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Micromachines
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Tribology Prospects in Advanced Triboelectric Nanogenerators
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Tribology Prospects in Advanced Triboelectric Nanogenerators

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A：Physics".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 9040

Special Issue Editors

Dr. Pengfei Wang

E-Mail Website
Guest Editor
College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China
Interests: low-friction mechanisms of solid lubrication coatings; triboelectrification of carbon-based coatings; triboelectric nanogenerator; self-powered smart sensor
Dr. Weiqiang Zhang

E-Mail Website1 Website2
Guest Editor
School of Aerospace Science and Technology, Xidian University of Technology, Xi'an 710126, China
Interests: nanotribology; energy harvesting; triboelectric nanogenerator; sensors for self-powered system; contact-electrification-based sensor technology
Special Issues, Collections and Topics in MDPI journals
Dr. Guanggui Cheng

E-Mail Website
Guest Editor
Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China
Interests: surface and interface; tribology; flexible mechatronics; energy harvest

Special Issue Information

Dear Colleagues,

When two different materials are in contact with one another, a charge transfer occurs on the surface; moreover, when the two materials are separated, an equal amount of positive or negative charge accumulates on the surface, otherwise known as triboelectrification—an old and interesting phenomenon. Up to now, the interpretation of its mechanism has been controversial, and a unified theory has not yet been formed. Wang's triboelectric nanogenerator (TENG) invention in 2012, which uses the synergetic effect of triboelectrification and electrostatic induction to generate electricity, greatly boosted progress in the development of microdevices for scavenging disordered and tiny low-frequency energies in our daily lives, indicating an efficient strategy for solving the ubiquitous energy crisis and worldwide environmental issues. However, friction, wear and lubrication issues play an extremely important role in achieving the ultra-long-term stability and durability of the TENG in practical engineering applications. The exploration and preservation of low-friction and low-wear behaviors and the clarification of the underlying mechanisms in contact interfaces is of great significance when promoting large-scale applications of the TENG in the intelligent mechanical equipment industry. Accordingly, this Special Issue seeks to showcase research papers, communications and review articles focusing on recent advances in the friction, wear, and lubrication of the TENG for promoting its performance, exploring mechanisms, enhancing sensing behaviors, etc.

Dr. Pengfei Wang
Dr. Weiqiang Zhang
Dr. Guanggui Cheng
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • triboelectric nanogenerator
  • triboelectrification
  • charge transfer
  • tribology
  • friction
  • wear
  • lubrication
  • durability

Published Papers (4 papers)

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Research

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19 pages, 6925 KiB  
Article
Super-Low Friction Electrification Achieved on Polytetrafluoroethylene Films-Based Triboelectric Nanogenerators Lubricated by Graphene-Doped Silicone Oil
by Junzhao Chen, Yu Zhao, Ruirui Wang and Pengfei Wang
Micromachines 2023, 14(9), 1776; https://doi.org/10.3390/mi14091776 - 16 Sep 2023
Viewed by 1282
Abstract
The novel proposal of Wang’s triboelectric nanogenerator (TENG) has inspired extensive efforts to explore energy harvesting devices from the living environment for the upcoming low-carbon society. The inevitable friction and wear problems of the tribolayer materials become one of the biggest obstacles for [...] Read more.
The novel proposal of Wang’s triboelectric nanogenerator (TENG) has inspired extensive efforts to explore energy harvesting devices from the living environment for the upcoming low-carbon society. The inevitable friction and wear problems of the tribolayer materials become one of the biggest obstacles for attaining high-performance TENGs. To achieve super-low friction electrification of the TENGs, the tribological and electrical behaviors of the sliding-mode TENGs based on polytetrafluoroethylene (PTFE) films and metallic balls under both dry friction and liquid lubrication conditions were investigated by using a customized testing platform with a ball-on-flat configuration. Most interestingly, a super-low friction coefficient of 0.008 was achieved under graphene-doped silicone oil lubrication. The corresponding wear rate of the PTFE film was drastically decreased to 8.19 × 10−5 mm3/Nm. Simultaneously, the output short-circuit current and open-circuit voltage were enhanced by 6.8 times and 3.0 times, respectively, compared to the dry friction condition. The outstanding triboelectrical performances of the PTFE film when sliding against a steel ball are attributed to the synergistic lubricating effects of the silicone oil and the graphene nanosheets. The current research provides valuable insights into achieving the macro-scale superlubricity of the TENGs in practical industrial applications. Full article
(This article belongs to the Special Issue Tribology Prospects in Advanced Triboelectric Nanogenerators)
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25 pages, 12736 KiB  
Article
Triboelectric Nanogenerators for Efficient Low-Frequency Ocean Wave Energy Harvesting with Swinging Boat Configuration
by Jin Yan, Zhi Tang, Naerduo Mei, Dapeng Zhang, Yinghao Zhong and Yuxuan Sheng
Micromachines 2023, 14(4), 748; https://doi.org/10.3390/mi14040748 - 28 Mar 2023
Cited by 3 | Viewed by 1739
Abstract
To reach ocean resources, sea activities and marine equipment variety are increasing, requiring offshore energy supply. Marine wave energy, the marine renewable energy with the most potential, offers massive energy storage and great energy density. This research proposes a swinging boat-type triboelectric nanogenerator [...] Read more.
To reach ocean resources, sea activities and marine equipment variety are increasing, requiring offshore energy supply. Marine wave energy, the marine renewable energy with the most potential, offers massive energy storage and great energy density. This research proposes a swinging boat-type triboelectric nanogenerator concept for low-frequency wave energy collection. Triboelectric electronanogenerators with electrodes and a nylon roller make up the swinging boat-type triboelectric nanogenerator (ST-TENG). COMSOL electrostatic simulations and power generation concepts of independent layer and vertical contact separation modes of operation explain the device functionality. By rolling the drum at the bottom of the integrated boat-like device, it is possible to capture wave energy and convert it into electrical energy. Based on it, the ST load, TENG charging, and device stability are evaluated. According to the findings, the maximum instantaneous power of the TENG in the contact separation and independent layer modes reaches 246 W and 112.5 μW at matched loads of 40 MΩ and 200 MΩ, respectively. Additionally, the ST-TENG can retain the usual functioning of the electronic watch for 45 s while charging a 33 µF capacitor to 3 V in 320 s. Long-term low-frequency wave energy collection is possible with the device. The ST-TENG develops novel methods for large-scale blue energy collection and maritime equipment power. Full article
(This article belongs to the Special Issue Tribology Prospects in Advanced Triboelectric Nanogenerators)
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Review

