The effect of through plane pore gradient GDL on the water distribution of PEMFC

Ko, Donggun; Doh, Seok Joo; Park, Hyun Sun; Kim, Moo Hwan

doi:10.1016/j.ijhydene.2017.12.007

Cited by 68 publications

(26 citation statements)

References 27 publications

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“…[13][14][15][16] This will hinder the delivery of reaction gas to the catalyst layer and ultimately reduce the performance of the fuel cell. The current research has recognized that the porosity gradient along the thickness and length of the fuel cell in the cathode GDL will produce a capillary pressure gradient, [17] which will push the liquid water to the channel. This is very important to avoid the accumulation of cathode liquid water, enhance the transport of oxygen, and improve the performance of the fuel cell.…”

Section: Introductionmentioning

confidence: 99%

Effects of Gas Diffusion Layer Porosity Distribution on Proton Exchange Membrane Fuel Cell

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Effects of Gas Diffusion Layer Porosity Distribution on Proton Exchange Membrane Fuel Cell

et al. 2021

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“…By using this method, the PEMFC simulation convergence is achieved more rapidly. The effect of through plane pore gradient GDL is performed experimentally, by Park et al [24]. The results confirmed that through plane pore gradient GDL has a significant impact on the performance of PEMFC and the distribution of water.…”

Section: Introductionmentioning

confidence: 56%

Enhancing the performance of polymer electrolyte membrane fuel cell by optimizing the operating parameter

Ahmadi

Rostami

2019

J Braz. Soc. Mech. Sci. Eng.

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In present paper it is tried to concentrate to the configurations of gas channels and gas diffusion layers influences on the performance of polymer electrolyte membrane fuel cell. At first, increasing the number of channels is considered and observed such that the best results are gained with the case of three channels. Afterward, effect of prominent GDLs is studied. The prominences size is one of the main parameters which affect the performance. For this purpose, radius (R) of prominences is grown gradually. The optimal performance is obtained in the case of R = 0.45. In addition, the inlet velocity of gas flow is surveyed. The results indicate that when the inlet velocity of gases is set about 0.2 m s −1 , the species diffusion is optimized. Also, the height of channels is investigated to find out the optimal channel height. It is found that the highest performance is achieved in channel height about h = 1 mm and R = 0.45 mm.

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“…In addition to their enhanced mechanical stability and cell adhesion for biomedical applications [22], benefits have been reported in gas diffusion layers. This is attributed to the changing wettability, pore sizes and, therefore, diffusion properties along the gradient structure [23][24][25]. However, studies regarding porous FGMs are mostly of a theoretical nature, mainly due to the lack of established synthesis procedures [26].…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Magnetism in Gradient Porous Carbon Composite Aerogels

Bahner

Hug

Polarz

2021

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Porosity is of high importance for functional materials, as it allows for high surface areas and the accessibility of materials. While the fundamental interplay between different pore sizes and functionalities is quite well understood, few studies on gradually changing properties in a material exist. To date, only a few examples of such materials have been synthesized successfully. Herein, we present a facile method for synthesizing macroscopic carbon aerogels with locally changing pore sizes and functionalities. We used ultracentrifugation to fractionate differently functionalized and sized polystyrene nanoparticles. The assembly into gradient templates was conducted in a resorcinol–formaldehyde (RF) sol, which acted as a liquid phase and carbon precursor. We show that the modification of nanoparticles and a sol–gel precursor is a powerful tool for introducing dopants (sulfur and phosphorous) and metal nanoparticles (e.g., Ni) into gradient porous carbons formed during the carbonization of the RF sol. Understanding the underlying interactions between particles and precursors will lead to a plethora of possibilities in the material design of complex functionally graded materials. We showed this by exchanging parts of the template with magnetite–polystyrene composites as templating nanoparticles. This led to the incorporation of magnetite nanoparticles in the formed gradient porous carbon aerogels. Finally, gradually increasing concentrations of magnetite were obtained, ultimately leading to macroscopic carbon aerogels with locally changing magnetic properties, while the graded porosity was maintained.

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The effect of through plane pore gradient GDL on the water distribution of PEMFC

Cited by 68 publications

References 27 publications

Effects of Gas Diffusion Layer Porosity Distribution on Proton Exchange Membrane Fuel Cell

Effects of Gas Diffusion Layer Porosity Distribution on Proton Exchange Membrane Fuel Cell

Enhancing the performance of polymer electrolyte membrane fuel cell by optimizing the operating parameter

Anisotropic Magnetism in Gradient Porous Carbon Composite Aerogels

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