Moisture-Driven Power Generation for Multifunctional Flexible Sensing Systems

被引:131
作者
Li, Lianhui [1 ]
Chen, Zhigang [1 ]
Hao, Mingming [1 ]
Wang, Shuqi [1 ]
Sun, Fuqin [1 ]
Zhao, Zhigang [1 ]
Zhang, Ting [1 ]
机构
[1] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion SINANO, Lab Multifunct Nanomat & Smart Syst, I Lab, 398 Ruoshui Rd, Suzhou 215123, Peoples R China
基金
中国国家自然科学基金;
关键词
Moisture-driven; power generation; multifunctional; flexible sensing system; wearable electronics; GRAPHENE OXIDE; ELECTRICITY; FIBER; SKIN;
D O I
10.1021/acs.nanolett.9b02081
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Flexible self-powered multifunctional sensing systems provide a promising direction for the development of wearable electronics. Although increased efforts have been devoted to developing self-powered integrated devices, the development of flexible and adaptable sensing systems with miniaturized stable power supplies is highly desirable yet greatly challenging. Herein, an ambient moisture-induced self-powered wearable sensing system was fabricated by integrating a porous polydopamine layer with a hydroxy group gradient (called g-PDA) based moisture-enabled power generator and a flexible pressure sensor. Due to the large amount of gradient-distributed free cations (H+) and locally confined anions produced in wide electrode spaces during hydration of the thin porous g-PDA film, the moisture-induced potential and effective output power density of the g-PDA-based power generator rapidly reaches up to 0.52 V and 0.246 mW cm(-2), respectively. Importantly, the voltage output within 120 s only has 6% change, and a continuously open-circuit voltage can be maintained after 1900 s of attenuation, which is a breakthrough for the duration of humidity generation. Finally, a self-powered wearable multifunctional sensing system has been demonstrated to be able to provide real-time monitoring of human physiological signals, without an external power supply, which opens new opportunities for future self-powered multifunctional sensing systems.
引用
收藏
页码:5544 / 5552
页数:9
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