2019
DOI: 10.1002/er.4537
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Dynamic characteristics of internal current during startups/shutdowns in proton exchange membrane fuel cells

Abstract: Summary Studying dynamic characteristics of proton exchange membrane fuel cells (PEMFCs) during startups/shutdowns is of great importance to proposing strategies to improve fuel cell performance and durability. In this study, internal current during startup and shutdown processes in PEMFC is investigated, and effects of gas supply/shutoff sequences and backpressure are analyzed by measuring local current densities and the cell voltage in situ. The experimental results show that when reactants were fed/shut off… Show more

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Cited by 9 publications
(8 citation statements)
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References 47 publications
(76 reference statements)
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“…Proton exchange membrane fuel cells (PEMFCs) are an alternative technology for internal combustion engines because of their low emission profiles, extraordinary energy density, ease of operation, and swift startup/ shutdown times. [1][2][3][4] In PEMFCs, polymer electrolyte membranes (PEMs) perform a crucial role to determine the overall energy efficiency of a system. 5 The ideal PEM should have good proton conduction and low electronic conductivity with excellent chemical, thermal, and mechanical stabilities.…”
Section: Introductionmentioning
confidence: 99%
“…Proton exchange membrane fuel cells (PEMFCs) are an alternative technology for internal combustion engines because of their low emission profiles, extraordinary energy density, ease of operation, and swift startup/ shutdown times. [1][2][3][4] In PEMFCs, polymer electrolyte membranes (PEMs) perform a crucial role to determine the overall energy efficiency of a system. 5 The ideal PEM should have good proton conduction and low electronic conductivity with excellent chemical, thermal, and mechanical stabilities.…”
Section: Introductionmentioning
confidence: 99%
“…Many studies have been performed in the modeling field and dynamic behavior of PEM fuel cells. These include the reduced‐order dynamic model, 9 the PEMFC optimal parameter estimate, 10 the PEMFC pressure drop modeling, 11 the startups‐shutdowns modeling, 12 and the dynamic multiphase model 13 . Similar research has been performed on the selection of alternative materials and membrane 14,15 .…”
Section: Introductionmentioning
confidence: 99%
“…At present, although fuel cell technology has been greatly improved, durability is still one of the key issues restricting the commercialization of PEMFC vehicles [1][2][3]. Especially in the shut-down or start-up process of the PEMFC, the air entered into the anode chamber can form the hydrogen/air interface, accelerating the carbon corrosion of the catalytic layer [4][5][6][7][8][9][10][11][12][13]. The corrosion mechanism caused by the hydrogen/air interface is expressed as follow:…”
Section: Introductionmentioning
confidence: 99%
“…Meanwhile, the research on control strategies to mitigate carbon corrosion is also significant which can prolong the life of the PEMFC. Generally, the mitigation strategies are mainly divided into the improvement of electrode catalyst support materials [4,[22][23][24][25] and system control strategies [5,[7][8][9][10]12,13,20,22,[26][27][28][29][30].…”
Section: Introductionmentioning
confidence: 99%