Tang Q.Yeh M.-H.Liu G.Li S.Chen J.Bai Y.Feng L.Lai M.Ho K.-C.Guo H.Hu C.2019-05-172019-05-17201822112855https://scholars.lib.ntu.edu.tw/handle/123456789/408689With lightweight, high energy conversion and low cost, the triboelectric nanogenerators (TENGs) have presented its tremendous potential as a portable sustainable power source to small-scale portable/wearable electronic device. However, the insufficient output power of TENG is a bottleneck for its practical applications. Here, we report an ultrahigh output power, a whirligig-inspired TENG (Wi-TENG) designed according to an antiqueue whirligig toy that is capable of converting low-frequency pulling motion into a high-frequency rotation. It shows that the rotor in the Wi-TENG achieves a maximum speed of 11,250 rpm. Ultrahigh charge transfer quantity of ~ 310 £gC and output power of 40.18 mW are obtained by per pulling of Wi-TENG. Moreover, a maximum short-circuit current of 317 £gA and a constant open-circuit voltage peak value of 153 V can be generated by the Wi-TENG, which can rapidly charge a commercial capacitance (100 £gF) to ~14 V within 10 s. After power management, this Wi-TENG is successfully demonstrated as a portable sustainable power source for driving a commercial blood glucose meter or a temperature-humidity sensor. This study presents the potential of Wi-TENG as a reliable portable instant power supply for personal health monitoring devices. ? 2018 Elsevier LtdMedical monitoring systemsPortableTriboelectric nanogeneratorWhirligig[SDGs]SDG7journal article10.1016/j.nanoen.2018.02.0392-s2.0-85042673301https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042673301&doi=10.1016%2fj.nanoen.2018.02.039&partnerID=40&md5=ad8dda38f52638242c37e37f26ad7a3e