Anisotropic tribology and electrification properties of sliding-mode triboelectric nanogenerator with groove textures

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Friction Pub Date : 2024-05-07 DOI:10.1007/s40544-024-0861-z
Weixu Yang, Jieyang Wang, Xiaoli Wang, Ping Chen
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引用次数: 0

Abstract

Sliding-mode triboelectric nanogenerator (S-TENG) is based on the coupling of triboelectrification and electrostatic induction, converting electrical energy from sliding motion. Introducing micro-textures into the sliding surface, and adjusting the angle between the texture and sliding direction (direction angle) may achieve performance anisotropy, which provides novel ideas for optimizing the tribology and electrification performance of S-TENG. To guide the performance optimization based on the anisotropy, in this paper, groove micro-textures were fabricated on the surface of S-TENG, and anisotropic tribology and electrification performance were obtained through changing the direction angle. Based on the surface analysis and after-cleaning tests, the mechanism of the anisotropy was explained. It is shown that the anisotropy of friction coefficient can be attributed to the changes of texture edge induced resistance and groove captured wear debris, while the voltage anisotropy is due to the variations of debris accumulated on the sliding interface and the resulting charge neutralization. Among the selected 0°–90° direction angles, S-TENG at angle of 90° exhibits relatively small stable friction coefficient and high open-circuit voltage, and thus it is recommended for the performance optimization. The open-circuit voltage is not directly associated with the friction coefficient, but closely related to the wear debris accumulated on the sliding interface. This study presents a simple and convenient method to optimize the performance of S-TENG, and help understand the correlation between its tribology and electrical performance.

Abstract Image

具有凹槽纹理的滑动模式三电纳米发电机的各向异性摩擦学和电气化特性
滑动模式三电纳米发电机(S-TENG)基于三电和静电感应的耦合,从滑动运动中转换电能。在滑动表面引入微纹理,并调整纹理与滑动方向的夹角(方向角)可实现性能各向异性,这为优化 S-TENG 的摩擦学和电气化性能提供了新思路。为了指导基于各向异性的性能优化,本文在 S-TENG 表面制作了沟槽微纹理,并通过改变方向角获得了各向异性的摩擦学和电气化性能。基于表面分析和清洁后测试,解释了各向异性的机理。结果表明,摩擦系数的各向异性可归因于纹理边缘诱导电阻和沟槽捕获的磨损碎片的变化,而电压的各向异性则是由于滑动界面上积累的碎片的变化以及由此产生的电荷中和。在所选的 0°-90° 方向角中,90° 角的 S-TENG 显示出相对较小的稳定摩擦系数和较高的开路电压,因此推荐用于性能优化。开路电压与摩擦系数没有直接关系,但与滑动界面上积累的磨损碎片密切相关。本研究提出了一种简单方便的方法来优化 S-TENG 的性能,并有助于理解其摩擦学与电气性能之间的相关性。
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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
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