Model-supported characterization of a PEM water electrolysis cell for the effect of compression

Research output: Contribution to journalJournal articleResearchpeer-review

11 Citations (Scopus)
384 Downloads (Pure)

Abstract

This paper investigates the influence of the cell compression of a PEM water electrolysis cell. A small single cell is therefore electrochemically analyzed by means of polarization behavior and impedance spectroscopy throughout a range of currents (0.01 A cm−2 to 2.0 A cm−2) at two temperatures (60°C and 80°C) and eight compressions (0.77 MPa–3.45 MPa). Additionally, a computational model is utilized to support the analysis. The main findings are that cell compression has a positive effect on overall cell performance due to decreased contact resistances, but is subject to optimization. In this case, no signs of severe mass transport problems due to crushed transport layers are visible in either polarization curves or impedance plots, even at high currents. However, a Tafel plot analysis revealed more than one slope throughout the current range. The change in the Tafel slope is therefore discussed and connected to the electrochemical reaction or an ohmic contribution from a non-electrode component.
Original languageEnglish
JournalElectrochimica Acta
Volume263
Pages (from-to)228-236
Number of pages9
ISSN0013-4686
DOIs
Publication statusPublished - Feb 2018

Fingerprint

Electrolysis
Polarization
Water
Contact resistance
Mass transfer
Spectroscopy
Temperature

Keywords

  • PEM water electrolysis
  • Impedance spectroscopy
  • Contact resistance
  • Model validation
  • Clamping pressure

Cite this

@article{36eb5a2c15e44c7a976bee96901d90a8,
title = "Model-supported characterization of a PEM water electrolysis cell for the effect of compression",
abstract = "This paper investigates the influence of the cell compression of a PEM water electrolysis cell. A small single cell is therefore electrochemically analyzed by means of polarization behavior and impedance spectroscopy throughout a range of currents (0.01 A cm−2 to 2.0 A cm−2) at two temperatures (60°C and 80°C) and eight compressions (0.77 MPa–3.45 MPa). Additionally, a computational model is utilized to support the analysis. The main findings are that cell compression has a positive effect on overall cell performance due to decreased contact resistances, but is subject to optimization. In this case, no signs of severe mass transport problems due to crushed transport layers are visible in either polarization curves or impedance plots, even at high currents. However, a Tafel plot analysis revealed more than one slope throughout the current range. The change in the Tafel slope is therefore discussed and connected to the electrochemical reaction or an ohmic contribution from a non-electrode component.",
keywords = "PEM water electrolysis, Impedance spectroscopy, Contact resistance, Model validation, Clamping pressure",
author = "Frensch, {Steffen Henrik} and Olesen, {Anders Christian} and {Simon Araya}, Samuel and K{\ae}r, {S{\o}ren Knudsen}",
year = "2018",
month = "2",
doi = "10.1016/j.electacta.2018.01.040",
language = "English",
volume = "263",
pages = "228--236",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Pergamon Press",

}

Model-supported characterization of a PEM water electrolysis cell for the effect of compression. / Frensch, Steffen Henrik; Olesen, Anders Christian; Simon Araya, Samuel; Kær, Søren Knudsen.

In: Electrochimica Acta, Vol. 263, 02.2018, p. 228-236.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Model-supported characterization of a PEM water electrolysis cell for the effect of compression

AU - Frensch, Steffen Henrik

AU - Olesen, Anders Christian

AU - Simon Araya, Samuel

AU - Kær, Søren Knudsen

PY - 2018/2

Y1 - 2018/2

N2 - This paper investigates the influence of the cell compression of a PEM water electrolysis cell. A small single cell is therefore electrochemically analyzed by means of polarization behavior and impedance spectroscopy throughout a range of currents (0.01 A cm−2 to 2.0 A cm−2) at two temperatures (60°C and 80°C) and eight compressions (0.77 MPa–3.45 MPa). Additionally, a computational model is utilized to support the analysis. The main findings are that cell compression has a positive effect on overall cell performance due to decreased contact resistances, but is subject to optimization. In this case, no signs of severe mass transport problems due to crushed transport layers are visible in either polarization curves or impedance plots, even at high currents. However, a Tafel plot analysis revealed more than one slope throughout the current range. The change in the Tafel slope is therefore discussed and connected to the electrochemical reaction or an ohmic contribution from a non-electrode component.

AB - This paper investigates the influence of the cell compression of a PEM water electrolysis cell. A small single cell is therefore electrochemically analyzed by means of polarization behavior and impedance spectroscopy throughout a range of currents (0.01 A cm−2 to 2.0 A cm−2) at two temperatures (60°C and 80°C) and eight compressions (0.77 MPa–3.45 MPa). Additionally, a computational model is utilized to support the analysis. The main findings are that cell compression has a positive effect on overall cell performance due to decreased contact resistances, but is subject to optimization. In this case, no signs of severe mass transport problems due to crushed transport layers are visible in either polarization curves or impedance plots, even at high currents. However, a Tafel plot analysis revealed more than one slope throughout the current range. The change in the Tafel slope is therefore discussed and connected to the electrochemical reaction or an ohmic contribution from a non-electrode component.

KW - PEM water electrolysis

KW - Impedance spectroscopy

KW - Contact resistance

KW - Model validation

KW - Clamping pressure

U2 - 10.1016/j.electacta.2018.01.040

DO - 10.1016/j.electacta.2018.01.040

M3 - Journal article

VL - 263

SP - 228

EP - 236

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

ER -