Thin, soft, skin-integrated foam-based triboelectric nanogenerators for tactile sensing and energy harvesting

Wu, Mengge; Gao, Zhan; Yao, Kuanming; Hou, Senlin; Liu, Y.; Li, D.; He, Jiahui; Huang, Xingcan; Song, Enming; Yu, Junsheng; Yu, Xinge

doi:10.1016/j.mtener.2021.100657

Cited by 56 publications

(45 citation statements)

References 64 publications

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“…Soft-surface contact is another effective approach that largely improves transferred charges by increasing the contact area. There are several benefits to using the soft contact interface for fabricating TENGs [79,80]. Firstly, more effective energy harvesting and higher sensitivity of soft TENGs can be realized under a tiny external mechanical stimulation.…”

Section: Soft Contacted Interfacementioning

confidence: 99%

Smart Textile Triboelectric Nanogenerators: Prospective Strategies for Improving Electricity Output Performance

Dong

Xiao

Cheng

et al. 2022

Nanoenergy Advances

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By seamlessly integrating the wearing comfortability of textiles with the biomechanical energy harvesting function of a triboelectric nanogenerator (TENG), an emerging and advanced intelligent textile, i.e., smart textile TENG, is developed with remarkable abilities of autonomous power supply and self-powered sensing, which has great development prospects in the next-generation human-oriented wearable electronics. However, due to inadequate interface contact, insufficient electrification of materials, unavoidable air breakdown effect, output capacitance feature, and special textile structure, there are still several bottlenecks in the road towards the practical application of textile TENGs, including low output, high impedance, low integration, poor working durability, and so on. In this review, on the basis of mastering the existing theory of electricity generation mechanism of TENGs, some prospective strategies for improving the mechanical-to-electrical conversion performance of textile TENGs are systematically summarized and comprehensively discussed, including surface/interface physical treatments, atomic-scale chemical modification, structural optimization design, work environmental control, and integrated energy management. The advantages and disadvantages of each approach in output enhancement are further compared at the end of this review. It is hoped that this review can not only provide useful guidance for the research of textile TENGs to select optimization methods but also accelerate their large-scale practical process.

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Section: Soft Contacted Interfacementioning

confidence: 99%

Smart Textile Triboelectric Nanogenerators: Prospective Strategies for Improving Electricity Output Performance

Dong

Xiao

Cheng

et al. 2022

Nanoenergy Advances

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“…[ 18,19 ] Moreover, the electrical pulse generated from TENG can be used as an effective feedback signal to reveal and differentiate the attributes of external stimuli, showing great potential in self‐powered tactile sensors with no extra power. [ 10,20,21 ] However, TENGs used for power source and tactile sensor mostly used metal materials as current collectors, resulting in the nonextensibility of devices. To this end, in recent years, many efforts have focused on the development of deformable electrodes, such as elastic polymers embedded with conductive fillers (Ag nanowire, [ 22,23 ] carbon nanotube, [ 24,25 ] etc.…”

Section: Introductionmentioning

confidence: 99%

Autonomously Adhesive, Stretchable, and Transparent Solid‐State Polyionic Triboelectric Patch for Wearable Power Source and Tactile Sensor

Bai

Lee

et al. 2021

Adv Funct Materials

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Robust power supplies and self‐powered sensors that are extensible, autonomously adhesive, and transparent are highly desirable for next‐generation electronic/energy/robotic applications. In the work, a solid‐state triboelectric patch integrated with the above features (≈318% elongation, >85% average transmission, ≈44.3 N m−1 adhesive strength) is developed using polyethylene oxide/waterborne polyurethane/phytic acid composite (abbreviated as PWP composite) as an effective current collector and silicone rubber as tribolayer. The PWP composite is optimized systematically and corresponding single‐electrode device can supply a power density of 2.3 W m−2 at 75% strain. The triboelectric patch is capable of charging capacitors and powering electronics by efficiently harvesting biomechanical energies. Moreover, it can be autonomously attached to nonplanar skin or apparel substrates and used as a tactile sensor or an epidermal input touchpad for physiological motion detection and remote control of appliances, respectively. Even after dynamic deformation, tailoring, and prolonged use, the patch can maintain good stability and reliability of electrical outputs. This work provides a novel solid‐state and liquid‐free polyionic electrode‐based triboelectric nanogenerator integrated with adhesiveness, stretchability, and transparency, which can meet wide application needs from transparent electronics, artificial skins, to smart interfaces.

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“…Benefiting from its good stretchability, skin compatibility and excellent responsiveness to pressure, strain, and temperature, e-skin tends to mimic human skin by sensing external stimuli 6 – 8 . Based on wearable tactile sensors, such as transistor-based strain sensors 9 – 11 , resistive sensors 12 , 13 , and nanogenerators 14 – 19 , the corresponding applied force and temperature can be measured to provide tactile information. When a prosthesis contains e-skin with many sensors, the acquired tactile signals can be transmitted to the artificial nervous system to provide the prosthesis with tactile sensation, corresponding exactly to the skin’s ability to perceive passive sensations 20 – 23 .…”

Section: Introductionmentioning

confidence: 99%

Miniaturization of mechanical actuators in skin-integrated electronics for haptic interfaces

Song

et al. 2021

Microsyst Nanoeng

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Skin-integrated electronics, also known as electronic skin (e-skin), are rapidly developing and are gradually being adopted in biomedical fields as well as in our daily lives. E-skin capable of providing sensitive and high-resolution tactile sensations and haptic feedback to the human body would open a new e-skin paradigm for closed-loop human–machine interfaces. Here, we report a class of materials and mechanical designs for the miniaturization of mechanical actuators and strategies for their integration into thin, soft e-skin for haptic interfaces. The mechanical actuators exhibit small dimensions of 5 mm diameter and 1.45 mm thickness and work in an electromagnetically driven vibrotactile mode with resonance frequency overlapping the most sensitive frequency of human skin. Nine mini actuators can be integrated simultaneously in a small area of 2 cm × 2 cm to form a 3 × 3 haptic feedback array, which is small and compact enough to mount on a thumb tip. Furthermore, the thin, soft haptic interface exhibits good mechanical properties that work properly during stretching, bending, and twisting and therefore can conformally fit onto various parts of the human body to afford programmable tactile enhancement and Braille recognition with an accuracy rate over 85%.

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Thin, soft, skin-integrated foam-based triboelectric nanogenerators for tactile sensing and energy harvesting

Cited by 56 publications

References 64 publications

Smart Textile Triboelectric Nanogenerators: Prospective Strategies for Improving Electricity Output Performance

Smart Textile Triboelectric Nanogenerators: Prospective Strategies for Improving Electricity Output Performance

Autonomously Adhesive, Stretchable, and Transparent Solid‐State Polyionic Triboelectric Patch for Wearable Power Source and Tactile Sensor

Miniaturization of mechanical actuators in skin-integrated electronics for haptic interfaces

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