Modelling of the vapour–liquid equilibrium of water and the in situ concentration of H3PO4 in a high temperature proton exchange membrane fuel cell

Kazdal, Timur; Lang, Sebastian; Kühl, Frank; Hampe, Manfred J.

doi:10.1016/j.jpowsour.2013.10.098

Cited by 21 publications

(13 citation statements)

References 33 publications

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“…Therefore, the redistribution of the acid‐water mixture inside the MEA during operation at high current densities could be possible. Mathematical simulations in literature 26 have shown an electrolyte redistribution into the porous electrode framework, going together with pore filling. It has been assumed that the electrode thickness underlies negligible changes during this flooding process.…”

Section: Resultsmentioning

confidence: 97%

“…High loads imply a high water production, leading to a volume expansion of the acid‐water mixture. Under high load conditions this mixture underlies a redistribution from the membrane into the catalyst layer and moreover into the GDL, so that the phosphoric acid can be dragged from the fuel cell and is not any longer available as electrolyte 26.…”

Section: Resultsmentioning

confidence: 99%

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Impact of Accelerated Stress Tests on High Temperature PEMFC Degradation

et al. 2016

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Accelerated stress tests (ASTs) have been used to provoke and investigate degradation mechanisms inside commercial high temperature proton exchange membrane electrode assemblies based on phosphoric acid doped polybenzimidazole (PBI). A novel load cycling test using high current densities of 0.6 and 1.0 A cm -2 has been developed and compared with a test utilizing lower current densities between 0.0 and 0.3 A cm -2 . A high comparability is ensured by testing membrane electrode assemblies (MEAs) from the same supplier and batch under identical test conditions. Next to daily electrochemical characterization (polarization curves, electrochemical impedance spectroscopy, linear sweep and cyclic voltammetry), ex situ investigations including product water analysis by inductively coupled plasma mass spectrometry (ICP-MS) and micro-computed tomography (m-CT) as a powerful 3D imaging tool have been carried out. Clear demarcations of AST consequences for cell ageing have been identified. Especially, differences in platinum catalyst degradation and in loss of phosphoric acid as electrolyte over AST time have been revealed. Furthermore, influences of electrochemical characterization on MEA performance have been shown, which should be considered in future durability tests of fuel cells.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Impact of Accelerated Stress Tests on High Temperature PEMFC Degradation

et al. 2016

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“…In addition, cell performance drop caused by cathode humidification was confirmed by the simulation results. Kazdal et al [19] built a 2D HT-PEM fuel cell model which incorporated the vapor-liquid equilibrium of water-phosphoric acid and evaporation kinetics. They also reported that the cell performance decreased with increasing humidity.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of inlet gas humidity on the performance of a HT‐PEM fuel cell was also investigated by numerical simulation , . In a water transport model with a fixed water diffusion coefficient through the membrane was incorporated with a 3‐D HT‐PEM fuel cell model.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Effect of Humidity Level of H₂ on Cell Performance of a HT‐PEM Fuel Cell

2019

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High temperature polymer electrolyte membrane (HT‐PEM) fuel cell is often integrated with a light fossil fuel reformer to improve the fuel flexibility. Although the operation of HT‐PEM fuel cell does not rely on the humidification of the inlet gas, water vapor is found in the reformate gas which is fed to the HT‐PEM fuel cell. In this work, the influence of water content in the H2 to the cell performance of a HT‐PEM fuel cell is studied under different operating temperatures. Under lower operating temperature of 140 °C, the HT‐PEM fuel cell shows the best performance with low water content in the H2. With increasing water content, the cell performance decreases. Under the operating temperature of 160 °C, the best cell performance is achieved with an intermediate water content in the H2. While under high operating temperature of 180 °C, the cell performance shows an increasing trend with the increase in the water content. By measuring the impedance spectra of the HT‐PEM fuel cell, the reasons for the different influence of anode humidification in cell performance at different operating temperatures were investigated.

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Catalyst Development for High‐Temperature Polymer Electrolyte Membrane Fuel Cell (HT‐PEMFC) Applications

Šešelj¹,

Alfaro²,

Bompolaki³

et al. 2023

Advanced Materials

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A constant increase in global emission standard is causing fuel cell (FC) technology to gain importance. Over the last two decades, a great deal of research has been focused on developing more active catalysts to boost the performance of high‐temperature polymer electrolyte membrane fuel cells (HT‐PEMFC), as well as their durability. Due to material degradation at high‐temperature conditions, catalyst design becomes challenging. Two main approaches are suggested: (i) alloying platinum (Pt) with low‐cost transition metals to reduce Pt usage, and (ii) developing novel catalyst support that anchor metal particles more efficiently while inhibiting corrosion phenomena. In this comprehensive review, the most recent platinum group metal (PGM) and platinum group metal free (PGM‐free) catalyst development is detailed, as well as the development of alternative carbon (C) supports for HT‐PEMFCs.

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Modelling of the vapour–liquid equilibrium of water and the in situ concentration of H3PO4 in a high temperature proton exchange membrane fuel cell

Cited by 21 publications

References 33 publications

Impact of Accelerated Stress Tests on High Temperature PEMFC Degradation

Impact of Accelerated Stress Tests on High Temperature PEMFC Degradation

Investigation of the Effect of Humidity Level of H₂ on Cell Performance of a HT‐PEM Fuel Cell

Catalyst Development for High‐Temperature Polymer Electrolyte Membrane Fuel Cell (HT‐PEMFC) Applications

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Modelling of the vapour–liquid equilibrium of water and the in situ concentration of H3PO4 in a high temperature proton exchange membrane fuel cell

Cited by 21 publications

References 33 publications

Impact of Accelerated Stress Tests on High Temperature PEMFC Degradation

Impact of Accelerated Stress Tests on High Temperature PEMFC Degradation

Investigation of the Effect of Humidity Level of H2 on Cell Performance of a HT‐PEM Fuel Cell

Catalyst Development for High‐Temperature Polymer Electrolyte Membrane Fuel Cell (HT‐PEMFC) Applications

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About

Investigation of the Effect of Humidity Level of H₂ on Cell Performance of a HT‐PEM Fuel Cell