scholarly journals Biomechanical energy harvest based on textiles used in self-powering clothing

2020 ◽  
Vol 15 ◽  
pp. 155892502096735
Author(s):  
Li Niu ◽  
Xuhong Miao ◽  
Gaoming Jiang ◽  
Ailan Wan ◽  
Yutian Li ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
High Efficiency ◽  
Structural Features ◽  
Human Motion ◽  
Energy Harvest ◽  
Triboelectric Nanogenerator ◽  
Wearable Electronics ◽  
Practical Applications ◽  
Triboelectric Nanogenerators ◽  
New Generation

Advanced triboelectric nanogenerator techniques provide a massive opportunity for the development of new generation wearable electronics, which toward multi-function and self-powering. Textiles have been refreshed with the requirement of flexible electronics in recent decades. In particular, knitted-textiles have exhibited enormous and prominent potential possibilities for smart wearable devices, which are based on the merits of high stretchability, excellent elasticity, comfortability as well as compatibility. Combined knitted textiles with nanogenerator techniques will promote the knitted textile triboelectric nanogenerators (KNGs) emerging, endowing conventional textiles with biomechanical energy harvesting and sensing energy supplied abilities. However, the design of KNGs and the construction of KNGs are based on features of human motions symbolizing considerable challenges in both high efficiency and excellent comfort. Currently, this review is concerned with KNGs construction account of triboelectric effects referring to knitted-textile classifications, structural features, human motion energy traits, working mechanisms, and practical applications. Moreover, the remaining challenges of industrial production and the future prospects of knitted-textile triboelectric nanogenerators of harvesting biomechanical energy are presented.

scholarly journals Wearable triboelectric nanogenerator using a plasma-etched PDMS–CNT composite for a physical activity sensor

RSC Advances ◽  
2017 ◽  
Vol 7 (76) ◽  
pp. 48368-48373 ◽  
Author(s):  
Min-Ki Kim ◽  
Myoung-Soo Kim ◽  
Hong-Bum Kwon ◽  
Sung-Eun Jo ◽  
Yong-Jun Kim
Keyword(s):  
Physical Activity ◽  
Carbon Nanotube ◽  
Human Motion ◽  
Triboelectric Nanogenerator ◽  
Effective Energy ◽  
Energy Harvesters ◽  
Motion Energy ◽  
Fluorocarbon Plasma ◽  
Triboelectric Nanogenerators

Triboelectric nanogenerators (TENGs) have recently shown promising potential as effective energy harvesters using human motion energy. We propose a flexible TENG with a fluorocarbon plasma-etched polydimethylsiloxane (PDMS)–carbon nanotube (CNT).

scholarly journals PDMS Microfabrication and Design for Microfluidics and Sustainable Energy Application: Review

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1350
Author(s):  
Lin Lin ◽  
Chen-Kuei Chung
Keyword(s):  
Process Integration ◽  
Material Selection ◽  
Sustainable Energy ◽  
Mechanical Energy ◽  
Hydrophobic Surface ◽  
Triboelectric Nanogenerator ◽  
Wearable Electronics ◽  
Practical Applications ◽  
Hydrophobic Recovery ◽  
Optical Examination

The polydimethylsiloxane (PDMS) is popular for wide application in various fields of microfluidics, microneedles, biology, medicine, chemistry, optics, electronics, architecture, and emerging sustainable energy due to the intrinsic non-toxic, transparent, flexible, stretchable, biocompatible, hydrophobic, insulating, and negative triboelectric properties that meet different requirements. For example, the flexibility, biocompatibility, non-toxicity, good stability, and high transparency make PDMS a good candidate for the material selection of microfluidics, microneedles, biomedical, and chemistry microchips as well as for optical examination and wearable electronics. However, the hydrophobic surface and post-surface-treatment hydrophobic recovery impede the development of self-driven capillary microchips. How to develop a long-term hydrophilicity treatment for PDMS is crucial for capillary-driven microfluidics-based application. The dual-tone PDMS-to-PDMS casting for concave-and-convex microstructure without stiction is important for simplifying the process integration. The emerging triboelectric nanogenerator (TENG) uses the transparent flexible PDMS as the high negative triboelectric material to make friction with metals or other positive-triboelectric material for harvesting sustainably mechanical energy. The morphology of PDMS is related to TENG performance. This review will address the above issues in terms of PDMS microfabrication and design for the efficient micromixer, microreactor, capillary pump, microneedles, and TENG for more practical applications in the future.

