Influence of ageing in fuel cell on membrane/electrodes interfaces

Danerol, Anne-Sophie; Bas, Corine; Flandin, Lionel; Claude, E.; Albérola, N.

doi:10.1016/j.jpowsour.2010.12.014

Cited by 21 publications

(9 citation statements)

References 26 publications

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“…Issues related to fuel cell durability are mainly due to membrane electrode assembly (MEA) failure 3 . Further investigations uncovered the degradation of each MEA component, such as the catalyst, 4 carbon support, 5 and electrolyte membrane, 6 with the vulnerability of the electrolyte membrane to degradation largely governing the fuel cell lifetime 7 …”

Section: Introductionmentioning

confidence: 99%

“…3 Further investigations uncovered the degradation of each MEA component, such as the catalyst, 4 carbon support, 5 and electrolyte membrane, 6 with the vulnerability of the electrolyte membrane to degradation largely governing the fuel cell lifetime. 7 A critical factor is the mechanical failure of the membrane due to stress fatigue during the PEMFC wet-dry cycle. A reduction in the mechanical strength leads to crack formation in the membrane during fuel cell operation and, finally, MEA failure.…”

Section: Introductionmentioning

confidence: 99%

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Macromolecular antioxidants for chemically durable polymer electrolyte fuel cell membranes

Kodir

Shin

Park

et al. 2021

Intl J of Energy Research

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Summary We investigated macromolecular antioxidants to improve the stabilities of polymer electrolyte membranes during fuel cell operation. Fenton's oxidative test was conducted to screen the scavenging activities of five different antioxidants, and Fourier transforms infrared spectroscopy and fluoride emission, conductivity, and tensile strength analyses were employed to monitor their effects on membrane degradation. The proton conductivities and water absorption of the composite membranes were comparable to those of the pristine membrane, which may overcome issues with metal antioxidants. Moreover, open‐circuit voltage (OCV) studies confirmed their positive effects during fuel operation. The OCV study showed that the membrane containing macromolecular antioxidants maintained a higher OCV than the pristine Nafion membrane, as verified by in situ analysis. Therefore, macromolecular antioxidants are useful for increasing the chemical durabilities of fuel cell membranes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Macromolecular antioxidants for chemically durable polymer electrolyte fuel cell membranes

Kodir

Shin

Park

et al. 2021

Intl J of Energy Research

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“…1,2 Methanol has various advantages for H 2 formation than other liquid hydrocarbons. 3 The methanol advantages is assigned to the weak C C bond that leads to a reforming process with low temperature (200 C-300 C), high ratio of H 2 /CO about 4, convenient storage and transportation, which is not feasible for other hydrocarbons as methane (reformed above 500 C 4 ) or ethanol (reformed within 400 C 5 ). In addition, methanol with high purity has no sulfur, which is suitable for the reforming process with high activity.…”

Section: Introductionmentioning

confidence: 99%

“…To the formation of hydrogen, the alcohols and hydrocarbons reforming leads to hydrogen production in situ, avoiding the problems such as storage and transportation of hydrogen 1,2 . Methanol has various advantages for H 2 formation than other liquid hydrocarbons 3 . The methanol advantages is assigned to the weak CC bond that leads to a reforming process with low temperature (200°C‐300°C), high ratio of H 2 /CO about 4, convenient storage and transportation, which is not feasible for other hydrocarbons as methane (reformed above 500°C 4 ) or ethanol (reformed within 400°C 5 ).…”

Section: Introductionmentioning

confidence: 99%

Methanol steam reforming over Co‐Cu‐Zn / γ‐Al ₂ O ₃ catalyst: Kinetic and RSM‐BBD modeling approaches

