期刊
NANO ENERGY
卷 41, 期 -, 页码 261-268出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.08.060
关键词
Energy storage; Micro-supercapacitors; Flexible electronics; Wearable electronics
类别
资金
- National Natural Science Foundation [61625404, 21571080, 51672308, 61504136]
- Beijing Natural Science Foundation [4162062]
- Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-JWC004]
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/cm(2) and provided a power density of 0.185 mW/cm(2) at an area energy density of 0.004 mWh/cm(2). 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.
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