Synthesis and structure modification of ionic liquids to optimize their thermoelectric properties

Pérez López, Pilar (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Uhl, Stefanie (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland) ; Laux, Edith (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland) ; Sanglard, Pauline (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Marti, Roger (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Keppner, Herbert (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland) ; Vanoli, Ennio (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland)

Ionic Liquids (IL) are organic salts with melting temperature typically below 100 °C. The unique properties of ionic liquids such as their excellent chemical and thermal stabilities, their low vapor pressure, their important ionic conductivity makes them interesting compounds in material science and especially in thermoelectric generators (TEGs) for medical, pharma, or electronic applications. A big advantage of ILs is the endless number of cation/anion combinations, which allows synthesizing task-specific ionic liquids for TEG applications. This paper describes the synthesis, physical and electrochemical characterization of novel IL for application in thermoelectric generators (TEGs). We discuss the optimization of the chemical structure of IL regarding their thermoelectric properties via a structure-activity relationship approach. The best ionic liquids are the protic ones with a Seebeck coefficient of 570.24 µV/K for methylammonium trifluoroacetate and -1424.56 µV/K for ethylammonium formate.


Note: Selection and/or Peer-review under responsibility of the Conference Committee Members of 14th EUROPEAN CONFERENCE ON THERMOELECTRICS


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HE-Arc Ingénierie
HEIA-FR
Institute:
ChemTech - Institut des technologies chimiques
Subject(s):
Ingénierie
Date:
2018
Pagination:
8 p.
Published in:
Materials today: proceedings
Numeration (vol. no.):
2018, 5, 1, pp. 10298-10305
DOI:
ISSN:
2214-7853
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2018-08-14, last modified 2019-03-19

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