scholarly journals Energy Harvesting Materials and Structures for Smart Textile Applications: Recent Progress and Path Forward

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6297
Author(s):  
Patricia I. Dolez
Keyword(s):  
Energy Harvesting ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Organic Films ◽  
Wearable Electronics ◽  
Smart Textile ◽  
Thermoelectric Energy ◽  
Inorganic Films ◽  
Thermoelectric Energy Harvesting ◽  
Triboelectric Nanogenerators

A major challenge with current wearable electronics and e-textiles, including sensors, is power supply. As an alternative to batteries, energy can be harvested from various sources using garments or other textile products as a substrate. Four different energy-harvesting mechanisms relevant to smart textiles are described in this review. Photovoltaic energy harvesting technologies relevant to textile applications include the use of high efficiency flexible inorganic films, printable organic films, dye-sensitized solar cells, and photovoltaic fibers and filaments. In terms of piezoelectric systems, this article covers polymers, composites/nanocomposites, and piezoelectric nanogenerators. The latest developments for textile triboelectric energy harvesting comprise films/coatings, fibers/textiles, and triboelectric nanogenerators. Finally, thermoelectric energy harvesting applied to textiles can rely on inorganic and organic thermoelectric modules. The article ends with perspectives on the current challenges and possible strategies for further progress.

Flexible Capacitive Pressure Sensors with Micro-Patterned Porous Dielectric Layer for Wearable Electronics

2022 ◽  
Author(s):  
Jing Wang ◽  
Longwei Li ◽  
Lanshuang Zhang ◽  
Panpan Zhang ◽  
Xiong Pu
Keyword(s):  
Pressure Sensor ◽  
Flexible Electronics ◽  
Dielectric Layer ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Capacitive Sensor ◽  
Human Motion ◽  
Capacitive Pressure Sensor ◽  
Wearable Electronics ◽  
Emulsified Water

Abstract Highly sensitive soft sensors play key roles in flexible electronics, which therefore have attracted much attention in recent years. Herein, we report a flexible capacitive pressure sensor with high sensitivity by using engineered micro-patterned porous polydimethylsiloxane (PDMS) dielectric layer through an environmental-friendly fabrication procedure. The porous structure is formed by evaporation of emulsified water droplets during PDMS curing process, while the micro-patterned structure is obtained via molding on sandpaper. Impressively, this structure renders the capacitive sensor with a high sensitivity up to 143.5 MPa-1 at the pressure range of 0.068~150 kPa and excellent anti-fatigue performance over 20,000 cycles. Meanwhile, the sensor can distinguish different motions of the same person or different people doing the same action. Our work illustrates the promising application prospects of this flexible pressure sensor for the security field or human motion monitoring area.

A high-output triboelectric nanogenerator based on nickel–copper bimetallic hydroxide nanowrinkles for self-powered wearable electronics

2020 ◽  
Vol 8 (48) ◽  
pp. 25995-26003
Author(s):  
Kequan Xia ◽  
Di Wu ◽  
Jiangming Fu ◽  
Nur Amin Hoque ◽  
Ying Ye ◽  
...  
Keyword(s):  
Mechanical Energy ◽  
Human Motion ◽  
Triboelectric Nanogenerator ◽  
Wearable Electronics ◽  
Nickel Copper ◽  
Self Powered ◽  
High Output

This study provides a novel wearable TENG based on nickel–copper bimetallic hydroxide nanowrinkles (NC-TENG) to harvest the mechanical energy from human motion.

Rationally Segmented Triboelectric Nanogenerator with Constant Direct-Current Output and Low Crest Factor

2021 ◽  
Author(s):  
Pengfei Chen ◽  
Jie An ◽  
Renwei Cheng ◽  
Sheng Shu ◽  
Andy Berbille ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Direct Current ◽  
Triboelectric Nanogenerator ◽  
Crest Factor ◽  
Current Output ◽  
Practical Applications ◽  
Triboelectric Nanogenerators

Despite great potential of triboelectric nanogenerators (TENGs) as a promising energy harvesting technology, their practical applications are still hindered by their pulsed outputs with high crest factor. Here, through a...

