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Optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells

The thermally driven electrochemical cells (TECs) convert the applied temperature gradient (ΔT) across electrodes, in redox-based electrolytes, into electricity. We, in this report, amplify the power generation characteristics of TEC, maintained at the ΔT of 45 K, by controlling the physical and ele...

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Main Authors: Hasan, S.W., Said, S.M., Bakar, A.S.A., Sabri, M.F.M., Sajid, I.H., Hashim, N.A.
Format: Article
Published: Kluwer (now part of Springer) 2017
Subjects:
QC Physics
TJ Mechanical engineering and machinery
TK Electrical engineering. Electronics Nuclear engineering
TP Chemical technology
Online Access:http://eprints.um.edu.my/17620/
http://dx.doi.org/10.1007/s10853-017-1190-7
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spelling my.um.eprints.176202017-08-04T02:58:38Z http://eprints.um.edu.my/17620/ Optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells Hasan, S.W. Said, S.M. Bakar, A.S.A. Sabri, M.F.M. Sajid, I.H. Hashim, N.A. QC Physics TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering TP Chemical technology The thermally driven electrochemical cells (TECs) convert the applied temperature gradient (ΔT) across electrodes, in redox-based electrolytes, into electricity. We, in this report, amplify the power generation characteristics of TEC, maintained at the ΔT of 45 K, by controlling the physical and electrical nature of the polymer membrane. The conductive membrane is prepared by trapping the solution of iodide/triiodide (I−/I3 −) and 1-butyl-3-methylimidazolium tetrafluoroborate [C4mim][BF4] in the mesoporous structure of poly(vinylidene fluoride) membranes. We identify the intricate dependence of TEC performance on numerous thermophysical and electrical properties including thermal conductance, porosity, thickness and ionic resistance of the membrane. Higher thickness provides better thermal resistivity maintaining the TEC at high ΔT; however, this simultaneously reduces the porosity (limiting the redox reactions at the electrodes) and augmenting the membrane resistance. Therefore, a compromise between high thermal gradient and availability of redox species at electrodes improves the maximum power density from 1.5 to 16.3 mW m−2. Kluwer (now part of Springer) 2017 Article PeerReviewed Hasan, S.W. and Said, S.M. and Bakar, A.S.A. and Sabri, M.F.M. and Sajid, I.H. and Hashim, N.A. (2017) Optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells. Journal of Materials Science, 52 (17). pp. 10353-10363. ISSN 0022-2461 http://dx.doi.org/10.1007/s10853-017-1190-7 doi:10.1007/s10853-017-1190-7
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QC Physics
TJ Mechanical engineering and machinery
TK Electrical engineering. Electronics Nuclear engineering
TP Chemical technology
spellingShingle QC Physics
TJ Mechanical engineering and machinery
TK Electrical engineering. Electronics Nuclear engineering
TP Chemical technology
Hasan, S.W.
Said, S.M.
Bakar, A.S.A.
Sabri, M.F.M.
Sajid, I.H.
Hashim, N.A.
Optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells
description The thermally driven electrochemical cells (TECs) convert the applied temperature gradient (ΔT) across electrodes, in redox-based electrolytes, into electricity. We, in this report, amplify the power generation characteristics of TEC, maintained at the ΔT of 45 K, by controlling the physical and electrical nature of the polymer membrane. The conductive membrane is prepared by trapping the solution of iodide/triiodide (I−/I3 −) and 1-butyl-3-methylimidazolium tetrafluoroborate [C4mim][BF4] in the mesoporous structure of poly(vinylidene fluoride) membranes. We identify the intricate dependence of TEC performance on numerous thermophysical and electrical properties including thermal conductance, porosity, thickness and ionic resistance of the membrane. Higher thickness provides better thermal resistivity maintaining the TEC at high ΔT; however, this simultaneously reduces the porosity (limiting the redox reactions at the electrodes) and augmenting the membrane resistance. Therefore, a compromise between high thermal gradient and availability of redox species at electrodes improves the maximum power density from 1.5 to 16.3 mW m−2.
format Article
author Hasan, S.W.
Said, S.M.
Bakar, A.S.A.
Sabri, M.F.M.
Sajid, I.H.
Hashim, N.A.
author_facet Hasan, S.W.
Said, S.M.
Bakar, A.S.A.
Sabri, M.F.M.
Sajid, I.H.
Hashim, N.A.
author_sort Hasan, S.W.
title Optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells
title_short Optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells
title_full Optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells
title_fullStr Optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells
title_full_unstemmed Optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells
title_sort optimization of poly(vinylidene fluoride) membranes for enhanced power density of thermally driven electrochemical cells
publisher Kluwer (now part of Springer)
publishDate 2017
url http://eprints.um.edu.my/17620/
http://dx.doi.org/10.1007/s10853-017-1190-7
_version_ 1643690470250905600
score 13.211869

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