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30 pages, 11611 KiB  
Review
Research Progress in Fluid Energy Collection Based on Friction Nanogenerators
by Jin Yan, Yuxuan Sheng, Dapeng Zhang and Zhi Tang
Micromachines 2024, 15(1), 40; https://doi.org/10.3390/mi15010040 - 24 Dec 2023
Viewed by 958
Abstract
In recent decades, the development of electronic technology has provided opportunities for the Internet of Things, biomedicine, and energy harvesting. One of the challenges of the Internet of Things in the electrification era is energy supply. Centralized energy supply has been tested over [...] Read more.
In recent decades, the development of electronic technology has provided opportunities for the Internet of Things, biomedicine, and energy harvesting. One of the challenges of the Internet of Things in the electrification era is energy supply. Centralized energy supply has been tested over hundreds of years of history, and its advantages such as ideal output power and stable performance are obvious, but it cannot meet the specific needs of the Internet of Things, and distributed energy supply also has a large demand. Since the invention of nanogenerators, another promising solution for fluid energy harvesting has been opened up. The triboelectric nanogenerator is an emerging platform technology for electromechanical energy conversion, which can realize the collection of fluid energy such as wind energy and wave energy. In this paper, we first introduce the fundamentals of triboelectric nanogenerators and their applications in wind and wave energy harvesting devices. We then discuss the methods of device optimization in the next development of TENG and conclude by considering the future prospects and challenges for triboelectric nanogenerator harvesting devices. Full article
(This article belongs to the Special Issue Tribology Prospects in Advanced Triboelectric Nanogenerators)
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27 pages, 12978 KiB  
Review
Triboelectric Nanogenerators Based on 2D Materials: From Materials and Devices to Applications
by Yukai Zhou, Jia-Han Zhang, Songlin Li, Hao Qiu, Yi Shi and Lijia Pan
Micromachines 2023, 14(5), 1043; https://doi.org/10.3390/mi14051043 - 12 May 2023
Cited by 5 | Viewed by 2953
Abstract
Recently, there has been an increasing consumption of fossil fuels such as oil and natural gas in both industrial production and daily life. This high demand for non-renewable energy sources has prompted researchers to investigate sustainable and renewable energy alternatives. The development and [...] Read more.
Recently, there has been an increasing consumption of fossil fuels such as oil and natural gas in both industrial production and daily life. This high demand for non-renewable energy sources has prompted researchers to investigate sustainable and renewable energy alternatives. The development and production of nanogenerators provide a promising solution to address the energy crisis. Triboelectric nanogenerators, in particular, have attracted significant attention due to their portability, stability, high energy conversion efficiency, and compatibility with a wide range of materials. Triboelectric nanogenerators (TENGs) have many potential applications in various fields, such as artificial intelligence (AI) and the Internet of Things (IoT). Additionally, by virtue of their remarkable physical and chemical properties, two-dimensional (2D) materials, such as graphene, transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), MXenes, and layered double hydroxides (LDHs), have played a crucial role in the advancement of TENGs. This review summarizes recent research progress on TENGs based on 2D materials, from materials to their practical applications, and provides suggestions and prospects for future research. Full article
(This article belongs to the Special Issue Tribology Prospects in Advanced Triboelectric Nanogenerators)
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