Effect of clamping pressure on ohmic resistance and compression of gas diffusion layers for polymer electrolyte fuel cells

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Effect of clamping pressure on ohmic resistance and compression of gas diffusion layers for polymer electrolyte fuel cells. / Mason, Thomas J.; Millichamp, Jason; Neville, Tobias P.; El-Kharouf, Ahmad; Pollet, Bruno G.; Brett, Daniel J L.

In: Journal of Power Sources, Vol. 219, 01.12.2012, p. 52-59.

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Mason, Thomas J. ; Millichamp, Jason ; Neville, Tobias P. ; El-Kharouf, Ahmad ; Pollet, Bruno G. ; Brett, Daniel J L. / Effect of clamping pressure on ohmic resistance and compression of gas diffusion layers for polymer electrolyte fuel cells. In: Journal of Power Sources. 2012 ; Vol. 219. pp. 52-59.

Bibtex

@article{67153d2bfc4c4b2081e2263dece3bfe8,
title = "Effect of clamping pressure on ohmic resistance and compression of gas diffusion layers for polymer electrolyte fuel cells",
abstract = "This paper describes the use of an in situ analytical technique based on simultaneous displacement and resistance measurement of gas diffusion layers (GDLs) used in polymer electrolyte fuel cells (PEFCs), when exposed to varying compaction pressure. In terms of the losses within fuel cells, the ohmic loss makes up a significant portion. Of this loss, the contact resistance between the GDL and the bipolar plate (BPP) is an important constituent. By analysing the change in thickness and ohmic resistance of GDLs under compression, important mechanical and electrical properties are obtained. Derived parameters such as the 'displacement factor' are used to characterise a representative range of commercial GDLs. Increasing compaction pressure leads to a non-linear decrease in resistance for all GDLs. For Toray paper, compaction becomes more irreversible with pressure with no elastic region observed. Different GDLs have different intrinsic resistance; however, all GDLs of the same class share a common compaction profile (change in resistance with pressure). Cyclic compression of Toray GDL leads to progressive improvement in resistance and reduction in thickness that stabilises after ∼10 cycles.",
keywords = "Compression, Contact resistance, Displacement factor, GDL, PEFC",
author = "Mason, {Thomas J.} and Jason Millichamp and Neville, {Tobias P.} and Ahmad El-Kharouf and Pollet, {Bruno G.} and Brett, {Daniel J L}",
year = "2012",
month = dec,
day = "1",
doi = "10.1016/j.jpowsour.2012.07.021",
language = "English",
volume = "219",
pages = "52--59",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Effect of clamping pressure on ohmic resistance and compression of gas diffusion layers for polymer electrolyte fuel cells

AU - Mason, Thomas J.

AU - Millichamp, Jason

AU - Neville, Tobias P.

AU - El-Kharouf, Ahmad

AU - Pollet, Bruno G.

AU - Brett, Daniel J L

PY - 2012/12/1

Y1 - 2012/12/1

N2 - This paper describes the use of an in situ analytical technique based on simultaneous displacement and resistance measurement of gas diffusion layers (GDLs) used in polymer electrolyte fuel cells (PEFCs), when exposed to varying compaction pressure. In terms of the losses within fuel cells, the ohmic loss makes up a significant portion. Of this loss, the contact resistance between the GDL and the bipolar plate (BPP) is an important constituent. By analysing the change in thickness and ohmic resistance of GDLs under compression, important mechanical and electrical properties are obtained. Derived parameters such as the 'displacement factor' are used to characterise a representative range of commercial GDLs. Increasing compaction pressure leads to a non-linear decrease in resistance for all GDLs. For Toray paper, compaction becomes more irreversible with pressure with no elastic region observed. Different GDLs have different intrinsic resistance; however, all GDLs of the same class share a common compaction profile (change in resistance with pressure). Cyclic compression of Toray GDL leads to progressive improvement in resistance and reduction in thickness that stabilises after ∼10 cycles.

AB - This paper describes the use of an in situ analytical technique based on simultaneous displacement and resistance measurement of gas diffusion layers (GDLs) used in polymer electrolyte fuel cells (PEFCs), when exposed to varying compaction pressure. In terms of the losses within fuel cells, the ohmic loss makes up a significant portion. Of this loss, the contact resistance between the GDL and the bipolar plate (BPP) is an important constituent. By analysing the change in thickness and ohmic resistance of GDLs under compression, important mechanical and electrical properties are obtained. Derived parameters such as the 'displacement factor' are used to characterise a representative range of commercial GDLs. Increasing compaction pressure leads to a non-linear decrease in resistance for all GDLs. For Toray paper, compaction becomes more irreversible with pressure with no elastic region observed. Different GDLs have different intrinsic resistance; however, all GDLs of the same class share a common compaction profile (change in resistance with pressure). Cyclic compression of Toray GDL leads to progressive improvement in resistance and reduction in thickness that stabilises after ∼10 cycles.

KW - Compression

KW - Contact resistance

KW - Displacement factor

KW - GDL

KW - PEFC

UR - http://www.scopus.com/inward/record.url?scp=84864414091&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2012.07.021

DO - 10.1016/j.jpowsour.2012.07.021

M3 - Article

AN - SCOPUS:84864414091

VL - 219

SP - 52

EP - 59

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

ER -