Current density and catalyst-coated membrane resistance distribution of hydro-formed metallic bipolar plate fuel cell short stack with 250 cm2 active area
| Autor: | Stefan Haase, Krzysztof Jozwiak, Julian Arndt Hirschfeld, M. Moser |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment 020209 energy Analytical chemistry Energy Engineering and Power Technology Proton exchange membrane fuel cell 02 engineering and technology engineering.material Conductivity Coating 0202 electrical engineering electronic engineering information engineering engineering Gravimetric analysis Coated membrane Electrical and Electronic Engineering Physical and Theoretical Chemistry Composite material Ohm Current density Power density |
| Zdroj: | Journal of Power Sources. 301:251-260 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2015.09.118 |
| Popis: | An automotive fuel cell with an active area of 250 cm 2 is investigated in a 4-cell short stack with a current and temperature distribution device next to the bipolar plate with 560 current and 140 temperature segments. The electrical conductivities of the bipolar plate and gas diffusion layer assembly are determined ex-situ with this current scan shunt module. The applied fuel cell consists of bipolar plates constructed of 75-μm-thick, welded stainless-steel foils and a graphitic coating. The electrical conductivities of the bipolar plate and gas diffusion layer assembly are determined ex-situ with this module with a 6% deviation in in-plane conductivity. The current density distribution is evaluated up to 2.4 A cm −2 . The entire cell's investigated volumetric power density is 4.7 kW l −1 , and its gravimetric power density is 4.3 kW kg −1 at an average cell voltage of 0.5 V. The current density distribution is determined without influencing the operating cell. In addition, the current density distribution in the catalyst-coated membrane and its effective resistivity distribution with a finite volume discretisation of Ohm's law are evaluated. The deviation between the current density distributions in the catalyst-coated membrane and the bipolar plate is determined. |
| Databáze: | OpenAIRE |
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