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具有本征应变传感功能的MnO电沉积织物基可拉伸超级电容器

MnO-Electrodeposited Fabric-Based Stretchable Supercapacitors with Intrinsic Strain Sensing.

作者信息

Pullanchiyodan Abhilash, Manjakkal Libu, Ntagios Markellos, Dahiya Ravinder

机构信息

Bendable Electronics and Sensing Technologies (BEST) Group, School of Engineering, University of Glasgow, Glasgow G12 8QQ, U.K.

出版信息

ACS Appl Mater Interfaces. 2021 Oct 13;13(40):47581-47592. doi: 10.1021/acsami.1c12526. Epub 2021 Oct 1.

Abstract

The increasing number of devices needed by wearable systems to bring radical advances in healthcare, robotics, and human-machine interfaces is a threat to their growth if the integration and energy-related challenges are not managed. A natural solution is to reduce the number of devices while retaining the functionality or simply using multifunctional devices, as demonstrated here through a stretchable supercapacitor (SSC) with intrinsic strain sensing. The presented SSC was obtained by electrodeposition of nanoflower MnO on fabric (as a pseudocapacitive electrode) and three-dimensional conductive wrapping of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) to boost the performance. Among fabricated devices, the stretchable PEDOT:PSS/MnO/PEDOT:PSS supercapacitor (SPMP-SC) showed the best performance (specific capacitance of 580 mF·cm (108.1 F·g); energy density of 51.4 μWh·cm at 0.5 mA). The stretchability (0-100%; 1000 cycles) analysis of SPMP-SC with Ecoflex encapsulation showed high capacitance retention (>90% for 40% stretch). The intrinsic strain sensing of the SSC was confirmed by the linear variation of capacitance (sensitivity -0.4%) during stretching. Finally, as a proof-of-concept, the application of SSC with intrinsic sensing was demonstrated for health monitoring through volumetric expansion of a manikin during ventilator operation and in robotics and by measuring the joint angle of a robotic hand.

摘要

如果不能解决集成和能源相关的挑战,可穿戴系统为医疗保健、机器人技术和人机接口带来根本性进展所需的设备数量不断增加,将对其发展构成威胁。一个自然的解决方案是减少设备数量,同时保留功能,或者简单地使用多功能设备,本文通过具有本征应变传感功能的可拉伸超级电容器(SSC)进行了演示。所展示的SSC是通过在织物上电沉积纳米花MnO(作为赝电容电极)以及对聚(3,4-乙撑二氧噻吩):聚(苯乙烯磺酸盐)(PEDOT:PSS)进行三维导电包裹来提高性能而获得的。在制造的器件中,可拉伸的PEDOT:PSS/MnO/PEDOT:PSS超级电容器(SPMP-SC)表现出最佳性能(比电容为580 mF·cm(108.1 F·g);在0.5 mA时能量密度为51.4 μWh·cm)。对采用Ecoflex封装的SPMP-SC进行的拉伸性(0-100%;1000次循环)分析表明,其电容保持率很高(40%拉伸时>90%)。SSC的本征应变传感通过拉伸过程中电容的线性变化(灵敏度-0.4%)得到证实。最后,作为概念验证,展示了具有本征传感功能的SSC在健康监测中的应用,包括通过人体模型在呼吸机操作过程中的体积膨胀以及在机器人技术中进行健康监测,还通过测量机器人手的关节角度进行了演示。

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