TY - JOUR
T1 - High Thermopower of Agarose-Based Ionic Thermoelectric Gel Through Micellization Effect Decoupling the Cation/Anion Thermodiffusion
AU - Li, Qikai
AU - Yu, Dangkai
AU - Wang, Shuaihua
AU - Zhang, Xinbo
AU - Li, Yuchen
AU - Feng, Shien-Ping
AU - Liu, Weishu
PY - 2023/12/1
Y1 - 2023/12/1
N2 - 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.
AB - 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.
KW - agarose
KW - decoupling effects
KW - Ionic thermoelectric gels
KW - micellization
KW - thermodiffusion
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85165247844&origin=recordpage
U2 - 10.1002/adfm.202305835
DO - 10.1002/adfm.202305835
M3 - RGC 21 - Publication in refereed journal
SN - 1616-301X
VL - 33
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 49
M1 - 2305835
ER -