Modeling of PEM fuel cell with thin MEA under low humidity operating condition

Li, Yubai; Zhou, Zhifu; Liu, Xianglei; Wu, Wei‐Tao

doi:10.1016/j.apenergy.2019.03.189

Cited by 78 publications

(33 citation statements)

References 64 publications

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“…In this way, the link between the dew point temperature and the inlet temperature depicts the influence of humidity on performance, as shown in detail in Figure 8. When the dew point temperature decreases, the RH decreases, and therefore, the lack of water in the membrane impedes the transport of the reactants and reduces the activity of the catalysts in the triple‐phase boundaries, which seriously reduces the reaction activation energy 62 . The change in the RH of the anode has a significant effect on performance than the cathode because the electro‐osmotic drag transfers water molecules from the anode to the cathode, making the anode more prone to water shortage 63 .…”

Section: Resultsmentioning

confidence: 99%

“…When the dew point temperature decreases, the RH decreases, and therefore, the lack of water in the membrane impedes the transport of the reactants and reduces the activity of the catalysts in the triple-phase boundaries, which seriously reduces the reaction activation energy. 62 The change in the RH of the anode has a significant effect on performance than the cathode because the electro-osmotic drag transfers water molecules from the anode to the cathode, making the anode more prone to water shortage. 63 The increase in the air inlet humidity can ensure that the anode has sufficient water content for reaction, so as to improve the output performance.…”

Section: Dew Point Temperature Of Anode and Cathodementioning

confidence: 99%

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Exploring the direct influence of control parameters of experimental facility for fuel cells based on improved generalized regression neural network

Pan

Huang

et al. 2020

Int J Energy Res

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Section: Resultsmentioning

confidence: 99%

Section: Dew Point Temperature Of Anode and Cathodementioning

confidence: 99%

Exploring the direct influence of control parameters of experimental facility for fuel cells based on improved generalized regression neural network

Pan

Huang

et al. 2020

Int J Energy Res

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“…37 Recent numerical models include the creation of a model to predict the transport of water within a single cell, 48 where the effects of water content on the electrochemical behaviour of the cell predicted accurately. A similar study 49 also incorporates the modelling of oxygen content and temperature. The effects of low humidity operating conditions with a thin MEA (membrane electrode assembly) are elucidated by performing channel and cell-level simulations.…”

Section: Introductionmentioning

confidence: 99%

Thermal characteristics of an air‐cooled open‐cathode proton exchange membrane fuel cell stack via numerical investigation

et al. 2020

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In light of stricter emissions regulations and depleting fossil fuel reserves, fuel cell vehicles (FCVs) are one of the leading alternatives for powering future vehicles. An open-cathode, air-cooled proton exchange membrane fuel cell (PEMFC) stack provides a relatively simple electric generation system for a vehicle in terms of system complexity and number of components. The temperature within a PEMFC stack is critical to its level of performance and the electrochemical efficiency. Previously created computational models to study and predict the stack temperature have been limited in their scale and the inaccurate assumption that temperature is uniform throughout. The present work details the creation of a numerical model to study the temperature distribution of an 80-cell Ballard 1020ACS stack by simulating the cooling airflow across the stack. Using computational fluid dynamics, a steady-state airflow simulation was performed using experimental data to form boundary conditions where possible. Additionally, a parametric study was performed to investigate the effect of the distance between the stack and cooling fan on stack performance. Model validation was performed against published results. The temperature distribution across the stack was identical for the central 70% of the cells, with eccentric temperatures observed at the stack extremities, while the difference between coolant and bipolar plate temperatures was approximately 10 C at the cooling channel outlets. The results of the parametric study showed that the fan-stack distance has a negligible effect on stack performance. The assumptions regarding stack temperature uniformity and measurement were challenged. Lastly, the hypothesis regarding the negligible effect of fan-stack distance on stack performance was confirmed.

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“…Polymer electrolyte membrane (PEM) is a key component in fuel cell technology, as it provides proton transfer and separates anode and cathode space [1]. Sulfonated poly(ether ether ketone) is an example of PEM, and it is a promising material for application in hydrogen fuel cell [1], direct flow methanol fuel cell (DMFC) [2], for water desalination by electrodialysis [3] and it can also be used in CO2 converters for CO2 electrochemical reduction into hydrocarbons [4].…”

Section: Introduction mentioning

confidence: 99%

Composite Membranes of Sulfonated Poly(ether ether ketone) with Active Carbon: Composite Preparation and Investigation of their Properties for Potential Application for CO2 Electrochemical Reduction

Fedorenko

Vaivars²

2020

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In this study, synthesis of sulfonated poly(ether ether ketone) (SPEEK) was performed using sulfonation method with concentrated sulfuric acid. Polymer with three degrees of sulfonation was obtained: 0.87; 0.82 and 0.74. Composite membranes were synthesized with an activated carbon. Ultrasonication method was used in order to achieve homogeneity of distribution of the additive in polymer solution and then in polymer membranes. Membranes with various content of the additive were made: 0; 0.15; 0.3; 0.5; 0.6; 0.8; 1.0; 2.0 and 3.0 %. Swelling degree, water uptake, proton conductivity, isoelectric point, thermal properties and surface morphology of the membranes were analyzed. Proton conductivity was determined using impedance analysis with two electrode system and through-plane configuration. Two methods were used: differential and single membrane method. Differential method is proposed to have significant advantage as it reduces contact resistance, which otherwise is difficult to control and evaluate. Surface zeta potential of membrane surface was investigated, and membranes have shown variation of the potential. Isoelectric point was determined for the membranes with DS 0.82 and carbon content 0 % and 0.5 %, and it was found to be at pH 4. Water uptake and swelling degree of the membranes was studied, and active carbon content was found to not have major influence on those properties, but higher content of sulfonic groups leads to increased water uptake and swelling degree. Thermogravimetric analysis showed slightly better thermal properties of membranes with the additive, compared to the blank membranes, which can be related to differences in the water uptake. Surface of the membrane was investigated using scanning electron microscopy, and no considerable defects were observed.

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Modeling of PEM fuel cell with thin MEA under low humidity operating condition

Cited by 78 publications

References 64 publications

Exploring the direct influence of control parameters of experimental facility for fuel cells based on improved generalized regression neural network

Exploring the direct influence of control parameters of experimental facility for fuel cells based on improved generalized regression neural network

Thermal characteristics of an air‐cooled open‐cathode proton exchange membrane fuel cell stack via numerical investigation

Composite Membranes of Sulfonated Poly(ether ether ketone) with Active Carbon: Composite Preparation and Investigation of their Properties for Potential Application for CO2 Electrochemical Reduction

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