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High thermal gradient in thermo-electrochemical cells by insertion of a poly(vinylidene fluoride) membrane

Hasan, Syed Waqar, Said, Suhana Mohd, Sabri, Mohd Faizul Mohd, Bakar, Ahmad Shuhaimi Abu, Hashim, Nur Awanis, Hasnan, Megat Muhammad Ikhsan Megat, Pringle, Jenny and MacFarlane, Douglas R 2016, High thermal gradient in thermo-electrochemical cells by insertion of a poly(vinylidene fluoride) membrane, Scientific reports, vol. 6, pp. 1-11, doi: 10.1038/srep29328.

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Title High thermal gradient in thermo-electrochemical cells by insertion of a poly(vinylidene fluoride) membrane
Author(s) Hasan, Syed Waqar
Said, Suhana Mohd
Sabri, Mohd Faizul Mohd
Bakar, Ahmad Shuhaimi Abu
Hashim, Nur Awanis
Hasnan, Megat Muhammad Ikhsan Megat
Pringle, Jenny
MacFarlane, Douglas R
Journal name Scientific reports
Volume number 6
Start page 1
End page 11
Total pages 11
Publisher Nature Publishing Group
Place of publication London, Eng.
Publication date 2016-07-06
ISSN 2045-2322
Summary Thermo-Electrochemical cells (Thermocells/TECs) transform thermal energy into electricity by means of electrochemical potential disequilibrium between electrodes induced by a temperature gradient (ΔT). Heat conduction across the terminals of the cell is one of the primary reasons for device inefficiency. Herein, we embed Poly(Vinylidene Fluoride) (PVDF) membrane in thermocells to mitigate the heat transfer effects - we refer to these membrane-thermocells as MTECs. At a ΔT of 12 K, an improvement in the open circuit voltage (Voc) of the TEC from 1.3 mV to 2.8 mV is obtained by employment of the membrane. The PVDF membrane is employed at three different locations between the electrodes i.e. x = 2 mm, 5 mm, and 8 mm where 'x' defines the distance between the cathode and PVDF membrane. We found that the membrane position at x = 5 mm achieves the closest internal ΔT (i.e. 8.8 K) to the externally applied ΔT of 10 K and corresponding power density is 254 nWcm-2; 78% higher than the conventional TEC. Finally, a thermal resistivity model based on infrared thermography explains mass and heat transfer within the thermocells.
Language eng
DOI 10.1038/srep29328
Field of Research 030604 Electrochemistry
030304 Physical Chemistry of Materials
091205 Functional Materials
Socio Economic Objective 970102 Expanding Knowledge in the Physical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Nature Publishing Group
Persistent URL http://hdl.handle.net/10536/DRO/DU:30085878

Document type: Journal Article
Collection: Institute for Frontier Materials
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