Chaotropic Effect-Boosted Thermogalvanic Ionogel Thermocells for All-Weather Power Generation.
basic_science · Level V
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- Record sourced from PubMed, PMID 38193634.
- Also identified by DOI 10.1002/adma.202312249.
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Abstract
Ionic thermocells convert heat into electricity and are promising power sources for electronic devices. However, discontinuous and small electricity output limits practical use under varying environmental conditions. Here, a thermogalvanic ionogel with a high Seebeck coefficient (32.4 mV K<sup>-1</sup>) is designed. Thermocells that combine thermogalvanic ionogel-based thermocells, which realize all-weather power generation via passive radiative cooling, are also developed. These thermocells generate electricity continuously under varying weather conditions and over a wide temperature range (-40 to 90 °C), with a normalized power density of 25.84 mW m<sup>-2</sup> K<sup>-2</sup>. Advanced characterization shows that the chaotropic effect enhances the Seebeck coefficient, while the self-supplying temperature difference given the radiative cooling structure enables all-weather power generation. These results provide an effective strategy for developing practical thermocells suitable for diverse daily and seasonal variations.