Recurrently gellable and thermochromic inorganic hydrogel thermogalvanic cells.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39058781.
- Also identified by DOI 10.1126/sciadv.adp4533 and PMC identifier 11277356.
- Licence recorded as CC BY-NC.
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Abstract
Thermogalvanic cells (TGCs) draw great attention in the field of heat to electricity conversion, but TGCs were only in the form of liquid or organic gel. Here, we report an all-inorganic hydrogel TGC via simply mixing and stirring two inorganic salt solutions. Benefiting from the hydrogen bonds resultant framework and endogenous Fe<sup>2+/3+</sup> redox couple, the TGC can recurrently pulverize-gel with completely holding its initial thermogalvanic performances after even 60 cycles. As the temperature and pH coregulating Fe<sup>3+</sup> concentration and reversible transformation between Fe<sup>3+</sup> and Fe(OH)<sub>3</sub>, we boost thermopower and realize thermochromism. This work provides a different perspective for TGCs and offers an avenue for future hydrogel materials research.