Determination of the pore size distribution of micro porous layer in PEMFC using pore forming agents under various drying conditions

Chun, Jeong Hwan; Park, Ki Tae; Jo, Dong Hyun; Lee, Ji Young; Kim, Pil Joo; Lee, Eun Sook; Jyoung, Jy Young; Kim, Sung Hyun

doi:10.1016/j.ijhydene.2010.07.056

Cited by 89 publications

(39 citation statements)

References 25 publications

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“…The result of increase of pore sizes and porosities in the diffusion layers with the Na 2 SO 4 amount was consistent with those reported in the polymer electrolyte fuel cells (PEFCs). 26,27 Pores in the diffusion layers of the fuel cell could be increased by adding 20% (wt%) ammonium slat as pore former. 26 With increase of sucrose dosages from 25 to 75 (w/o) as pore former in the diffusion layer of the fuel cell, the porosity of diffusion layer increased from 36% to 50%.…”

Section: Characterization Of Gas Diffusion Layer In the Cathodementioning

confidence: 99%

“…26,29 Since the catalyst layer in the GDC in the EF process faces to aqueous solution, the diffusion layer in the EF should prevent the electrolyte leakage through the cathode. 36,37 The specic requirement in the diffusion layer may limit the design of the pore structure of the diffusion layer using pore former, which should be further explored.…”

Section: Cbz Degradation In the Electro-fenton With Different Gdcsmentioning

confidence: 99%

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Effect of an improved gas diffusion cathode on carbamazepine removal using the electro-Fenton process

Wang

Luo

et al. 2017

RSC Adv.

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The aim of this study was to investigate the effect of the diffusion layer of a gas diffusion cathode (GDC) on H 2 O 2 production to enhance carbamazepine removal using the electro-Fenton process. The diffusion layer was made by carbon black and polytetrafluoroethylene with sodium sulfate (Na 2 SO 4 ) as a pore former. Different ratios of Na 2 SO 4 to carbon black (w/w) (i.e., 0%, 50%, 100%, 150%, and 200%) in the diffusion layer were tested. With an increase of the ratio, the average pore size in the diffusion layer and the electro-activity in the GDC increased simultaneously, which resulted in a higher mass transfer coefficient ), mainly attributable to the diffusion layer modified by the pore former, which accelerated oxygen transfer and boosted H 2 O 2 production. The results from this study should be useful to remove carbamazepine from wastewater treatment using the electro-Fenton (EF) process with improvement of pore structure in the diffusion layer of GDC.

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Section: Characterization Of Gas Diffusion Layer In the Cathodementioning

confidence: 99%

Section: Cbz Degradation In the Electro-fenton With Different Gdcsmentioning

confidence: 99%

Effect of an improved gas diffusion cathode on carbamazepine removal using the electro-Fenton process

Wang

Luo

et al. 2017

RSC Adv.

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“…Where, σ s is electrical conductivity of solid material and ϕ s is solid phase potential. Eqns (10) and (12) represent hydrogen proton transport through electrolyte phase. Catalyst layer has mixed conductivity (ionic conductivity and electrical conductivity).…”

Section: Anode/cathode Catalyst Layersmentioning

confidence: 99%

The Effect of Microporous Layer in Phosphoric Acid Doped Polybenzimidazole Polymer Electrolyte Membrane Fuel Cell

Çelik¹

2013

J Appl Mech Eng

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A polybenzimidazole (PBI) based polymer electrolyte fuel cells, which called high temperature polymer electrolyte fuel cells (HT-PEMS), operate at higher temperatures (120-200°C) than conventional PEM fuel cells. Although it is known that HT-PEMS have some of the significant advantages as non-humidification requirements for membrane and the lack of liquid water at high temperature in the fuel cell, the generated water as a result of oxygen reduction reaction causes in the degradation of these systems. The generated water absorbed into membrane side interacts with the hydrophilic PBI matrix and it can cause swelling of membrane, so water transport mechanism in a Membrane Electrode Assembly (MEA) needs to be well understood and water balance must be calculated in MEA. Therefore, the water diffusion transport across the electrolyte should be determined. In this study, it is investigated firstly the water content in a MEA in the case of with/without Microporous Layer (MPL). Secondly, in the case of with MPL the effect of microporous layer's thickness on the water management in fuel cell is investigated. For this aim, two-dimensional fuel cell with interdigitated flow-field is modeled using Comsol Multiphysics 4.2a software. The operating temperature and doping level is selected as 180°C and 6.75 RPU H 3 PO 4 /PBI, respectively. The results of this work brought out that MPL significantly effects to water content in MEA and reduces H 2 O concentration in MEA. Thus it can be prevented to flooding in MEA and so durability of the cell is increased.

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“…Fig. 3A shows that cracks in the CL are caused by underlying cracks in the GDL with the CCG method, because it is a coating and drying of CL occurs on macroporous carbon paper or cloth with pore sizes ranging from 0.1 to 100 mm [23]. Fig.…”

Section: Effect Of the Glycerol-to-carbon Ratiomentioning

confidence: 99%

Optimization of catalyst ink composition for the preparation of a membrane electrode assembly in a proton exchange membrane fuel cell using the decal transfer

Jung

Kim

2012

International Journal of Hydrogen Energy

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Determination of the pore size distribution of micro porous layer in PEMFC using pore forming agents under various drying conditions

Cited by 89 publications

References 25 publications

Effect of an improved gas diffusion cathode on carbamazepine removal using the electro-Fenton process

Effect of an improved gas diffusion cathode on carbamazepine removal using the electro-Fenton process

The Effect of Microporous Layer in Phosphoric Acid Doped Polybenzimidazole Polymer Electrolyte Membrane Fuel Cell

Optimization of catalyst ink composition for the preparation of a membrane electrode assembly in a proton exchange membrane fuel cell using the decal transfer

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