Electrochemical durability of gas diffusion layer under simulated proton exchange membrane fuel cell conditions

Chen, Guobao; Zhang, Huamin; Ma, Haipeng; Zhong, Hexiang

doi:10.1016/j.ijhydene.2009.07.085

Cited by 81 publications

(47 citation statements)

References 25 publications

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“…In this context, it may be stated that a more homogeneous current density distributions would likely extend the life time of the fuel cell, as mentioned in [23,24]. It should be noted that the water management is influenced by many effects, e.g., water removal due to high reactant flow rate [25] or GDL oxidation by substances as hydrogen peroxide and sulfuric acid degrades fuel cell operation [16,26].…”

Section: Resultsmentioning

confidence: 99%

“…Solutions used for chemical modification may influence the carbon fibers and the diffusion layer becomes less stable during the temperature increase. Diluted solutions can oxidize carbon fibers [16] and this corrosion process results in formation of substances such as phenol and carboxyl groups [17].…”

Section: Resultsmentioning

confidence: 99%

“…For chemical modification the GDL samples were exposed to 1 M hydrogen peroxide or 1 M sulfuric acid solutions for 24 h in 80°C [16,18]. These modified samples were immersed in deionized (DI) water to remove the residues of solution.…”

Section: Experimental Sample Preparationmentioning

confidence: 99%

“…We have also considered a treatment of the samples with sulfuric acid or hydrogen peroxide to affect the PTFE coating of carbon fibers [16] leading to a severe loss of hydrophobicity as reported by Borup et al [17]. Then we have compared laser patterned GDLs with chemically treated samples to evaluate the differences between these two methods of the PTFE content modification.…”

Section: Introductionmentioning

confidence: 99%

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Modification of gas diffusion layers properties to improve water management

Martı́n

Biswas

Gazdzicki

et al. 2017

Mater Renew Sustain Energy

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In this paper we report an approach to improve water management of commercial GDLs by introducing hydrophobicity patterns. Specifically, line and grid patterns have been created in the MPL side by laser radiation. For an in-depth investigation of these modified GDLs the current density distribution was monitored during fuel cell operation. Additionally, the physical properties of these materials were investigated by a number of ex situ methods such as Fourier transform infrared microscopy, electrochemical impedance spectroscopy and water vapor sorption. Furthermore, a comparison of the physical properties of the patterned GDLs with chemically modified GDLs (treated in H 2 SO 4 and H 2 O 2 ) is provided. Our results show a clearly improved homogeneity of current density distribution of the patterned GDLs compared to untreated GDLs. This observation is likely due to a reduced local hydrophobicity which facilitates water diffusion along the flow field of the fuel cell. However, performance of the fuel cell was not affected by the MPL irradiation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Experimental Sample Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modification of gas diffusion layers properties to improve water management

Martı́n

Biswas

Gazdzicki

et al. 2017

Mater Renew Sustain Energy

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“…Yuan et al [1] reported EIS has already become a primary tool in PEMFC research. EIS method is also used effectively for analyses of the amount of catalysts [2][3][4][5], nafion content [3,[6][7][8], membrane thickness [9,10], GDL structure [11][12][13][14][15][16][17][18][19], proton conductivity [20][21][22][23][24][25][26], humidification condition [3,9,[27][28][29][30] and stack [24,[31][32][33][34][35][36]. For example, Paganin et al [2] and Song et al [3] suggested that charge transfer resistance is much smaller with increasing amount of catalysts.…”

Section: Page 3 Of 34mentioning

confidence: 99%

Evaluation of polymer electrolyte membrane fuel cells by electrochemical impedance spectroscopy under different operation conditions and corrosion

Kumagai¹,

Ichikawa

Yashiro

2010

Journal of Power Sources

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Electrochemical impedance spectroscopy (EIS) was employed for in situ diagnosis for polymer electrolyte membrane fuel cells during operation. First, EIS was measured as a function of operation parameters such as applied current density, gas flow rates and gas humidification temperature. The resistance that correlated with conductivity of the membrane and the contact resistance between bipolar plate and gas A c c e p t e d M a n u s c r i p t 2 diffusion layer (GDL) was set as R m in the assumed equivalent circuit. The charge transfer resistances were considered for cathode (R ct (C)). The value of R ct (C) was sensitive to the parameters that affected cell voltage. Additionally, the diffusion resistance (R d ) was ascribed to the effect of oxygen supply and drainage of generated water. Second, the influence of corrosion of type 430 stainless steel bipolar plates was evaluated by EIS method during operation. Corrosion of the stainless steel bipolar plates resulted in an increase in the value of R d .

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Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO₂

et al. 2020

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The world emits over 14 gigatons of CO2 in excess of what can be remediated by natural processes annually, contributing to rising atmospheric CO2 levels and increasing global temperatures. The electrochemical reduction of CO2 (CO2RR) to value‐added chemicals and fuels has been proposed as a method for reusing these excess anthropogenic emissions. While state‐of‐the‐art CO2RR systems exhibit high current densities and faradaic efficiencies, research on long‐term electrode durability, necessary for this technology to be implemented commercially, is lacking. Previous reviews have focused mainly on the CO2 electrolyzer performance without considering durability. In this Review, the need for research into high‐performing and durable CO2RR systems is stressed by summarizing the state‐of‐the‐art with respect to durability. Various failure modes observed are also reported and a protocol for standard durability testing of CO2RR systems is proposed.

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Electrochemical durability of gas diffusion layer under simulated proton exchange membrane fuel cell conditions

Cited by 81 publications

References 25 publications

Modification of gas diffusion layers properties to improve water management

Modification of gas diffusion layers properties to improve water management

Evaluation of polymer electrolyte membrane fuel cells by electrochemical impedance spectroscopy under different operation conditions and corrosion

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO₂

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Electrochemical durability of gas diffusion layer under simulated proton exchange membrane fuel cell conditions

Cited by 81 publications

References 25 publications

Modification of gas diffusion layers properties to improve water management

Modification of gas diffusion layers properties to improve water management

Evaluation of polymer electrolyte membrane fuel cells by electrochemical impedance spectroscopy under different operation conditions and corrosion

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO2

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Product

Resources

About

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO₂