3 years ago

Highly Compressible Integrated Supercapacitor–Piezoresistance-Sensor System with CNT–PDMS Sponge for Health Monitoring

Highly Compressible Integrated Supercapacitor–Piezoresistance-Sensor System with CNT–PDMS Sponge for Health Monitoring
Liming Miao, Zongming Su, Jinxin Zhang, Xuexian Chen, Xiaoliang Cheng, Yu Song, Haotian Chen, Haixia Zhang
Rapid improvement of wearable electronics stimulates the demands for the matched functional devices and energy storage devices. Meanwhile, wearable microsystem requires every parts possessing high compressibility to accommodate large-scale mechanical deformations and complex conditions. In this work, a general carbon nanotube–polydimethylsiloxane (CNT–PDMS) sponge electrode is fabricated as the elementary component of the compressible system. CNT–PDMS sponge performs high sensitivity as a piezoresistance sensor, which is capable of detecting stress repeatedly and owns great electrochemical performance as a compressible supercapacitor which maintains stably under compressive strains, respectively. Assembled with the piezoresistance sensor and the compressible supercapacitor, such highly compressible integrated system can power and modulate the low-power electronic devices reliably. More importantly, attached to the epidermal skin or clothes, it can detect human motions, ranging from speech recognition to breathing record, thus showing feasibility in real-time health monitor and human–machine interfaces. An integrated compressible supercapacitor–piezoresistance-sensor system is developed with a general carbon nanotube–polydimethylsiloxane sponge, which exhibits high piezoresistance sensitivity and stable electrochemical performance. This self-driving system can be attached to epidermal skin and perform reliably in distinguishing human's physiological motions, such as speech recognition, motion state, and breathing monitoring, thus showing potential applications in real-time wearable healthcare monitor and human–machine interfaces.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/smll.201702091

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