Stress response and contact behavior of PEMFC during the assembly and working condition

Zhang, Jie; Hu, Yang; Han, Chuanjun; Zhang, Han

doi:10.1016/j.ijhydene.2021.06.200

Cited by 25 publications

(13 citation statements)

References 15 publications

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“…PEMFCs are subjected to several mechanical stresses due to the different assembly procedures [95] and challenging operational and environmental conditions (see Figure 11). Avoiding localized high stress and strain points is necessary for long-term durability.…”

Section: Sealing and Compression Kitsmentioning

confidence: 99%

See 1 more Smart Citation

A Review on the Long-Term Performance of Proton Exchange Membrane Fuel Cells: From Degradation Modeling to the Effects of Bipolar Plates, Sealings, and Contaminants

et al. 2022

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Proton-exchange membrane fuel cells (PEMFCs) are regarded as promising alternatives to internal combustion engines (ICEs) to reduce pollution. Recent research on PEMFCs focuses on achieving higher power densities, reducing the refueling time, mitigating the final price, and decreasing the degradations, to facilitate the commercialization of hydrogen mobility. The design of bipolar plates and compression kits, in addition to their coating, can effectively improve performance, increase durability, and support water/thermal management. Past reviews usually focused on the specific aspect, which can hardly provide readers with a complete picture of the key challenges facing and advances in the long-term performance of PEMFCs. This paper aims to deliver a comprehensive source to review, from both experimental, analytical and numerical viewpoints, design challenges, degradation modeling, protective coatings for bipolar plates, and key operational challenges facing and solutions to the stack to prevent contamination. The significant research gaps in the long-term performance of PEMFCs are identified as (1) improved bipolar-plate design and coating, (2) the optimization of the design of sealing and compression kits to reduce mechanical stresses, and (3) stack degradation regarding fuel contamination and dynamic operation.

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Section: Sealing and Compression Kitsmentioning

confidence: 99%

“…procedures [95] and challenging operational and environmental conditions (see Figur 11). Avoiding localized high stress and strain points is necessary for long-term durabi ity.…”

Section: Sealing and Compression Kitsmentioning

confidence: 99%

A Review on the Long-Term Performance of Proton Exchange Membrane Fuel Cells: From Degradation Modeling to the Effects of Bipolar Plates, Sealings, and Contaminants

et al. 2022

View full text Add to dashboard Cite

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“…Both the structure and operating conditions will greatly affect the fuel cell performance. , Establishing a cross-scale model and exploring the impact of a new structure design scheme on the internal performance of the fuel cell holds significant importance . Therefore, a compensation flow field based on the serpentine structure is proposed.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of the Compensation Flow Fields on the Performance and Thermal Stress Distribution of a Typical Fuel Cell

Zhao,

Hu,

et al. 2024

ACS Omega

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The flow field design of the proton exchange membrane fuel cell (PEMFC) had a great impact on the performance and lifespan of the cell. To improve the uniformity of the substance component inside the PEMFC, referring to the serpentine flow field, a kind of compensating flow field is designed and investigated. Under the same conditions, the homogeneity of the two flow field structures is compared, and the influence of the homogeneity of two flow field distributions on the performance of the PEMFC is further analyzed. The polarization curve, maximum pressure difference at the inlet and outlet of the flow channel, and thermal stress generated by temperature gradients are used as performance indicators for evaluating the performance of the cell. The results show that after compensation, the distribution uniformity of each component in the flow field is improved, and the power density, water management, and thermal management capabilities are better than those in the traditional flow field design. Furthermore, the thermal performance of the single-layer cell and five-layer stack was compared. The results show that the more fuel cell layers, the greater the temperature difference within the cell, which will result in greater thermal stress. In the compensation flow field, the thermal stress of a single-layer unit is 14% lower than that of a serpentine flow field, and the thermal stress of a five-layer stack is 20% lower.

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“…In any case, all the individual elements in an MEA with five-layered or threelayered structures have to be tightly clamped together under a certain pressure by adjusting the compression ratio, torque, plate pressure, and clamping force [5]. A single PEMFC unit normally generates a voltage below 1 V [6], which is far limited for practical use. To meet the requirement and achieve sufficient power, specific numbers of PEMFC units have to Membranes 2022, 12, 645 2 of 15 be assembled and packaged together under a certain pressure to form a stacked structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Clamping Compression on the Mechanical Performance of a Carbon Paper Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells

et al. 2022

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During all the assembly stages of a polymer electrolyte membrane fuel cell (PEMFC) stack, gas diffusion layers (GDLs) endure clamping loads in the through-plane direction several times. Under such complicated assembly conditions, GDLs have to deform with the changes in structure, surface roughness, pore size, etc. A comprehensive understanding of the compressive performance of GDLs at different clamping phases is crucial to the assembly process improvement of PEMFCs. Two typical clamping compression was designed and performed to get close to the actual assembly conditions of PEMFCs. The results indicate that the initial clamping compression and the magnitude of the maximum clamping load have great impacts on the segmented compressive properties of GDLs. The nonlinear compressive performance of the GDL is mainly attributed to the unique microstructural information. The rough surface morphology contributes to the initial compressive characteristics where the big strain along with the small stress occurs, and the irreversible failures such as carbon fiber breakages and adhesive failures between fibers and binders account for the hysteresis between different compression stages. Importantly, it is found that the clamping compression hardly influences the small pore distribution below 175 μm but affects the large pore distribution over 200 μm.

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Stress response and contact behavior of PEMFC during the assembly and working condition

Cited by 25 publications

References 15 publications

A Review on the Long-Term Performance of Proton Exchange Membrane Fuel Cells: From Degradation Modeling to the Effects of Bipolar Plates, Sealings, and Contaminants

A Review on the Long-Term Performance of Proton Exchange Membrane Fuel Cells: From Degradation Modeling to the Effects of Bipolar Plates, Sealings, and Contaminants

Investigating the Effect of the Compensation Flow Fields on the Performance and Thermal Stress Distribution of a Typical Fuel Cell

Effect of Clamping Compression on the Mechanical Performance of a Carbon Paper Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells

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