Effects of Compression on the Removal of Water Droplet from GDLs of PEM Fuel Cells

Shojaeefard, Mohammad Hassan; Molaeimanesh, Gholam Reza; Moqaddari, Mohammad Reza

doi:10.1002/fuce.201900101

Cited by 11 publications

(10 citation statements)

References 54 publications

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“…Reactant distribution, and heat and water management are critically important to the performance of PEMFCs, especially at the system level, where the proton transport from the anode to the cathode side is crucial [ 357 , 358 , 359 , 360 , 361 , 362 , 363 ]. Dynamic contact angle (DCA) is of fundamental importance in the numerical investigation to conduct material simulation of water management problems in PEMFCs [ 364 , 365 , 366 , 367 ].…”

Section: Pemfc Water Managementmentioning

confidence: 99%

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Tellez-Cruz¹,

et al. 2021

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The study of the electrochemical catalyst conversion of renewable electricity and carbon oxides into chemical fuels attracts a great deal of attention by different researchers. The main role of this process is in mitigating the worldwide energy crisis through a closed technological carbon cycle, where chemical fuels, such as hydrogen, are stored and reconverted to electricity via electrochemical reaction processes in fuel cells. The scientific community focuses its efforts on the development of high-performance polymeric membranes together with nanomaterials with high catalytic activity and stability in order to reduce the platinum group metal applied as a cathode to build stacks of proton exchange membrane fuel cells (PEMFCs) to work at low and moderate temperatures. The design of new conductive membranes and nanoparticles (NPs) whose morphology directly affects their catalytic properties is of utmost importance. Nanoparticle morphologies, like cubes, octahedrons, icosahedrons, bipyramids, plates, and polyhedrons, among others, are widely studied for catalysis applications. The recent progress around the high catalytic activity has focused on the stabilizing agents and their potential impact on nanomaterial synthesis to induce changes in the morphology of NPs.

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Section: Pemfc Water Managementmentioning

confidence: 99%

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Tellez-Cruz¹,

et al. 2021

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“…Experimental research methods are limited due to the high cost and difficulty in precisely observing the internal transmission process of GDL. Numerical simulation methods, such as finite element method (FEM), , lattice Boltzmann method (LBM), − and pore network model, have become the main method to investigate the transport characteristics of GDL due to their low cost and flexible research scope. The water management of the GDL under compression was studied by Shi et al, and it was found that compression will increase the water saturation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Binder and Compression on the Transport Parameters of a Multilayer Gas Diffusion Layer

Wang

Yang

et al. 2021

Energy Fuels

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The effect of binder and compression on the transport parameters of the multilayer gas diffusion layer (GDL) is numerically studied by the lattice Boltzmann method. A stochastic algorithm is implemented to generate three multilayer GDLs with a porosity gradient and a uniform GDL, and then, the GDLs are compressed after the binder is added to obtain structures with various binder volume fractions and various compression ratios. The pore size distribution, through-plane (TP) permeability, in-plane (IP) permeability, tortuosity, and electric conductivity of the four structures of GDLs are analyzed. The pore size distributions of GDLs move toward smaller pores due to compression, and the GDL with a larger porosity gradient has a larger maximum pore size. The TP permeability decreases with the increase of compression ratio and binder volume fraction, and the TP permeability of the four GDLs decreases similarly due to compression, but the TP permeability of the multilayer GDL with a larger porosity gradient drops more due to the binder. IP permeability is slightly affected by the compression. Similar to TP permeability, the IP permeability of the multilayer GDL with a large porosity gradient decreases more due to the binder. Multilayer GDL with a small porosity gradient has a smaller tortuosity, more superior pore connectivity, and thus more outstanding gas permeability. The electric conductivity increases with the increase in compression ratio and binder volume fraction.

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“…Each PEM fuel cell consists of two cathode and anode electrodes, as well as a membrane. Each electrode is constructed from at least three parts: bipolar plate accompanied by the gas channels [8,9], catalyst layer (CL) [10,11], and gas diffusion layer (GDL) [12,13]. The GDL is an important porous section of an electrode, where the reactant gases in the gas channels are passed through it and are supplied to the reaction sites at the CL.…”

Section: Introductionmentioning

confidence: 99%

Pore‐scale analysis of a PEM fuel cell cathode including carbon cloth gas diffusion layer by lattice Boltzmann method

Molaeimanesh

Dahmardeh

2021

Fuel Cells

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One of the parameters which can greatly affect (i.e., enhances or diminishes) the performance of a PEM fuel cell cathode is the GDL microstructure. In the present study, the role of carbon cloth GDL microstructure on the performance of a PEM fuel cell cathode is investigated, for the first time. In this regard, three carbon cloth GDLs with three different microstructures are reconstructed via merging bundles of carbon fibers with sinusoidal form; afterward, the passing reactive air through these GDLs is simulated at pore-scale using lattice Boltzmann approach. The distributions of oxygen and water vapor through the carbon cloths and the distribution of current density on the catalyst layers are presented and analyzed. The results show that when the carbon cloth bundles consist of more fibers (i.e., having larger cross-sections), the penetration of oxygen toward the catalyst layer is more difficult, and consequently, the average current density is smaller. Besides, the results reveal that the through-plane compactness of carbon cloth microstructure does not bring a significant effect on the distribution of current density and species.

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Effects of Compression on the Removal of Water Droplet from GDLs of PEM Fuel Cells

Cited by 11 publications

References 54 publications

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Effect of Binder and Compression on the Transport Parameters of a Multilayer Gas Diffusion Layer

Pore‐scale analysis of a PEM fuel cell cathode including carbon cloth gas diffusion layer by lattice Boltzmann method

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