Thermal conductivity and contact resistance of compressed gas diffusion layer of PEM fuel cell

Iwao Nitta (Corresponding Author), Olli Himanen, Mikko Mikkola

    Research output: Contribution to journalArticleScientificpeer-review

    73 Citations (Scopus)

    Abstract

    This paper discusses the effect of compression pressure on the mechanical and thermal properties of gas diffusion layers (GDL). The stress–strain curve of the GDL revealed one nonlinear and two piecewise linear regions within the compression pressure range of 0–5.5 MPa. The thermal conductivity of the compressed GDL seems to be independent of the compression pressure and was determined to be 1.18 ± 0.11 W m–1 K–1 at room temperature. The thermal contact resistance between the GDL and graphite was evaluated by augmenting experiments with computer modelling. The thermal contact resistance decreased nonlinearly with increasing compression pressure. According to the results here, the thermal bulk resistance of the GDL is comparable to the thermal contact resistance between the GDL and graphite. A simple one‐dimensional model predicted a temperature drop of 1.7–4.4 °C across the GDL and catalyst layer depending on compression pressures.
    Original languageEnglish
    Pages (from-to)111 - 119
    Number of pages9
    JournalFuel Cells
    Volume8
    Issue number2
    DOIs
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Diffusion in gases
    Contact resistance
    Fuel cells
    Thermal conductivity
    Graphite
    Thermodynamic properties
    Mechanical properties
    Temperature
    Catalysts
    Hot Temperature

    Keywords

    • Gas diffusion layer
    • Inhomogeneous compression
    • PEM Fuel cells
    • fuel cells
    • Stress-strain curve
    • Thermal conductivity
    • Thermal contact resistance

    Cite this

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    title = "Thermal conductivity and contact resistance of compressed gas diffusion layer of PEM fuel cell",
    abstract = "This paper discusses the effect of compression pressure on the mechanical and thermal properties of gas diffusion layers (GDL). The stress–strain curve of the GDL revealed one nonlinear and two piecewise linear regions within the compression pressure range of 0–5.5 MPa. The thermal conductivity of the compressed GDL seems to be independent of the compression pressure and was determined to be 1.18 ± 0.11 W m–1 K–1 at room temperature. The thermal contact resistance between the GDL and graphite was evaluated by augmenting experiments with computer modelling. The thermal contact resistance decreased nonlinearly with increasing compression pressure. According to the results here, the thermal bulk resistance of the GDL is comparable to the thermal contact resistance between the GDL and graphite. A simple one‐dimensional model predicted a temperature drop of 1.7–4.4 °C across the GDL and catalyst layer depending on compression pressures.",
    keywords = "Gas diffusion layer, Inhomogeneous compression, PEM Fuel cells, fuel cells, Stress-strain curve, Thermal conductivity, Thermal contact resistance",
    author = "Iwao Nitta and Olli Himanen and Mikko Mikkola",
    year = "2008",
    doi = "10.1002/fuce.200700054",
    language = "English",
    volume = "8",
    pages = "111 -- 119",
    journal = "Fuel Cells",
    issn = "1615-6846",
    publisher = "Wiley",
    number = "2",

    }

    Thermal conductivity and contact resistance of compressed gas diffusion layer of PEM fuel cell. / Nitta, Iwao (Corresponding Author); