNT)/polydimethylsiloxane (PDMS) elastomer membrane triboelectric nanogenerators. Carbon nanotubes are doped in polydimethylsiloxane to increase the dielectric constant, and the microstructure is rapidly formed on the surface of PDMS with sandpaper as template. The experiments are conducted to investigate the influence of the mesh of sandpaper template, CNT doping content, and the effect of load on the output performance of the triboelectric nanogenerators. In addition, we measure the output power and durability of the generator. The results demonstrate the following three aspects. First, the surface microstructure manufacturing method could increase the surface area of dielectric layer to improve the output of the generators. When the microstructure is generated with 800 mesh sandpaper, the output of the Triboelectric Nanogenerators reaches a maximum. Second, doping CNT can increase the capacitance of dielectric layer. The capacitance reaches a maximum of 24.2 pF with 1% CNT. Third, the Triboelectric Nanogenerators with a surface area of 6×10^-4m² could produce a maximum instantaneous power density of 1.23×10^-3 w/m³, and good durability after 1 000 working cycles is shown.

Key words: triboelectric nanogenerators, dielectric layer, sandpaper template, micro-structure, CNT

CLC Number:

TS852

XIAO Yuan, LIU Jinchao, Lü Xiaolai, LI Hongying, DAI Yang. Preparation of Triboelectric Nanogenerators with CNT-Containing and Micro-structure PDMS Composite Films[J]. Journal of Mechanical Engineering, 2021, 57(15): 177-185.

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