In operando measurements of liquid water saturation distributions and effective diffusivities of polymer electrolyte membrane fuel cell gas diffusion layers

Chevalier, S.; Lee, J.; Gao, Nan; Yip, Ronnie; Antonacci, Patrick; Tabuchi, Yuichiro; Kotaka, Toshikazu; Bazylak, Aimy

doi:10.1016/j.electacta.2016.05.180

Cited by 53 publications

(44 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous studies have linked the presence of liquid water in the GDL to mass-transport efficiency losses, both through numerical modeling efforts [19,80,83] and in-situ visualizations [17,33,39,66,84]. Recent studies [33,39,85] performing in operando visualization of liquid water have strongly supported the link between the oxygen transport resistance and the liquid water saturation within the GDL. Antonacci et al [39] investigated the feasibility of combining synchrotron X-ray radiographic measurements of liquid water with electrochemical impedance spectroscopy (EIS) characterizations of mass transport resistance.…”

Section: Effect Of Gdl Liquid Water Accumulationmentioning

confidence: 99%

“…The studies above established a qualitative link between cathode RH and liquid water accumulation, however only the studies by Chevalier et al [66] and Boillat et al [31] featured direct visualization of GDL liquid water. Neither of these two studies implemented a complete range of RH conditions (0% to 100%), and the specific impacts of cathode inlet RH were tangential to the main findings of these works.…”

Section: Effect Of Reactant Gas Relative Humidity (Rh)mentioning

confidence: 99%

“…Boillat et al [31] used neutron radiography to observe water accumulation in a PEMFC and reported that liquid water accumulation increased when the relative humidity of reactant gases increased. Chevalier et al [66] measured liquid water accumulation using synchrotron X-ray radiography and reported the significant sensitivity of liquid water saturation to relative humidity. At an operating current density of 1.5 A • cm −2 , Chevalier et al [66] observed an increase in peak local liquid water saturation from <5% to 86% when the cathode RH was varied from 25% to 100%.…”

Section: Effect Of Reactant Gas Relative Humidity (Rh)mentioning

confidence: 99%

“…Chevalier et al [66] measured liquid water accumulation using synchrotron X-ray radiography and reported the significant sensitivity of liquid water saturation to relative humidity. At an operating current density of 1.5 A • cm −2 , Chevalier et al [66] observed an increase in peak local liquid water saturation from <5% to 86% when the cathode RH was varied from 25% to 100%. In addition to the direct studies of GDL water mentioned above, numerous studies have studied PEM fuel cell liquid water accumulation in the channels via direct visualization or measurement of pressure drop [26][27][28][67][68][69][70][71][72][73].…”

Section: Effect Of Reactant Gas Relative Humidity (Rh)mentioning

confidence: 99%

See 3 more Smart Citations

Liquid water saturation and oxygen transport resistance in polymer electrolyte membrane fuel cell gas diffusion layers

Muirhead

Banerjee

George

et al. 2018

Electrochimica Acta

View full text Add to dashboard Cite

In this thesis, the relative humidity (RH) of the cathode reactant gas was investigated as a factor which influences gas diffusion layer (GDL) liquid water accumulation and mass transport-related efficiency losses over a range of operating current densities in a polymer electrolyte membrane (PEM) fuel cell. Limiting current measurements were used to characterize fuel cell oxygen transport resistance while simultaneous measurements of liquid water accumulation were conducted using synchrotron X-ray radiography. GDL porosity distributions were characterized with micro-computed tomography (μCT). The work presented here can be used by researchers to develop improved numerical models to predict GDL liquid water accumulation and to inform the design of next-generation GDL materials to mitigate mass transport-related efficiency losses. This work also contributes an extensive set of concurrent performance and liquid water visualization data to the PEM fuel cell field that can be used for validating multiphase transport models.iii

show abstract

Section: Effect Of Gdl Liquid Water Accumulationmentioning

confidence: 99%

Section: Effect Of Reactant Gas Relative Humidity (Rh)mentioning

confidence: 99%

Section: Effect Of Reactant Gas Relative Humidity (Rh)mentioning

confidence: 99%

Section: Effect Of Reactant Gas Relative Humidity (Rh)mentioning

confidence: 99%

See 2 more Smart Citations

Liquid water saturation and oxygen transport resistance in polymer electrolyte membrane fuel cell gas diffusion layers

