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- Title
Self-Powered, Non-Toxic, Recyclable Thermogalvanic Hydrogel Sensor for Temperature Monitoring of Edibles.
- Authors
Yang, Kun; Bai, Chenhui; Liu, Boyuan; Liu, Zhoutong; Cui, Xiaojing
- Abstract
Thermogalvanic hydrogel, an environmentally friendly power source, enable the conversion of low-grade thermal energy to electrical energy and powers microelectronic devices in a variety of scenarios without the need for additional batteries. Its toxicity, mechanical fragility and low output performance are a hindrance to its wide application. Here, we demonstrate thermoelectric gels with safe non-toxic, recyclable, highly transparent and flexible stretchable properties by introducing gelatin as a polymer network and SO 3 / 4 2 − as a redox electric pair. When the temperature difference is 10 K, the gel-based thermogalvanic cell achieves an open-circuit voltage of about 16.2 mV with a maximum short-circuit current of 39 μ A. Furthermore, we extended the application of the Gel-SO 3 / 4 2 − gel to monitor the temperature of hot or cold food, enabling self-powered sensing for food temperature detection. This research provides a novel concept for harvesting low-grade thermal energy and achieving safe and harmless self-driven temperature monitoring.
- Subjects
TEMPERATURE sensors; ELECTRICAL energy; OPEN-circuit voltage; SHORT-circuit currents; POLYMER networks; BLOOD sugar monitoring; COLD (Temperature); POLYMER colloids
- Publication
Micromachines, 2023, Vol 14, Issue 7, p1327
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi14071327