Performance enhancement in a H2/O2 PEMFC with dual-ejector recirculation

Liu, Yang; Tu, Zhengkai; Chan, Siew Hwa

doi:10.1016/j.ijhydene.2022.02.023

Cited by 42 publications

(6 citation statements)

References 55 publications

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“…Proton exchange membrane fuel cells (PEMFCs) have attracted wide interest with the development of hydrogen energy. − The PEMFC is regarded as a clean and efficient energy conversion technology, which converts chemical energy into electricity with zero/low emissions. − In a typical PEMFC, hydrogen molecules are fed into the anode and catalyzed into protons, while electrons transport through the external circuit to the cathode. After transporting across the proton exchange membrane (PEM), protons react with oxygen molecules and electrons in the cathode with water as the only by-product. , The PEM, as the core component in fuel cells, has a critical impact on the Columbic efficiency and power density.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of Crystalline Porous Frameworks for Intermediate-Temperature Proton Conduction

et al. 2023

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Proton exchange membranes (PEMs), especially for work under intermediate temperatures (100–200 °C), have attracted great interest because of the high CO toleration and facial water management of the corresponding proton exchange membrane fuel cells (PEMFCs). Traditional polymer PEMs faced challenges of low stability and proton carrier leaking. Crystalline porous materials, such as metal–organic frameworks (MOFs) and covalent organic frameworks (COFs), are promising to overcome these issues contributed by nanometer-sized channels. Herein we summarized the recent development of MOF/COF-based intermediate-temperature proton conductors. The strategies of framework engineering and pore impregnation were introduced in detail for raising proton conductivity. The proton-conducting mechanism was described as well. This spotlight will provide new insight into the fabrication of MOF/COF proton conductors under intermediate-temperature and anhydrous conditions.

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Section: Introductionmentioning

confidence: 99%

Recent Progress of Crystalline Porous Frameworks for Intermediate-Temperature Proton Conduction

et al. 2023

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“…Herein, J is the volumetric transfer current density for anode and cathode reactions (A m −3 ) [35]. It should be noted that the equation here is a simple Bernardi-Verbrugge formulation, neglecting the concentration dependence and thermodynamic consistency of the electrode kinetics, not a standard Butler-Volmer equation.…”

Section: ∇ • (σmentioning

confidence: 99%

Modeling and Experimental Investigation of the Anode Inlet Relative Humidity Effect on a PEM Fuel Cell

Zhang

Liu

et al. 2022

Energies

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External humidification has been used as a flexible water management strategy for the proton exchange membrane fuel cell (PEMFC). To study the anode inlet relative humidity (ARH) effect on the performance of PEMFC, the anode inlet water content (AIWC) model is established, including condensation rates and water activity. A comparable analysis between the AIWC model, Fluent model and experiment is conducted at 60 °C operating temperature, four different anode relative humidities (25%, 50%, 75% and 100%), and 100% cathode relative humidity (CRH). The species distributions of water content and hydrogen concentration are presented and analyzed. The results show the relative error of the voltage results derived from the AIWC model has been reduced by 3.2% (the original is 4.6% in the Fluent model) especially at 240 mA·cm−2 for 50% ARH. An increase in hydrogen humidity can improve the PEMFC output at low ARH (25% and 50%). Meanwhile, at high ARH (100%), the excess water produced does not play a positive role. At 50% ARH, the water content and hydrogen distribution are more uniform all over the anode channels.

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“…The electric quantity per square meter ( q e ) produced by electrochemical reaction was used to estimate the liquid water formation characteristics, and the effects of ejector operating conditions on the performance of PEMFC were conducted. The results showed that liquid water was concentrated at the edge channel of the flow field area, and significant performance improvement of PEMFC can be achieved by increasing the operating pressure [11, 12]. A coupled electrochemical thermal model for simulating the dynamic characteristic of air‐cooled low‐temperature proton exchange membrane fuel cell stack with metallic bipolar plate was presented, and the impact of the applied metallic bipolar plate on the stack thermal balance was considered.…”

Section: Introductionmentioning

confidence: 99%

Chemical aging of sealing gasket of proton exchange membrane fuel cell

Wei

Zhang

2023

Fuel Cells

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As the key sealing part of proton exchange membrane fuel cell (PEMFC), the gasket is easily damaged in acidic solution and wet air for a long time in PEMFC, resulting in unsafe and unstable operation of PEMFC. In this paper, the regular solution (RS) and accelerated durability test (ADT) solution in PEMFC were prepared to study the aging damage process of silicone rubber gasket, and the attenuated total reflection Fourier transform infrared spectrometer (ATR‐FTIR) was used to analyze the surface changes of gaskets soaked in solutions. The results showed that the weight loss of samples increased with the soaking time in both ADT solution and RS solution, and the damage of samples in ADT solution was faster and more serious than that in RS solution. Meanwhile, the microstructure diagram also indicated that the damage of the samples in ADT solution was more serious than that in the RS solution. The ATR‐FTIR analysis results showed that the intensity of characteristic wave peaks of samples at 706, 787, 867, 1006, 1071, 1260, and 2961cm−1 in ADT solution decreased faster than that in RS solution, which was consistent with the results of weight analysis and microstructure analysis.

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Performance enhancement in a H2/O2 PEMFC with dual-ejector recirculation

Cited by 42 publications

References 55 publications

Recent Progress of Crystalline Porous Frameworks for Intermediate-Temperature Proton Conduction

Recent Progress of Crystalline Porous Frameworks for Intermediate-Temperature Proton Conduction

Modeling and Experimental Investigation of the Anode Inlet Relative Humidity Effect on a PEM Fuel Cell

Chemical aging of sealing gasket of proton exchange membrane fuel cell

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