Advanced Fiber Materials for Wearable Electronics

Zhu, Chuang; Wu, Jiawei; Yan, Jianhua; Liu, Xuqing

doi:10.1007/s42765-022-00212-0

Cited by 142 publications

(79 citation statements)

References 155 publications

(145 reference statements)

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“…[20,99,100] Carbon cloth, carbon fiber paper, nickel foam, and stainless-steel mesh are the commonly used substrates for the fabrication of self-supporting air cathodes, while graphene sheets, carbon nanotubes (CNTs) and carbon nanofibers (CNFs) are designed for free-standing air cathodes. [101][102][103] Through acid oxidation treatment and air calcination, Kordek et al [104] fabricated a nanoporous carbon cloth-based air cathode (CC-AC) decorated with plentiful oxygen-containing functional groups (Figure 9a). When directly used in wearable aqueous [94] Copyright 2019, Wiley-VCH.…”

Section: Flexible Air Cathodes Prepared By An In Situ Fabrication Met...mentioning

confidence: 99%

“…[ 20,99,100 ] Carbon cloth, carbon fiber paper, nickel foam, and stainless‐steel mesh are the commonly used substrates for the fabrication of self‐supporting air cathodes, while graphene sheets, carbon nanotubes (CNTs) and carbon nanofibers (CNFs) are designed for free‐standing air cathodes. [ 101–103 ]…”

Section: Components Of Wearable Aqueous Metal‐air Batteriesmentioning

confidence: 99%

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Recent Advances in Wearable Aqueous Metal‐Air Batteries: From Configuration Design to Materials Fabrication

Chen

Fang

2023

Adv Materials Technologies

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The advent of the information age has promoted the development of smart wearable electronics for acquiring real-time data, such as smart bracelets, real-time health monitors, electronic skins, and smart clothes, [1][2][3][4][5][6][7][8][9] which has in turn promoted the development of power supply systems with high operational safety, long cycle life, high energy, and excellent deformability. Among recently developed flexible power supplies, [10][11][12][13][14] flexible lithium-ion (Li-ion) batteries have been dominantly employed in wearable electronics because of competitive chargedischarge efficiency (≈90%), high energy density (≈400 W h kg −1 ), durable cycling life (≈5000 cycles) and mature Li-ion battery infrastructure. [15] Moreover, wearable fiber Li-ion batteries can be woven into textiles, offering a convenient way to power wearable electronics. [16][17][18] Nonetheless, the safety and environmental risks caused by the usage of flammable/ toxic organic electrolytes restrict the further advance of Li-ion batteries and make them unsatisfied to be integrated with wearable electronic devices in proximity to the human body. [15,19] Further efforts are highly demanded to explore alternative power systems with promising energy density, reliable discharge-charge characteristics, long operation life, and good safety.In recent years, metal-air batteries have received widespread attention because of their remarkable theoretical energy density, environmental-friendliness, low fuel cost, and superior safety. [20][21][22][23] In particular, their unique half-open systems can continuously utilize the oxygen from ambient air instead of storing gaseous oxygen in closed systems, thus the required mass and volume of the air electrode can be largely minimized, resulting in high theoretical energy densities. [24] Compared to the theoretical energy density of Li-ion batteries with a closed system (460 Wh kg −1 ), lithium-air (Li-air) batteries exhibit much higher theoretical energy density (≈3500 W h kg −1 , based on the discharge product of Li 2 O 2 ). [25,26] Flexible wearable metal-air batteries, combining the flexible deformation feature and the high theoretical energy density, have become attractive energy supply systems for wearable electronic devices. Since 2015, wearable metal-air batteries (i.e., zinc-air (Zn-air), Li-air, aluminum-air (Al-air), sodium-air (Na-air), potassium-air (K-air), With the increasing popularity of personal wearable electronic devices used for healthcare, entertainment, and sports applications, the corresponding energy supply and space adaptability of devices are required to meet higher standards. Owing to large energy densities and intrinsic safety, wearable aqueous metal-air batteries have shown great potential to be energy storage/ conversion integrated systems for wearable electronic devices characterized by long-term low-power operation. In contrast to non-aqueous electrolytes, aqueous-based electrolytes exhibit greater ionic conductivity, higher operational safety, lower cost, and super...

