A rapid mechanical durability test for reinforced fuel cell membranes

Alavijeh, Alireza Sadeghi; Bhattacharya, Sandeep; Thomas, Owen; Chuy, Carmen; Kjeang, Erik

doi:10.1016/j.powera.2020.100010

Cited by 6 publications

(7 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Notably, after 10,000 cycles, the MEA lost only 26% of the initial power density. Thus, the Naf/BiPyPBI-0.5 membrane can be concluded to be mechanically stable under severe FC measurement conditions. , …”

Section: Resultsmentioning

confidence: 89%

“…Thus, the Naf/BiPyPBI-0.5 membrane can be concluded to be mechanically stable under severe FC measurement conditions. 65,66 ■ CONCLUSIONS A step in the direction of the real-life application of PEMFCs was realized by the fabrication of a proton conductive membrane comprising a perfluorosulfonic-acid ionomer and a BiPyPBI polymer with a high molecular weight and a nitrogen-rich backbone. The fabricated BiPyPBI-based membrane showed remarkable oxidative and mechanical stabilities with significant proton conduction over a wide range of operating temperatures (40 to 140 °C) and humidities (30 to 90% RH).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Promising Membrane for Polymer Electrolyte Fuel Cells Shows Remarkable Proton Conduction over Wide Temperature and Humidity Ranges

Berber

Ismail

Pourkashanian

et al. 2021

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

A step in the direction of the real-life application of fuel cells (FCs) has been realized through the fabrication of a promising proton conductive membrane comprising a perfluorosulfonic-acid ionomer and nitrogen-rich poly[2,2′-(4,4′-bipyridine)-5,5′-bibenzimidazole] (BiPyPBI). The BiPyPBI-perfluorosulfonic acid membranes displayed remarkable oxidative and mechanical stabilities with significant proton conduction over wide ranges of temperatures (40 to 140 °C) and humidities (30 to 90% RH). A 0.5 molar BiPyPBI feed ratio increased the proton conduction of perfluorosulfonic acid by 2.6- and 1.5-fold at 40 and 80 °C, respectively, due to the enhancement in the ion-exchange capacity (1.9 mmol/g, which was twofold higher than that of bare Nafion). The protonic conductivity reached 0.171 S/cm at 140 °C. Using a BiPyPBI feed increased the stability of the Nafion membrane, corresponding to a 3.5-fold increase in the mechanical stress (9.6 MPa) and a 2.2-fold decrease in the elongation at break. In addition, the oxidation stability of the Nafion membrane increased by 26%. The measured activation energy suggested that the presence of BiPyPBI created an easier proton transport pathway (by the Grotthuss mechanism) because of a stronger hydrogen-bonding network than in bare Nafion. Compared to the power density of a perfluorosulfonic-based MEA, the power density of the BiPyPBI-perfluorosulfonic-based membrane electrode assembly (MEA) at 140 °C increased by approximately 20-fold to 175 mW cm–1 at 30% RH and by approximately 5-fold to 201 mW cm–1 at 90% RH. Impedance spectra confirmed the improvement of the FC performance of the BiPyPBI-perfluorosulfonic-based MEA, indicating enhanced charge transfer. After 10,000 cycles of relative humidity stress testing, the BiPyPBI-perfluorosulfonic-based MEA showed a power density of 146 mW cm–1 (corresponding to a 16% loss in the initial power density measured at 30% RH). The MEA lost only 26% of its initial power density upon relative humidity stress cycling.

show abstract

Section: Resultsmentioning

confidence: 89%

Section: ■ Results and Discussionmentioning

confidence: 99%

Promising Membrane for Polymer Electrolyte Fuel Cells Shows Remarkable Proton Conduction over Wide Temperature and Humidity Ranges

Berber

Ismail

Pourkashanian

et al. 2021

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…It accounted that the low-current region appeared in the region where the H2O activity at the cathode catalyst layer was lower than 0.2. The H2O flowrate in the along-channel direction of the anode channel increased near the anode inlet (nodes [16][17][18][19][20] and turned to decrease until it reached below 1×10 -4 mol/s in the low-current region as shown in case 2(d). The increase in H2O flowrate near the anode inlet was caused by the H2O flow in the through-plane direction as shown in cases 1(e) and 2(e).…”

