All VN-graphene architecture derived self-powered wearable sensors for ultrasensitive health monitoring
VN-graphene architecture, solid-state supercapacitor, pressure sensor, self-powered wearable sensor, health monitoring
The booming of wearable electronics has nourished the progress on developing multifunctional energy storage systems with versatile flexibility, which enable the continuous and steady power supply even under various deformed states. In this sense, the synergy of flexible energy and electronic devices to construct integrative wearable microsystems is meaningful but remains quite challenging by far. Herein, we devise an innovative supercapacitor/sensor integrative wearable device that is based upon our designed vanadium nitride-graphene (VN-G) architectures. Flexible quasi-solid-state VN-G supercapacitor with ultralight and binder-free features deliver a specific capacitance of ~ 53 F·g−1 with good cycle stability. On the other hand, VN-G derived pressure sensors fabricated throughout a spray-printing process also manifest favorably high sensitivity (40 kPa−1 at the range of 2–10 kPa), fast response time (~ 130 ms), perfect skin conformability, and outstanding stability under static and dynamic pressure conditions. In turn, their complementary unity into a self-powered wearable sensor enables the precise detection of physiological motions ranging from pulse rate to phonetic recognition, holding promise for in-practical health monitoring applications.
Tsinghua University Press
Lianghao Yu,Yuyang Yi,Ting Yao,Yingze Song,Yiran Chen,Qiucheng Li,Zhou Xia,Nan Wei,Zhengnan Tian,Baoqing Nie,Li Zhang,Zhongfan Liu,Jingyu Sun, All VN-graphene architecture derived self-powered wearable sensors for ultrasensitive health monitoring. NanoRes.2019, 12(2): 331–338