Human–Machine Interfacing Enabled by Triboelectric Nanogenerators and Tribotronics

Ding, Wenbo; Wang, Aurelia C.; Wu, Changsheng; Guo, Hengyu; Wang, Zhong Lin

doi:10.1002/admt.201800487

Cited by 187 publications

(98 citation statements)

References 151 publications

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“…Triboelectric nanogenerators (TENGs) have been invented through this effect, which could act as a promising technology for harvesting mechanical energy, and are widely applied for active sensors and implantable medical devices . Various commercial organic materials (e.g., nylon, cotton, silk, PVDF, rubber) and inorganic materials (e.g., MoS 2 , MoSe 2 , WS 2 , WSe 2 , TiO 2 , Si) have been utilized to prepare TENGs and have exhibited remarkable performance . Some advanced materials, such as hydrogels, carbon materials (graphene and carbon nanotubes (CNT)) and natural biodegradable materials, have also been investigated for their triboelectricity in TENGs …”

Section: Materials For Energy Conversion Devicesmentioning

confidence: 99%

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

et al. 2019

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body is actually a tremendous storehouse of energy that is generated from body heat and motion. [15][16][17][18][19] Power generation from breathing, heating, blood transport, arm motion, typing, and walking could reach to over 100 W for a 68 kg adult's daily activities (Figure 1). [20] Thus, converting 1% of power from the human body may be enough to support the work of most portable electronics.In the past two decades, researchers have developed several energy conversion devices based on piezoelectricity, electrostaticity, triboelectricity, or thermoelectricity that can directly harvest the mechanical or thermal energy and convert it into electric energy (these conversion devices are so-called nanogenerators (NGs)). [21][22][23][24][25] The first nanogenerator (NG) based on ZnO was invented by Prof. Wang in 2006; after that, various NGs were developed to harvest the mechanical or thermal energy with the output performance increasing gradually. [26] These NGs are easy-to-construct flexible devices since most materials for these devices are polymers and nanomaterials. Generally, the flexible devices assembled by film materials can be stretchable and bendable in one direction. But their lack of air-permeability, poor 3D deformation, and low damage tolerance limit their application, especially for wearable electronics. Therefore, fiberbased energy conversion devices have been designed. [27] These fiber-based devices can also be knitted to yarn or fabric in the clothing system to build up a large area electronic system. [28,29] The energy generation and internal charging can be realized by means of a self-powered system that harvests the energy from natural sources around the human body to sustain the wearable electronics. [30][31][32] The search for functional materials that possess good conversion efficiency, as well as great mechanical and environmental stability, combined with a novel device design might push these devices to meet the requirement of a practical application. In the past decade, numerous contributions have been offered to improve the performance of fiber-based energy conversion devices (FBECD) and extend its application. This review specifically summarizes FBECD with different energy conversion mechanisms including piezoelectricity, electrostaticity, triboelectricity, and thermoelectricity in recent processes (Figure 2). The functional materials, fiber fabrication techniques, and device design strategies for different classes of FBECDs are covered in the article. We also introduce an overview of the fiber-based self-powered system and sensors and Following the rapid development of lightweight and flexible smart electronic products, providing energy for these electronics has become a hot research topic. The human body produces considerable mechanical and thermal energy during daily activities, which could be used to power most wearable electronics. In this context, fiber-based energy conversion devices (FBECD) are proposed as candidates for effective conversion of human-body energy into electricity...

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Section: Materials For Energy Conversion Devicesmentioning

confidence: 99%

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

et al. 2019

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“…Similar structures are frequently employed for wind energy and rain-drop energy harvesting. 146 TENGs with SFT structure can harvest energy from moving objects while the system can still mobile without grounding wires, 147 which is suitable for harvesting rotating motion energy, human walking, and air flow, etc. Guo et al reported a TENG consisting of checker-like interdigital metal electrodes (aluminum [Al]) and a sandwiched PET film, which can convert translational kinetic energy in all directions 141 as shown in Figure 7C.…”

Section: Structural Designmentioning

confidence: 99%

Recent progress on flexible nanogenerators toward self‐powered systems

Liu

Wang

Zhao

et al. 2020

InfoMat

107

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The advances in wearable/flexible electronics have triggered tremendous demands for flexible power sources, where flexible nanogenerators, capable of converting mechanical energy into electricity, demonstrate its great potential. Here, recent progress on flexible nanogenerators for mechanical energy harvesting toward self‐powered systems, including flexible piezoelectric and triboelectric nanogenerator, is reviewed. The emphasis is mainly on the basic working principle, the newly developed materials and structural design as well as associated typical applications for energy harvesting, sensing, and self‐powered systems. In addition, the progress of flexible hybrid nanogenerator in terms of its applications is also highlighted. Finally, the challenges and future perspectives toward flexible self‐powered systems are reviewed.

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“…The contact and separation of two materials generates contact electrification (CE) (or triboelectrification), and the triboelectric nanogenerator (TENG) was invented accordingly . The TENG has opened up a special field of energy transfer via the efficient collection of mechanical energy and has been widely used in a variety of areas including environmental sensing, wearable electronic devices, human–machine interfacing, as well as blue energy . The rapid development of the TENG led to a reconsideration of the core mechanisms of CE, such as the characteristics of transferred charges and the reason for long‐term maintenance of generated charges on the surface of materials .…”

Section: Introductionmentioning

confidence: 99%

Effects of Metal Work Function and Contact Potential Difference on Electron Thermionic Emission in Contact Electrification

Zhang

Wang

et al. 2019

Adv Funct Materials

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TENG are prepared in this study. After introducing initial charges on the Al 2 O 3 surface of the TENGs, the long-term evolution of surface charge quantity is investigated at different temperatures. The results show that charge variation of all the TENGs is analogous to exponential decay and is in accord with the thermionic emission model, verifying the electron transfer dominated mechanism of CE. Additionally, it is explored for the first time that the potential barrier of materials can be regulated by changing the contacting metals or dielectrics. Regulation of the barrier at high temperatures fully excludes the influence of ions from moisture and functional groups, which further indicates the dominant role played by electron transfer in CE. Surface state models for explaining barrier regulation during CE for both metal-dielectric and dielectric-dielectric pairs are proposed. This study provides a new perspective of the exploration of CE, and a novel method for further increasing or rapidly eliminating electrification of charged materials.

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Human–Machine Interfacing Enabled by Triboelectric Nanogenerators and Tribotronics

Cited by 187 publications

References 151 publications

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

Recent progress on flexible nanogenerators toward self‐powered systems

Effects of Metal Work Function and Contact Potential Difference on Electron Thermionic Emission in Contact Electrification

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