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Section: Flexible Air Cathodes Prepared By An In Situ Fabrication Met...mentioning

confidence: 99%

Section: Components Of Wearable Aqueous Metal‐air Batteriesmentioning

confidence: 99%

Recent Advances in Wearable Aqueous Metal‐Air Batteries: From Configuration Design to Materials Fabrication

Chen

Fang

2023

Adv Materials Technologies

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“…Additionally, promoting self-powered electronics presents a potential solution for alleviating energy supply burdens and facilitating sustainable development pathways. The self-powering mechanisms commonly employed for wearable sensors by energy harvesting can be categorized as triboelectric, piezoelectric, thermoelectric and pyroelectric, where piezoelectric nanogenerators (PENG) haven shown great potential and ability to respond to tactile stimuli with high mechanical-to-electrical conversion efficiency as a result of their stable responsiveness [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A Self-Powered Piezoelectric Nanofibrous Membrane as Wearable Tactile Sensor for Human Body Motion Monitoring and Recognition

Yin

Wee

et al. 2023

Adv. Fiber Mater.

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Wearable sensors have drawn vast interest for their convenience to be worn on body to monitor and track body movements or exercise activities in real time. However, wearable electronics rely on powering systems to function. Herein, a self-powered, porous, flexible, hydrophobic and breathable nanofibrous membrane based on electrospun polyvinylidene fluoride (PVDF) nanofiber has been developed as a tactile sensor with low-cost and simple fabrication for human body motion detection and recognition. Specifically, effects of multi-walled carbon nanotubes (CNT) and barium titanate (BTO) as additives to the fiber morphology as well as mechanical and dielectric properties of the piezoelectric nanofiber membrane were investigated. The fabricated BTO@PVDF piezoelectric nanogenerator (PENG) exhibits the high β-phase content and best overall electrical performances, thus selected for the flexible sensing device assembly. Meanwhile, the nanofibrous membrane demonstrated robust tactile sensing performance that the device exhibits durability over 12,000 loading test cycles, holds a fast response time of 82.7 ms, responds to a wide pressure range of 0–5 bar and shows a high relative sensitivity, especially in the small force range of 11.6 V/bar upon pressure applied perpendicular to the surface. Furthermore, when attached on human body, its unique fibrous and flexible structure offers the tactile sensor to present as a health care monitor in a self-powered manner by translating motions of different movements to electrical signals with various patterns or sequences. Graphical Abstract Supplementary Information The online version contains supplementary material available at 10.1007/s42765-023-00282-8.

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“…Fiber-shaped sensors exhibit good flexibility and lightness, and they can also be woven into breathable fabrics, making them an ideal choice for wearable devices in the future. − So far, the dual-mode fiber strain sensors based on photonic crystal have been reported by using hydrogels . Although hydrogels have advantages in biocompatibility, adhesiveness, aqueous environment, wet state, and softness in contact with soft tissues, their long-term use is limited due to low environmental stability caused by water evaporation. , For fiber-shaped wearable devices, having durable and stable optical/electrical properties is crucial for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Dual-Mode Fiber Strain Sensor Based on Mechanochromic Photonic Crystal and Transparent Conductive Elastomer for Human Motion Detection

Zhao

et al. 2023

ACS Appl. Mater. Interfaces

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As an important component of wearable and stretchable strain sensors, dual-mode strain sensors can respond to deformation via optical/electrical dual-signal changes, which have important applications in human motion monitoring. However, realizing a fiber-shaped dual-mode strain sensor that can work stably in real life remains a challenge. Here, we design an interactive dual-mode fiber strain sensor with both mechanochromic and mechanoelectrical functions that can be applied to a variety of different environments. The dual-mode fiber is produced by coating a transparent elastic conductive layer onto photonic fiber composed of silica particles and elastic rubber. The sensor has visualized dynamic color change, a large strain range (0−80%), and a high sensitivity (1.90). Compared to other dual-mode strain sensors based on the photonic elastomer, our sensor exhibits a significant advantage in strain range. Most importantly, it can achieve reversible and stable optical/electrical dual-signal outputs in response to strain under various environmental conditions. As a wearable portable device, the dual-mode fiber strain sensor can be used for real-time monitoring of human motion, realizing the direct interaction between users and devices, and is expected to be used in fields such as smart wearable, human−machine interactions, and health monitoring.

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Advanced Fiber Materials for Wearable Electronics

Cited by 142 publications

References 155 publications

Recent Advances in Wearable Aqueous Metal‐Air Batteries: From Configuration Design to Materials Fabrication

Recent Advances in Wearable Aqueous Metal‐Air Batteries: From Configuration Design to Materials Fabrication

A Self-Powered Piezoelectric Nanofibrous Membrane as Wearable Tactile Sensor for Human Body Motion Monitoring and Recognition

Dual-Mode Fiber Strain Sensor Based on Mechanochromic Photonic Crystal and Transparent Conductive Elastomer for Human Motion Detection

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