High Thermopower of Agarose-Based Ionic Thermoelectric Gel Through Micellization Effect Decoupling the Cation/Anion Thermodiffusion

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Qikai Li
  • Dangkai Yu
  • Shuaihua Wang
  • Xinbo Zhang
  • Yuchen Li
  • Weishu Liu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number2305835
Journal / PublicationAdvanced Functional Materials
Volume33
Issue number49
Online published20 Jul 2023
Publication statusPublished - 1 Dec 2023

Abstract

Ionic thermoelectric (i-TE) gels can have a high thermopower, if the thermodiffusion of mobile cation/anion is decoupled, attracting increasing attentions. Herein, it is shown a high p-type i-TE thermopower of 41.8 mV K−1 in agarose-based ionic thermoelectric gels of AG-x Na:DBS (AG: agarose, Na:DBS: sodium dodecyl benzene sulfonate). The exclusively high thermopower is relative to the successfully decoupling the thermodiffusion of cation Na+ and anion DBS. A unique porous structure is formed due to the micellization of the amphiphilic DBS with the hydrophilic benzenesulfonic group attached to the hydrous agarose gel chains, while the hydrophobic alkyl chain point to the pore centers. As a result, the DBS micelles are almost immobile as compared with Na+, which can be reconsidered as a part of the gel matrix. The work shines a light on decoupling of cation/anion thermodiffusion through tailoring the microstructure of the quasi-solid i-TE materials. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • agarose, decoupling effects, Ionic thermoelectric gels, micellization, thermodiffusion

Citation Format(s)