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Flexible planar concentric circular micro-supercapacitor arrays for wearable gas sensing application
Nano Energy ( IF 17.6 ) Pub Date : 2017-09-12 , DOI: 10.1016/j.nanoen.2017.08.060
La Li , Chengwei Fu , Zheng Lou , Shuai Chen , Wei Han , Kai Jiang , Di Chen , Guozhen Shen

Micro-supercapacitor (MSC) are considered to be a promising candidate for wearable energy storage due to their scale down in dimensions to fit on-chip geometries of integrated nanosystem, high charge/discharge efficiency, long lifetimes and strong security compared to Li-ion batteries. In this work, we present a polypyrrole (Ppy) film based MSC arrays by combining photolithograph and electrodepositon method. The designed MSC with concentric circles structure exhibited a large areal capacitance of 47.42 mF/cm2 and provided a power density of 0.185 mW/cm2 at an area energy density of 0.004 mWh/cm2. MSC arrays connected in series were utilized as power source to drive a wearable gas sensor on the same flexible substrate. As-designed wearable self-driven room temperature ethanol gas sensor showed a quick response time (13 s) and recovery time (4.5 s), good selectivity to ethanol and a high detection capability of less than 1 ppm at room temperature, proving the feasibility of the wearable MSC arrays integrated gas sensing system and offering a quick, easy and comfortable way for personalized monitoring drunken driving.



中文翻译:

适用于可穿戴气体传感应用的柔性平面同心圆形微型超级电容器阵列

与锂离子电池相比,微型超级电容器(MSC)的尺寸缩小以适合集成纳米系统的片上几何形状,具有高充电/放电效率,长寿命和强大的安全性,因此被认为是可穿戴式能量存储的有前途的候选者电池。在这项工作中,我们结合光刻和电沉积方法,提出了一种基于聚吡咯(Ppy)膜的MSC阵列。设计的具有同心圆结构的MSC表现出47.42 mF / cm 2的大面积电容,并在0.004 mWh / cm 2的面积能量密度下提供了0.185 mW / cm 2的功率密度。。串联连接的MSC阵列被用作电源来驱动同一柔性基板上的可穿戴式气体传感器。设计的可穿戴式自驱动室温乙醇气体传感器显示了快速的响应时间(13 s)和恢复时间(4.5 s),对乙醇的良好选择性以及在室温下不到1 ppm的高检测能力,证明了可行性的可穿戴式MSC阵列集成式气体传感系统,提供了一种快速,轻松和舒适的方式来个性化监控酒后驾驶。

更新日期:2017-09-12
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