Effect of primary parameters on the performance of PEM fuel cell

Tohidi, Maryam; Mansouri, S. H.; Amiri, Hossein

doi:10.1016/j.ijhydene.2010.03.112

Cited by 29 publications

(10 citation statements)

References 15 publications

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“…Secondly, the diffusion coefficient is affected by pressure, which results in increase in diffusivity when the pressure increases. This trend is consistent with the findings of Tohidi et al [72].…”

Section: The Effect Of Operating Pressure On Cell Performancesupporting

confidence: 94%

A parametric study of Proton Electrolyte Membrane (PEM) fuel cell performances

Lim¹

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A two-dimensional, steady-state and isothermal model of the proton electrolyte membrane (PEM) fuel cell has been developed numerically, using a commercial package COMSOL. The single channel cell, which consists of seven regions, is used as the computational domain. The governing equations for mass, momentum, mass transport and charge equations are coupled and solved to produce the polarization curves for the fuel cell performance. The resultant polarization curves obtained from the numerical simulation are validated by comparing with the experimental results under normal operating conditions. Further, the benchmarked numerical model is used to investigate the effect of the temperature, concentration of hydrogen, concentration of oxygen, operating pressure, stoichiometric flow ratio, channel height, gas diffusion layer (GDL) thickness, membrane thickness and GDL porosity on the performance of the PEM fuel cell. Acknowledgment The author would like to express his sincere gratitude and appreciation towards the following party, who had helped him in this research work.

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Section: The Effect Of Operating Pressure On Cell Performancesupporting

confidence: 94%

A parametric study of Proton Electrolyte Membrane (PEM) fuel cell performances

Lim¹

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“…To obtain a more realistic model, some studies assigned a certain thickness to the CCL. 9,10 For example, to investigate combined liquid-gas flow within PEMFCs, Gurau et al 9 used a 2D model to represent the entire fuel cell, including the CCL as a separate layer. They considered the catalyst layer to be an isotropic porous medium and neglected the impeding effect of liquid water and, therefore, the possible dissolution of reactants into the water phase.…”

mentioning

confidence: 99%

Effects of Porosity and Water Saturation on the Effective Diffusivity of a Cathode Catalyst Layer

Fathi

Raoof

Mansouri

et al. 2017

J. Electrochem. Soc.

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The performance of a proton exchange membrane fuel cell, PEMFC, is significantly affected by the rate of oxygen diffusion through the cathode catalyst layer, CCL. Continuum-scale modelling of PEMFCs requires knowledge of the effective oxygen diffusivity as a function of CCL porosity and its water saturation. To provide this functionality, we used three-dimensional pore-scale modelling to simulate the diffusion of oxygen under different liquid water saturations in CCLs having different porosity values. Solving the governing equations for immiscible two-phase flow, fluid distributions at different saturation levels were obtained. We show that the presence of liquid water initiates a hindering effect by decreasing the diffusive transport of oxygen. Oxygen diffusion, including dissolution of oxygen into the liquid water phase, was taken into account to calculate effective diffusivity values of the entire domain. The resulting effective diffusivity values showed good agreement with values reported in the literature, which are often based on quasi-empirical relationships. Utilizing a large number of simulation results, a correlation equation was developed for the effective diffusivity of oxygen as a function of porosity and liquid water saturation, which is appropriate to be used for macroscopic modelling of flow and transport in CCLs.

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“…The effect of membrane selection is also lacking in the literature for open-cathode cells, whereas it is relatively well established that thin, reinforced membranes are favourable for high performing liquidcooled cells due to reduced ohmic resistance. 20,21 Gas diffusion layers (GDLs) may also play an important role in determining the overall cell performance by facilitating water and gas transport across the cell. 22 The addition of a microporous layer (MPL) on the CL side of a GDL generally benefits the performance of conventional PEMFCs 23 due to improved O 2 transport at the membrane electrode assembly (MEA) level and reduced mass transport resistance.…”

Section: CCLmentioning

confidence: 99%

Experimental Design of High-Performing Open-Cathode Polymer Electrolyte Membrane Fuel Cells

Sagar,

Chugh,

Kjeang

2024

ECS Adv.

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Open-cathode polymer electrolyte membrane fuel cells (PEMFCs) utilize a unique air-cooled system design to eliminate the humidifiers, air compressor, and liquid cooling loop of conventional, liquid-cooled PEMFC systems, thereby greatly reducing system cost. However, the open-cathode PEMFC performance is restricted by poor humidification, high membrane and charge transfer resistances, and overheating due to inefficient thermal and water management. This work aims to strategically modify the membrane electrode assembly (MEA) design to overcome these issues and achieve high open-cathode PEMFC performance that approaches that of liquid-cooled systems. The use of thinner membrane along with short side chain ionomer is found to elevate the cell performance due to increased water retention at the cathode catalyst layer (CCL) and decreased ohmic losses. Thinner gas diffusion layers with high porosity enable additional cell performance increment by improving oxygen availability at the CCL. An overall current density rise of 88% at 0.6 V and 53% at 0.4 V is achieved by the strategically designed MEA for open-cathode cells. The enhanced power density enabled by the custom MEA can both reduce the stack cost and expand the power range of open-cathode PEMFCs, thus expanding their potential use for low-cost fuel cell system applications.

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Effect of primary parameters on the performance of PEM fuel cell

Cited by 29 publications

References 15 publications

A parametric study of Proton Electrolyte Membrane (PEM) fuel cell performances

A parametric study of Proton Electrolyte Membrane (PEM) fuel cell performances

Effects of Porosity and Water Saturation on the Effective Diffusivity of a Cathode Catalyst Layer

Experimental Design of High-Performing Open-Cathode Polymer Electrolyte Membrane Fuel Cells

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