Enhancing the properties of water and gas management for proton exchange membrane fuel cells via tailored intersected cracks in a microporous layer

Wang, Shuang; Guan, Shumeng; Zhang, Lichang; Zhou, Fen; Tan, Jun; Pan, Mu

doi:10.1016/j.jpowsour.2022.231402

Cited by 21 publications

(14 citation statements)

References 30 publications

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“…Following the deposition of the MPL slurry onto the woven GDL, cracks appear in MPL regions with weaker woven support 74 . As the catalyst layer is coated on the MPL, it may penetrate these cracks as well.…”

Section: Resultsmentioning

confidence: 99%

Large-scale physically accurate modelling of real proton exchange membrane fuel cell with deep learning

et al. 2023

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Proton exchange membrane fuel cells, consuming hydrogen and oxygen to generate clean electricity and water, suffer acute liquid water challenges. Accurate liquid water modelling is inherently challenging due to the multi-phase, multi-component, reactive dynamics within multi-scale, multi-layered porous media. In addition, currently inadequate imaging and modelling capabilities are limiting simulations to small areas (<1 mm2) or simplified architectures. Herein, an advancement in water modelling is achieved using X-ray micro-computed tomography, deep learned super-resolution, multi-label segmentation, and direct multi-phase simulation. The resulting image is the most resolved domain (16 mm2 with 700 nm voxel resolution) and the largest direct multi-phase flow simulation of a fuel cell. This generalisable approach unveils multi-scale water clustering and transport mechanisms over large dry and flooded areas in the gas diffusion layer and flow fields, paving the way for next generation proton exchange membrane fuel cells with optimised structures and wettabilities.

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Section: Resultsmentioning

confidence: 99%

Large-scale physically accurate modelling of real proton exchange membrane fuel cell with deep learning

et al. 2023

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“…The cracks are caused by the capillary shrinkage force of the slurry during the evaporation of the solvent. 43 The inset image of Figure 2 shows that the CNT hybrid films have pore sizes of 5 nm to 0.5 μm. In the case of SMF-1:0, the pore distribution reveals the micropores with lower volume in the range of 10− 17 nm.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…It should be noted that the cracks of SMF-0:1 (Figure S4a) are partly responsible for the peak. The cracks are caused by the capillary shrinkage force of the slurry during the evaporation of the solvent . The inset image of Figure shows that the CNT hybrid films have pore sizes of 5 nm to 0.5 μm.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Carbon Nanotube Hybrid Films Modified Gas Diffusion Layer for High-Performance Proton-Exchange Membrane Fuel Cells

Zhang,

Liu,

Song

et al. 2023

ACS Sustainable Chem. Eng.

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The functional gas diffusion layer (GDL), serving as a water−gas transfer control medium, significantly influences the performance of proton-exchange membrane fuel cells (PEMFCs). To improve simultaneously the water retention and gas transport rates, we present a straightforward and effective strategy to prepare carbon nanotube (CNT) hybrid films as functional interlayers in GDLs. With single-walled CNTs and multiwalled CNTs in the weight ratio of 1:1, the as-prepared GDL exhibits optimized electrochemical performance under all of the experimental cases. Especially, the current density is increased to 3.36 A cm −2 at 0.6 V under 26% relative humidity (RH) and 4.87 A cm −2 at 0.2 V under 100% RH. It is because the CNT hybrid films with hierarchical pore structures in GDLs are valid for enhancing both self-humidification and mass-transfer performance. The micropores with reasonable wettability serve as capillary vessels for absorbing water to promote the retention of moisture in the proton-exchange membrane, while the mesopores provide preferential transport pathways for reaction gas. Our results demonstrate that the CNTbased GDL may illuminate the potential application of PEMFCs.

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“…Limited by the adhesion of the substrate, the tensile stress is high enough to compete with the cohesion of the material. Under the action of tensile stress, the crack propagates in different directions and produces cracks of different shapes [14,22]. From the perspective of MPL crack size, cracks can be divided into macroscopic cracks and microscopic cracks.…”

Section: Mpl Crack Designmentioning

confidence: 99%

“…The experiment found that RICA improved the water permeability and air permeability of MPL at the same time. With the increase of RICA, the output performance of PEMFC was improved [14]. Deng et al studied how MPL cracks affect the transfer of liquid water in GDL and GC.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the effect of microporous layer crack changes on water management in gas diffusion layer of proton exchange membrane fuel cell

Chen

Wei

2023

International Journal of Heat and Mass Transfer

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Enhancing the properties of water and gas management for proton exchange membrane fuel cells via tailored intersected cracks in a microporous layer

Cited by 21 publications

References 30 publications

Large-scale physically accurate modelling of real proton exchange membrane fuel cell with deep learning

Large-scale physically accurate modelling of real proton exchange membrane fuel cell with deep learning

Hierarchical Carbon Nanotube Hybrid Films Modified Gas Diffusion Layer for High-Performance Proton-Exchange Membrane Fuel Cells

Numerical study on the effect of microporous layer crack changes on water management in gas diffusion layer of proton exchange membrane fuel cell

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