Highly efficient self-healable and dual responsive hydrogel-based deformable triboelectric nanogenerators for wearable electronics

2019 ◽  
Vol 7 (23) ◽  
pp. 13948-13955 ◽  
Author(s):  
Qingbao Guan ◽  
Guanghui Lin ◽  
Yuzhu Gong ◽  
Jingfeng Wang ◽  
Weiyi Tan ◽  
...  
Keyword(s):  
Near Infrared ◽  
Triboelectric Nanogenerator ◽  
Self Healing ◽  
Wearable Electronics ◽  
Highly Efficient ◽  
Dual Responsive ◽  
Nir Light ◽  
Triboelectric Nanogenerators

A soft hydrogel based self-healing triboelectric nanogenerator (HS-TENG) is highly deformable, and both mechanically and electrically self-healable upon exposure to water spraying and near-infrared (NIR) light.

scholarly journals Self-driven WSe2 photodetectors enabled with asymmetrical van der Waals contact interfaces

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Changjian Zhou ◽  
Shouyong Zhang ◽  
Zhe Lv ◽  
Zichao Ma ◽  
Cui Yu ◽  
...  
Keyword(s):  
Fermi Level ◽  
Flexible Electronics ◽  
2D Materials ◽  
Photovoltaic Effect ◽  
Van Der Waals ◽  
The Self ◽  
Level Shift ◽  
Wearable Electronics ◽  
Practical Applications ◽  
Msm Photodetector

AbstractSelf-driven photodetectors that can detect light without any external voltage bias are important for low-power applications, including future internet of things, wearable electronics, and flexible electronics. While two-dimensional (2D) materials exhibit good optoelectronic properties, the extraordinary properties have not been fully exploited to realize high-performance self-driven photodetectors. In this paper, a metal–semiconductor–metal (MSM) photodetector with graphene and Au as the two contacts have been proposed to realize the self-driven photodetector. Van der Waals contacts are formed by dry-transfer methods, which is important in constructing the asymmetrical MSM photodetector to avoid the Fermi-level pinning effect. By choosing graphene and Au as the two contact electrodes, a pronounced photovoltaic effect is obtained. Without any external bias, the self-driven photodetector exhibits a high responsivity of 7.55 A W−1 and an ultrahigh photocurrent-to-dark current ratio of ~108. The photodetector also shows gate-tunable characteristics due to the field-induced Fermi-level shift in the constituent 2D materials. What is more, the high linearity of the photodetector over almost 60 dB suggests the easy integration with processing circuits for practical applications.

scholarly journals Recent Progress in Triboelectric Nanogenerators as a Renewable and Sustainable Power Source

2016 ◽  
Vol 2016 ◽  
pp. 1-24 ◽  
Author(s):  
Zhiming Lin ◽  
Jun Chen ◽  
Jin Yang
Keyword(s):  
Large Scale ◽  
Sliding Mode ◽  
Mechanical Energy ◽  
Electronic Devices ◽  
Power Source ◽  
Human Motion ◽  
Free Standing ◽  
Practical Applications ◽  
Triboelectric Nanogenerators ◽  
Sustainable Power

The newly developed triboelectric nanogenerators (TENGs) provide an excellent approach to convert mechanical energy into electricity, which are mainly based on the coupling between triboelectrification and electrostatic induction. The TENG has the potential of harvesting many kinds of mechanical energies such as vibration, rotation, wind, human motion, and even water wave energy, which could be a new paradigm for scavenging large scale energy. It also demonstrates a possible route towards practical applications for powering electronic devices. This paper presents a comprehensive review of the four modes of TENGs: vertical contact-separation mode, in-plane sliding mode, single-electrode mode, and free-standing triboelectric-layer mode. The performance enhancements of TENGs for harvesting energy as a sustainable power source are also discussed. In addition, recent reports on the hybridized nanogenerator are introduced, which may enable fully self-powered electronic devices. Finally, the practical applications of TENGs for energy harvesting are presented.

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