Open AccessStretchable Sweat‐Activated Battery in Skin‐Integrated Electronics for Continuous Wireless Sweat Monitoring
Author(s) -
Liu Yiming,
Huang Xingcan,
Zhou Jingkun,
Yiu Chun Ki,
Song Zhen,
Huang Wei,
Nejad Sina Khazaee,
Li Hu,
Wong Tsz Hung,
Yao Kuanming,
Zhao Ling,
Yoo Woojung,
Park Wooyoung,
Li Jiyu,
Huang Ya,
Lam Hiuwai Raymond,
Song Enming,
Guo Xu,
Wang Yanwei,
Dai Zhenxue,
Chang Lingqian,
Li Wen Jung,
Xie Zhaoqian,
Yu Xinge
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202104635
Subject(s) - electronics , wearable computer , wearable technology , smartwatch , bluetooth , wireless , computer science , embedded system , electrical engineering , engineering , telecommunications
Wearable electronics have attracted extensive attentions over the past few years for their potential applications in health monitoring based on continuous data collection and real‐time wireless transmission, which highlights the importance of portable powering technologies. Batteries are the most used power source for wearable electronics, but unfortunately, they consist of hazardous materials and are bulky, which limit their incorporation into the state‐of‐art skin‐integrated electronics. Sweat‐activated biocompatible batteries offer a new powering strategy for skin‐like electronics. However, the capacity of the reported sweat‐activated batteries (SABs) cannot support real‐time data collection and wireless transmission. Focused on this issue, soft, biocompatible, SABs are developed that can be directly integrated on skin with a record high capacity of 42.5 mAh and power density of 7.46 mW cm −2 among the wearable sweat and body fluids activated batteries. The high performance SABs enable powering electronic devices for a long‐term duration, for instance, continuously lighting 120 lighting emitting diodes (LEDs) for over 5 h, and also offers the capability of powering Bluetooth wireless operation for real‐time recording of physiological signals for over 6 h. Demonstrations of the SABs for powering microfluidic system based sweat sensors are realized in this work, allowing real‐time monitoring of pH, glucose, and Na + in sweat.