Muirhead

Banerjee

George

et al. 2018

Electrochimica Acta

View full text Add to dashboard Cite

show abstract

“…Over recent years, a lot of efforts has been done to develop physical models for a PEMFC impedance. [3][4][5][6][7][8][9][10][11][12][13][14] Most of these models are numerical and they are slow to be used in algorithms for spectra fitting. A "faster" alternative is analytical modeling of impedance; [15][16][17][18][19][20][21][22][23] however, fast analytical models have been developed for the case of infinite stoichiometry of the air (oxygen) flow in the cathode channel.…”

mentioning

confidence: 99%

A Fast Low-Current Model for Impedance of a PEM Fuel Cell Cathode at Low Air Stoichiometry

Kulikovsky

2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

We report a physics-based analytical model for low-current PEM fuel cell impedance, which takes into account oxygen transport in the channel. The model is fast: fitting the model impedance to the experimental Nyquist spectrum takes about 2 minutes on a 2-GHz notebook. In addition to the transport and kinetic parameters of the catalyst layer, fitting returns the oxygen diffusion coefficient in the gas-diffusion layer and the resistivity due to oxygen transport in the channel. Maple worksheet with the fitting procedure is available for download.

show abstract

Exploration of operating conditions on oxygen mass transport resistance and performance of PEM fuel cells: Effects of inlet gas humidification

Reshetenko

Ben

2021

Electrochemical Science Adv

View full text Add to dashboard Cite

This work presents comprehensive studies of inlet gas humidification on O2 mass transport and proton exchange membrane fuel cell performance to obtain a better understanding of transport processes at a cathode gas diffusion electrode. The O2 mass transport resistance was determined employing our segmented cell system and a novel method based on the distribution of the spatial limiting currents using 5% vol. O2 mixtures with various balance gases from He to C3H8. Variation of the molecular weight of the balance gas resulted in the determination of O2 mass transport resistance due to Knudsen diffusion as well as diffusion and dissolution through liquid and ionomer films in a cathode catalyst layer (RK+film) and gas phase (Rm, N2). The application of a gas diffusion layer with and without a microporous layer (MPL) allowed us to separate contributions from the cathode catalyst layer (RK+film, CCL) and MPL (RMPL). The data demonstrated that RK+film, CCL significantly decreased from 92.36 to 52.83 s/m at 32 and 100% relative humidity, respectively, due to the effect of humidification on gas permeability through the ionomer. At the same time, Rm, N2 decreased slightly with gas humidification, while RMPL increased slightly. The results showed that fuel cell performance improved with a decrease in permeability mass transport overpotentials and RK+film, CCL. An analysis of the data demonstrated correlations between operating conditions, the mass transport parameters of the cathode gas diffusion electrodes, fuel cell performance, and voltage losses.

show abstract

In operando measurements of liquid water saturation distributions and effective diffusivities of polymer electrolyte membrane fuel cell gas diffusion layers

Cited by 53 publications

References 54 publications

Liquid water saturation and oxygen transport resistance in polymer electrolyte membrane fuel cell gas diffusion layers

Liquid water saturation and oxygen transport resistance in polymer electrolyte membrane fuel cell gas diffusion layers

A Fast Low-Current Model for Impedance of a PEM Fuel Cell Cathode at Low Air Stoichiometry

Exploration of operating conditions on oxygen mass transport resistance and performance of PEM fuel cells: Effects of inlet gas humidification

Contact Info

Product

Resources

About