Thermal conductivity of catalyst layer of polymer electrolyte membrane fuel cells: Part 2 – Analytical modeling

Ahadi, Mohammad; Pütz, Andreas; Stumper, Jürgen; Bahrami, Majid

doi:10.1016/j.jpowsour.2017.03.100

Cited by 10 publications

(7 citation statements)

References 59 publications

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“…One should be cautious when using this method at lower pressures, as the effects of TCRs may no longer be negligible at lower pressures. In this work, there was no need for confirming validity of the method for lower pressures, as thermal conductivity of CLs does not change much with pressure , . Besides, this method is applicable for the entire ∼1,500–3,000 kPa working pressure range of fuel cells.…”

Section: Resultsmentioning

confidence: 99%

“…Other products of the overall electrochemical reaction include water and waste heat. All the electricity generation/consumption and most of the waste heat generation modes occur inside the CLs . One of the contributing heat transfer modes is Joule heating due to electron conduction inside the CLs, where the electrons are generated (anode) or consumed (cathode).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Thermal and Electronic Conductivities of Catalyst Layers of Polymer Electrolyte Membrane Fuel Cells

et al. 2019

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This work proposes new and accurate systematic methodologies for ex situ measurements of through‐plane thermal and in‐plane electronic conductivities of catalyst layers (CLs) of polymer electrolyte membrane fuel cells (PEMFC). The developed methods are based on measurements of different thicknesses/lengths of a CL on different substrates. Suitability of the proposed methods is confirmed through a set of microstructural properties measurements on a typical CL design to ensure the measured CLs would be representative of CLs in a real fuel cell product. Conductivity measurements of two CL designs with different compositions and microstructures confirm capability of the developed procedures to track structural changes in CLs. The present characterization platform is not limited to CLs and may be used for other composite porous materials with similar structures.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of Thermal and Electronic Conductivities of Catalyst Layers of Polymer Electrolyte Membrane Fuel Cells

et al. 2019

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“…These two differences can explain the difference in compressibility aand also in thermal conductivity, as graphitisation is proven to improve thermal conductivity of porous carbon by a factor of four (36). The measurements by Ahadi et al (50) was supported by a numerical model (51). Clearly, also within CL thermal conductivity, several research questions remain unanswered.…”

Section: Thermal Conductivity Valuesmentioning

confidence: 97%

“…The MPL and the catalyst layers have many similarities and therefore it is interesting to investigate the thermal conductivity also of the CL, even though it can have a thickness of 10-30 µm. At least three studies of thermal conductivity of CL thermal conductivity exists (24,50,51). Two of these studies looks at stand-alone catalyst layers.…”

Section: Thermal Conductivity Valuesmentioning

confidence: 99%

(Invited) Review: PEMFC Materials' Thermal Conductivity and Influence on Internal Temperature Profiles

Burheim

2017

ECS Trans.

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The polymer electrolyte membrane fuel cell (PEMFC) is far from isothermal when in operation. This is well established both from experiments and from mathematical modelling. Over the last 15 years, the research field and knowledge about thermal conductivity and heat generation in the PEMFC materials has been established and developed. From first looking at through-plane thermal conductivity of only membranes and gas diffusion layers (GDL), the most recent studies include heat transport properties on non-isotropic properties, PTFE content, water content, compression, heat pipe effects, and material integration. This short review explains the knowledge development within the field of thermal conductivity of PEMFC materials and regions over the last 15 years. It also shows how this knowledge changes our understanding of internal temperature profiles in a PEMFC under operation using a 2D-continuum based thermal model.

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“…Among them, the agglomerate model, which shows the best match with experimental data, 22 has been used more oen to study the related issues of CL in recent years. [23][24][25][26] Moein-Jahromi et al 21 used the agglomerate model to simulate the CL, and the results were compared with those of the homogeneous one. A set of parametric studies were performed, in which the agglomerate size was found to be the Fig.…”

Section: Introductionmentioning

confidence: 99%

Analytical modeling framework for performance degradation of PEM fuel cells during startup–shutdown cycles

Chen

Liu

et al. 2020

RSC Adv.

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Thermal conductivity of catalyst layer of polymer electrolyte membrane fuel cells: Part 2 – Analytical modeling

Cited by 10 publications

References 59 publications

Characterization of Thermal and Electronic Conductivities of Catalyst Layers of Polymer Electrolyte Membrane Fuel Cells

Characterization of Thermal and Electronic Conductivities of Catalyst Layers of Polymer Electrolyte Membrane Fuel Cells

(Invited) Review: PEMFC Materials' Thermal Conductivity and Influence on Internal Temperature Profiles

Analytical modeling framework for performance degradation of PEM fuel cells during startup–shutdown cycles

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