Section: Ecs Transactions 112 (4) 3-35 (2023)mentioning

confidence: 82%

“…After substituting Eqs. [20] to Eq. [19], the discretized expression of simultaneous differential equations about 𝑃 𝑖 CH 𝑘 is derived for the mass balance of gas component i at k-th node of the anode and cathode channels as follows: 𝑘 𝑘 ′ and 𝑘 (𝑘, 𝑘 ′ ∈ , , , , are the elements of the coefficient and constant terms of the linearized expression of the differential equations for gas component i. 𝑃 𝑖 𝑘 is updated by solving Eq.…”

Section: Mass Balance Model 𝑃 𝑖mentioning

confidence: 99%

“…In recent, the degradation amounts of the fuel cell materials such as the platinum, carbon support, and polymer electrolyte membrane after a long-term durability test have been investigated with a commercial FCEV (8). It is reported that the degradation of the fuel cell materials are affected considerably by the states surrounding the fuel cell materials such as the humidity and the concentration of the H2 and O2 in MEA as well as the polarization states ( 9)- (20). Following such investigations, further extension of the current fuel cell model by adding the functionalities of the distribution analysis is strongly demanded.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the Distribution of the Mass Transport and Reaction　Rates in a Fuel Cell By the Integrated Fuel Cell System Simulator Including the Dynamics of Air, H₂, and Cooling Systems

Hasegawa,

Kim,

Ikogi

et al. 2023

ECS Trans.

View full text Add to dashboard Cite

A 1+1D model to estimate the distribution of the mass transport and reaction rates in the through-plane and along-channel directions in a fuel cell (FC) was developed. The developed model was integrated to the FC system model and controllers which reproduce the dynamics of the 2nd-generation MIRAI, state-of-the-art fuel cell electric vehicle (FCEV). The dynamic behavior of the distribution of mass transport and reaction rates are investigated in low to high load and temperature conditions with the integrated simulator. It was shown that the H2O recirculation from the cathode outlet to inlet region inside the cell through the anode channel played an important role to the determination of the distribution. It was unique feature with the FC system without a humidifier in the air system and the counter-flow configuration of a fuel cell. The impacts of the specification of the controller in the H2 and air system on the overall system performance and the dynamic behavior of the distribution in a fuel cell. The increase of the anode inlet flowrate and cathode inlet pressure enhanced the H2O recirculation in the cell and improved the intensively nonuniform distribution of the humidity, which can cause the acceleration of mechanical degradation of the MEA. The tradeoff of the change of the controller specifications were assessed. It was demonstrated that the relationships among the specification of the controller, the overall system performance, and the dynamic behavior of the distribution in a fuel cell can be evaluated quantitatively.

show abstract

Water electrolysis using fluorine-free, reinforced sulfo-phenylated polyphenylene membranes

Egemole,

Biancolli,

Holdcroft

2024

Electrochimica Acta

View full text Add to dashboard Cite

A rapid mechanical durability test for reinforced fuel cell membranes

Cited by 6 publications

References 21 publications

Promising Membrane for Polymer Electrolyte Fuel Cells Shows Remarkable Proton Conduction over Wide Temperature and Humidity Ranges

Promising Membrane for Polymer Electrolyte Fuel Cells Shows Remarkable Proton Conduction over Wide Temperature and Humidity Ranges

Investigation of the Distribution of the Mass Transport and Reaction　Rates in a Fuel Cell By the Integrated Fuel Cell System Simulator Including the Dynamics of Air, H₂, and Cooling Systems

Water electrolysis using fluorine-free, reinforced sulfo-phenylated polyphenylene membranes

Contact Info

Product

Resources

About

A rapid mechanical durability test for reinforced fuel cell membranes

Cited by 6 publications

References 21 publications

Promising Membrane for Polymer Electrolyte Fuel Cells Shows Remarkable Proton Conduction over Wide Temperature and Humidity Ranges

Promising Membrane for Polymer Electrolyte Fuel Cells Shows Remarkable Proton Conduction over Wide Temperature and Humidity Ranges

Investigation of the Distribution of the Mass Transport and Reaction Rates in a Fuel Cell By the Integrated Fuel Cell System Simulator Including the Dynamics of Air, H2, and Cooling Systems

Water electrolysis using fluorine-free, reinforced sulfo-phenylated polyphenylene membranes

Contact Info

Product

Resources

About

Investigation of the Distribution of the Mass Transport and Reaction　Rates in a Fuel Cell By the Integrated Fuel Cell System Simulator Including the Dynamics of Air, H₂, and Cooling Systems