Gas diffusion through differently structured gas diffusion layers of PEM fuel cells

Zhan, Zhigang; Xiao, Jinsheng; Zhang, Yongsheng; Pan, Mu; Run-zhang, Yuan

doi:10.1016/j.ijhydene.2007.03.041

Cited by 79 publications

(34 citation statements)

References 23 publications

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“…Porosity gradients may in-fact play an important role in determining the liquid water distribution and overall saturation as shown by Zhan et al [45] and more recently Wang and Chen [16] and Garcia-Salaberri et al [46]. As porosity is directly linked to the local fibre spacing the results presented in this study would also indicate that porosity grading plays an important role in directing liquid transport.…”

Section: Saturationsupporting

confidence: 68%

The effects of compression on single and multiphase flow in a model polymer electrolyte membrane fuel cell gas diffusion layer

Tranter

Burns

Ingham

et al. 2015

International Journal of Hydrogen Energy

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A two-dimensional study of an idealised fibrous medium representing the gas diffusion layer of a PEMFC is conducted using computational fluid dynamics. Beginning with an isotropic case the medium is compressed uni-directionally to observe the effects on single and multiphase flow. Relations between the compression ratio and the permeability of the medium are deduced and key parameters dictating the changes in flow are elucidated. The main conclusions are that whilst compression reduces the absolute permeability of an isotropic medium, the creation of anisotropic geometry results in preferential liquid water pathways. The most important parameter for capillary flow, in uniformly hydrophobic media, is the minimum fibre spacing normal to the flow path. The effect is less pronounced with decreasing contact angle and non-existent for neutrally wettable media.

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Section: Saturationsupporting

confidence: 68%

The effects of compression on single and multiphase flow in a model polymer electrolyte membrane fuel cell gas diffusion layer

Tranter

Burns

Ingham

et al. 2015

International Journal of Hydrogen Energy

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“…In particular, excellent gas diffusion (mass transport) of the functionally graded micro-porous layers is exhibited by the larger pores and superior water management through the nanopores towards the catalyst layers, under lower RH conditions to keep the electrolyte moist. A mathematical model based on capillary theory and multi-gas diffusion theory also favors GDL with gradient porosity for the liquid water to be discharged out and retaining less liquid in the GDL leading to superior gas diffusion characteristics [22]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Functionally graded nano-porous gas diffusion layer for proton exchange membrane fuel cells under low relative humidity conditions

Kannan

Cindrella

Munukutla

2008

Electrochimica Acta

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“…They can affect the polarisation performance of fuel cell and also aid the water management, particularly the water extraction from the cell [9]. Therefore a new improved design could produce a higher cell performance [10,11].…”

Section: Parametersmentioning

confidence: 99%

Design of experiment study of the parameters that affect performance of three flow plate configurations of a proton exchange membrane fuel cell

Carton

Olabi

2010

Energy

195

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Low temperature hydrogen fuel cells are electrochemical devices which offer a promising alternative to traditional power sources. Fuel cells produce electricity with a reaction of the fuel (hydrogen) and air. Fuel cells have the advantage of being clean; only producing water and heat as by products. The efficiency of a fuel cell varies depending on the type; SOFC with CHP for example, can have a system efficiency of up to 65%.What the Authors present here is a comparison between three different configurations of flow plates of a proton exchange membrane fuel cell, the manufacturer's serpentine flow plate and two new configurations; the maze flow plate and the parallel flow plate. A study of the input parameters affecting output responses of voltage, current, power and efficiency of a fuel cell is performed through experimentation. The results were taken from direct readings of the fuel cell and from polarisation curves produced. This information was then analysed through a design of experiment to investigate the effects of the changing parameters on different configurations of the fuel cell's flow plates.The results indicate that, in relation to current and voltage response of the polarisation curve and the corresponding graphs produced from the DOE, the serpentine flow plate design is a much more effective design than the maze or parallel flow plate design. It was noted that the parallel flow plate performed reasonably well at higher pressures but over all statically the serpentine flow plate performed better.

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Gas diffusion through differently structured gas diffusion layers of PEM fuel cells

Cited by 79 publications

References 23 publications

The effects of compression on single and multiphase flow in a model polymer electrolyte membrane fuel cell gas diffusion layer

The effects of compression on single and multiphase flow in a model polymer electrolyte membrane fuel cell gas diffusion layer

Functionally graded nano-porous gas diffusion layer for proton exchange membrane fuel cells under low relative humidity conditions

Design of experiment study of the parameters that affect performance of three flow plate configurations of a proton exchange membrane fuel cell

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