Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 16, Issue 2, Pages 129-141Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.202001331
Keywords
Ionic Thermoelectric; Seebeck coefficient; Soret effect; Electrolyte solution; Ionic liquid
Categories
Funding
- National Natural Science Foundation of China [21825503, 21674127]
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Ionic thermoelectric materials represent a new paradigm for harvesting low-grade heat with higher Seebeck coefficient and lower thermal conductivity, and possess advantages of high flexibility, low cost, limited environmental pollution, and self-healing capability. They have been applied in supercapacitors, wearable devices, and fire warning systems, showing great potential for future development.
Thermoelectric materials represent a new paradigm for harvesting low-grade heat, which would otherwise be dissipated to the environment uselessly. Relative to conventional thermoelectric materials generally composed of semiconductors or semi-metals, ionic thermoelectric materials are rising as an alternative choice which exhibit higher Seebeck coefficient and lower thermal conductivity. The ionic thermoelectric materials own a completely different thermoelectric conversion mechanism, in which the ions do not enter the electrode but rearrange on the electrode surface to generate a voltage difference between the hot and cold electrodes. This unique character has inspired worldwide interests on the design of ionic-type thermoelectric converters with attractive advantages of high flexibility, low cost, limited environmental pollution, and self-healing capability. Referring to the categories of ionic thermoelectric conversion, some representative ionic thermoelectric materials with their respective characteristics are summarized in this minireview. In addition, examples of applying ionic thermoelectric materials in supercapacitors, wearable devices, and fire warning system are also discussed. Insight into the challenges for the further development of ionic thermoelectric materials is finally provided.
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