Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell

Li, Sida; Wei, Xuezhe; Dai, Haifeng; Yuan, Hao; Ming, Pingwen

doi:10.1016/j.isci.2021.103576

Cited by 7 publications

(3 citation statements)

References 49 publications

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“…The electrical resistance, obtained from the slope, was approximately 3200 ± 140 Ω cm 2 (Figure S17). , …”

Section: Resultsmentioning

confidence: 99%

“…51 The electrical resistance, obtained from the slope, was approximately 3200 ± 140 Ω cm 2 (Figure S17). 52,53 To demonstrate the applicability of the keratin-M membrane in hydrogen fuel cells, we assembled the membrane into a commercial fuel cell setup. With hydrogen and air as the respective fuels at the anode and cathode, the cell was able to generate power to turn on both red and white LED lamps (Figure S18).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Renewable Energy from Livestock Waste Valorization: Amyloid-Based Feather Keratin Fuel Cells

Soon,

Peydayesh,

de Wild

et al. 2023

ACS Appl. Mater. Interfaces

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Increasing carbon emissions have accelerated climate change, resulting in devastating effects that are now tangible on an everyday basis. This is mirrored by a projected increase in global energy demand of approximately 50% within a single generation, urging a shift from fossil-fuel-derived materials toward greener materials and more sustainable manufacturing processes. Biobased industrial byproducts, such as side streams from the food industry, are attractive alternatives with strong potential for valorization due to their large volume, low cost, renewability, biodegradability, and intrinsic material properties. Here, we demonstrate the reutilization of industrial chicken feather waste into proton-conductive membranes for fuel cells, protonic transistors, and water-splitting devices. Keratin was isolated from chicken feathers via a fast and economical process, converted into amyloid fibrils through heat treatment, and further processed into membranes with an imparted proton conductivity of 6.3 mS cm −1 using a simple oxidative method. The functionality of the membranes is demonstrated by assembling them into a hydrogen fuel cell capable of generating 25 mW cm −2 of power density to operate various types of devices using hydrogen and air as fuel. Additionally, these membranes were used to generate hydrogen through water splitting and in protonic field-effect transistors as thin-film modulators of protonic conductivity via the electrostatic gating effect. We believe that by converting industrial waste into renewable energy materials at low cost and high scalability, our green manufacturing process can contribute to a fully circular economy with a neutral carbon footprint.

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“…The electrical resistance, obtained from the slope, was approximately 3200 ± 140 Ω cm 2 (Figure S17). , …”

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Renewable Energy from Livestock Waste Valorization: Amyloid-Based Feather Keratin Fuel Cells

Soon,

Peydayesh,

de Wild

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The proton exchange membrane (PEM) in fuel cells is a very important component that is used to separate the gas between the anode and cathode, ensuring effective proton conduction. However, in actual use, in addition to high proton conduction rates, there is also the phenomenon of the transmembrane permeation of gas molecules [1][2][3][4]. Due to the different gas pressures on both sides of the membrane, a small amount of gas molecules will permeate.…”

Section: Introductionmentioning

confidence: 99%

Construction of Nitrogen Content Observer for Fuel Cell Hydrogen Circuit Based on Anode Recirculation Mode

Wei

Wang³

et al. 2023

WEVJ

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The anode recirculation mode is increasingly being adopted in today’s fuel cell systems. The recycling of hydrogen gas can effectively improve fuel utilization and the wider economy. However, using the purge strategy for the recirculation exhaust has a significant impact on the operational performance and economic efficiency of fuel cell systems.Experiments have shown that, when the purge interval increases from 6 s to 10 s, the recirculation pump power increases by about 20%, the nitrogen content in the exhaust gas increases, and the stack voltage shows a 10 V attenuation. The accumulation of nitrogen permeation in the anode circuit leads to the degradation of the fuel cell performance. Therefore, it is necessary to discharge the accumulated nitrogen through the purge valve in a timely manner. However, opening the exhaust valve with excessively high frequency can result in the unreacted hydrogen being discharged, which reduces the economic efficiency of the fuel cell. This paper is based on the principle of mass conservation and models each subsystem of the anode circuit in the recirculation pump mode of the fuel cell separately, including the proportional valve model, the hydrogen consumption model of the fuel cell, the nitrogen permeation model of the fuel cell, the neural network model of the circulating pump, and the purge valve model. These submodels are integrated to construct a nitrogen content observer for the hydrogen circuit, which can estimate the nitrogen content. The accuracy of the model is validated through experimental data. The estimation error is less than 5.5%. The nitrogen content in the anode circuit can be effectively estimated, providing a model reference for purge operations and improving hydrogen utilization.

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Hydrogen crossover diagnosis for fuel cell stack: An electrochemical impedance spectroscopy based method

Wei²,

Jiang³

et al. 2022

Applied Energy

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Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell

Abstract: HighlightsAnalysis of fuel cell electrode processes under potentiostatic/ galvanostatic conditions Reinterpretation of the linear current-voltage behavior of fuel cell in voltammogramsGalvanostatic method with high accuracy for measuring hydrogen crossover

Cited by 7 publications

References 49 publications

Renewable Energy from Livestock Waste Valorization: Amyloid-Based Feather Keratin Fuel Cells

Renewable Energy from Livestock Waste Valorization: Amyloid-Based Feather Keratin Fuel Cells

Construction of Nitrogen Content Observer for Fuel Cell Hydrogen Circuit Based on Anode Recirculation Mode

Hydrogen crossover diagnosis for fuel cell stack: An electrochemical impedance spectroscopy based method

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