Journal
NPJ FLEXIBLE ELECTRONICS
Volume 6, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41528-022-00144-0
Keywords
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Funding
- City University of Hong Kong [9667199, 9667221, 9680322]
- Research Grants Council of the Hong Kong Special Administrative Region [21210820, 11213721]
- Shenzhen Science and Technology Innovation Commission [JCYJ20200109110201713]
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This article introduces an ultra-thin, flexible, garment-based microelectronics system powered by sweat-activated batteries. It can continuously power biosensors and microelectronic systems for real-time sweat monitoring. The system has good electricity output, high biocompatibility, and potential for solving power issues in flexible wearable electronics.
Thin, soft, and skin-integrated electronic system has great advantages for realizing continuous human healthcare monitoring. Here, we report an ultra-thin, flexible, and garment-based microelectronics powered by sweat-activated batteries (SABs) and applications of powering biosensors and microelectronic systems for real time sweat monitoring. The SAB cell is ultra-thin (1.25 mm) with excellent biocompatibility. The SAB has good electricity output with high capacity (14.33 mAh) and maximum power density (3.17 mW cm(-2)) after being activated by the sweat volume of 0.045 mL cm(-2), which could continuously power 120 light emitting diodes over 3 h. The outputs could maintain stable after repeatable bending. Wireless microelectronics system could be continuously powered by the SABs for 3 h to monitor sweat and physiological information, including sweat Na+ concentration, pH, and skin impedance. The reported integrated system provides a potential for solving the power issues of flexible wearable electronics and realizing personalized medicine.
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