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- Title
3D Printed Gelatin Methacrylate Hydrogel‐Based Wearable Thermoelectric Generators.
- Authors
Hsu, Ching‐Chieh; Lin, Yen‐Ting; Hong, Shao‐Huan; Jeng, U‐Ser; Chen, Hsin‐Lung; Yu, Jiashing; Liu, Cheng‐Liang
- Abstract
The present study focuses on the utilization of a hydrogel consisting of gelatin methacrylate (GelMA) and polyvinyl alcohol (PVA) as a matrix for hosting the redox couple Fe(CN)63−/4−. The hydrogel exhibits a discernable thermopower (Src) of 3 mV K−1. The beneficial effect of the hydrogel microstructure on the mechanical robustness is demonstrated by small‐angle X‐ray scattering (SAXS). Moreover, the hydrogel is used to construct a 3D printed thermoelectric generator (TEG) consisting of eight p‐type thermoelectric legs, which exhibits commendable thermoelectric properties, including an open‐circuit voltage of 64 mV and a power density of 4.0 mW m−2 under a temperature gradient (ΔT) of 2.5 K. These findings demonstrate that 3D printing both enhances the quality of the interface between the hydrogel and electrode and provides a promising method for a more facile TEG fabrication process with the potential for further applications in low‐grade waste heat harvesting.
- Subjects
THERMOELECTRIC materials; POLYVINYL alcohol; THREE-dimensional printing; POWER density; THERMOELECTRIC power; THERMOELECTRIC generators
- Publication
Advanced Sustainable Systems, 2024, Vol 8, Issue 8, p1
- ISSN
2366-7486
- Publication type
Article
- DOI
10.1002/adsu.202400039