Mosayebi

2020

Int J Energy Res

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Summary To develop kinetic model for methanol steam reforming, the experiment tests at various operating conditions (ie, temperature: 180°C‐500°C, pressure: 1‐11 bar and H2O/CH3OH ratio [S/M] of 0.75‐3.75) on Co‐Cu‐Zn/γ‐Avnl2O3 catalyst. The kinetic model development relied on Langmuir‐Freundlich (LF) method. Also, three second‐order model applied by using response surface methodology‐box behnken design (RSM‐BBD) approach to predict the various responses including methanol conversion, H2 and CO yield. The deviation of kinetic model in predicting responses was 10.86% and showed good forecasting H2 yield compared to other responses. However, RSM‐BBD approach had a better ability in predicting the methanol conversion with error of 5.21% than products selectivity. The methanol conversion and CO yield were almost constant (equal zero) up to 260°C. The methanol conversion of 100% reached close to 500°C at pressures of 1 and 6 bar. An augmentation in S/M led to enhance in methanol conversion and H2 yield, while this trend for CO yield was reverse.

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“…This 2 International Journal of Electrochemistry theoretical analysis explained well the experimental observations for concentrated sulfuric acid, however, the behavior of Pt complex in perfluorosulfonic acid (PFSA) polymer electrolyte membrane, such as Nafion, remains unclear. Recently, there are some experimental studies analyzing the Pt dissolution in the PFSA environment [17][18][19][20][21][22][23]. The adsorption of PFSA polymer on Pt surface was studied by using a voltammetric fingerprinting approach and infrared reflection absorption spectroscopy [20,21].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study on Solubility from Pt Electrocatalyst and Reactivity in Electrolyte Environment of Pt Complex in PEFC

Ishimoto

Koyama

2012

International Journal of Electrochemistry

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We theoretically analyzed the formation energy and solvation free energy of Pt(II) and Pt(IV) complexes with three types of ligands(H2O,OH−,and CF3SO3 −)in electrolyte environment under the low- and high-humidity conditions to study the Pt electrocatalyst degradation and dissolution mechanisms for polymer electrolyte fuel cell. To represent the low- and high-humidity conditions in perfluorosulfonic acid (PFSA) polymer electrolyte membrane, we controlled the dielectric constant based on the experimental result. We observed general tendencies that the formation energy becomes larger while the solvation free energy becomes smaller under the low-humidity condition. The degradation of Pt complex from Pt surface is indicated to be accelerated by the adsorption of the end group of PFSA polymer side chain, on the Pt surface by comparing the desorption energies of [Pt(H2O)2(OH)3(CF3SO3)] and [Pt(H2O)2(OH)4]. The [Pt(H2O)4]2+is not formed by the proton addition reaction between Pt complexes under the low-humidity condition of PFSA environment. From the analysis of possible reaction pathways of Pt complexes, we found the influence of humidity on the reactivity of Pt complex.

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Influence of ageing in fuel cell on membrane/electrodes interfaces

Cited by 21 publications

References 26 publications

Macromolecular antioxidants for chemically durable polymer electrolyte fuel cell membranes

Macromolecular antioxidants for chemically durable polymer electrolyte fuel cell membranes

Methanol steam reforming over Co‐Cu‐Zn / γ‐Al ₂ O ₃ catalyst: Kinetic and RSM‐BBD modeling approaches

Theoretical Study on Solubility from Pt Electrocatalyst and Reactivity in Electrolyte Environment of Pt Complex in PEFC

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Influence of ageing in fuel cell on membrane/electrodes interfaces

Cited by 21 publications

References 26 publications

Macromolecular antioxidants for chemically durable polymer electrolyte fuel cell membranes

Macromolecular antioxidants for chemically durable polymer electrolyte fuel cell membranes

Methanol steam reforming over Co‐Cu‐Zn / γ‐Al 2 O 3 catalyst: Kinetic and RSM‐BBD modeling approaches

Theoretical Study on Solubility from Pt Electrocatalyst and Reactivity in Electrolyte Environment of Pt Complex in PEFC

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Methanol steam reforming over Co‐Cu‐Zn / γ‐Al ₂ O ₃ catalyst: Kinetic and RSM‐BBD modeling approaches