High Thermopower of Agarose‐Based Ionic Thermoelectric Gel Through Micellization Effect Decoupling the Cation/Anion Thermodiffusion
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Advanced Battery Materials and Technologies · Advanced Thermoelectric Materials and Devices · Ionic liquids properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong 518055 P. R. China
Department of Mechanical Engineering The University of Hong Kong Pokfulam Road Hong Kong 999077 P. R. China
Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices Southern University of Science and Technology Shenzhen 518055 China
Department of Advanced Design and Systems Engineering City University of Hong Kong Kowloon Hong Kong 999077 P. R. China
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