Determination Method of Dimensionless Moduli for Estimation of PEFC Performance

Kageyama, Masaaki; Yamaguchi, Kazuhiro; Heggo, Dalia; Ma, Yulei; Ogawa, Hikaru; Kawase, Motoaki

doi:10.1149/09809.0163ecst

Cited by 2 publications

(6 citation statements)

References 17 publications

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“…In order to obtain the value of the ORR rate and mass transfer parameters precisely, Eqs. [11], [12], and [14] derived from the mass balance should be solved without extreme assumptions.…”

Section: Discussion Of Mass Transfer Resistance From Limiting Current...mentioning

confidence: 99%

“…There are four methods to obtain dimensionless moduli (12). pOc, DeO, kvc °m or (c) dependency of the ORR rate determines dimensionless moduli and cathode parameters.…”

Section: Analysis Methodsmentioning

confidence: 99%

“…The ORR rate and transport parameters which satisfy Eqs. [11], [12], and [14] can be obtained by applying the experimental data of pOc, Ecm, and RH dependencies of the ORR rate to these equations. DeO, ep, kpO, kvc ⊕ , bc can be determined in this study.…”

Section: Analysis Methodsmentioning

confidence: 99%

“…That means these distributions in CCL and the value of Fu can be determined just by giving five dimensionless moduli in Eqs. [11], [12], and [14].…”

Section: Model and Theorymentioning

confidence: 99%

“…ORR rate and mass transfer parameters, DeO, ep, kpO, kvc ⊕ , and bc are quantified so that the polarization curves dependency on pOc and RH satisfies Eqs. [11], [12], and [14] Non-linear least square method was employed to determine these parameters. The determined results are expressed as follows:…”

Section: Quantification Of Reaction and Mass Transfer Parametersmentioning

confidence: 99%

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Quantification Method of Mass Transfer Resistance in Cathode Catalyst Layer in PEFC

Ogawa,

Okada,

Kageyama

et al. 2023

ECS Trans.

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The quantification method of mass transfer resistance in the cathode catalyst layer (CCL) should be established in order to appropriately evaluate the cell performance. Lots of PEFC research assumes that any resistances in PEFC are in series to reaction resistance. In this study, oxygen and proton transfer resistances in CCL were quantitatively separated from reaction resistance by applying the model where the through-plane mass- transport resistances were parallel to the reaction resistance. In order to evaluate oxygen and proton transfer resistance, a dimensionless cathode isothermal one-dimensional model was applied. The mass transfer resistance in CCL can be quantitatively evaluated by obtaining the value of five dimensionless moduli derived from mass balance. Polarization curves dependency on the oxygen partial pressure and relative humidity (RH) were measured at the temperature of 80 °C. Reaction rate parameters, effective oxygen diffusion coefficient, effective proton conductivity, and oxygen permeance through the ionomer layer were determined.

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“…In order to obtain the value of the ORR rate and mass transfer parameters precisely, Eqs. [11], [12], and [14] derived from the mass balance should be solved without extreme assumptions.…”

Section: Discussion Of Mass Transfer Resistance From Limiting Current...mentioning

confidence: 99%

“…There are four methods to obtain dimensionless moduli (12). pOc, DeO, kvc °m or (c) dependency of the ORR rate determines dimensionless moduli and cathode parameters.…”

Section: Analysis Methodsmentioning

confidence: 99%

Section: Analysis Methodsmentioning

confidence: 99%

“…That means these distributions in CCL and the value of Fu can be determined just by giving five dimensionless moduli in Eqs. [11], [12], and [14].…”

Section: Model and Theorymentioning

confidence: 99%

Section: Quantification Of Reaction and Mass Transfer Parametersmentioning

confidence: 99%

See 3 more Smart Citations

Quantification Method of Mass Transfer Resistance in Cathode Catalyst Layer in PEFC

Ogawa,

Okada,

Kageyama

et al. 2023

ECS Trans.

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Analysis Method of Oxygen Reduction Reaction Rate in PEFC Using Pt-Sputtered Catalyst

Ogawa¹,

Kageyama²,

Kawase³

2021

ECS Trans.

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For widespread use of polymer electrolyte fuel cell (PEFC), it is necessary to reduce the amount of platinum by optimizing the cathode catalyst layer (CCL) structure. Therefore, oxygen reduction reaction (ORR) rate which does not include the mass transfer resistance in CCL should be formulated. To measure the ORR rate which does not include the mass transfer resistance in the CCL, a thin layer electrode was prepared by directly sputtering platinum to microporous layer (MPL) on gas diffusion layer. Dependencies of ORR rate on temperature and relative humidity (RH), were measured and analyzed. From the measurement results, ORR parameters which do not include the effect of mass transfer resistance through the CCL were appropriately determined. The ORR rate and electrochemical surface area (ECSA) depend on RH and a half of RH dependency of ORR rate is ascribed to change in ECSA.

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Determination Method of Dimensionless Moduli for Estimation of PEFC Performance

Cited by 2 publications

References 17 publications

Quantification Method of Mass Transfer Resistance in Cathode Catalyst Layer in PEFC

Quantification Method of Mass Transfer Resistance in Cathode Catalyst Layer in PEFC

Analysis Method of Oxygen Reduction Reaction Rate in PEFC Using Pt-Sputtered Catalyst

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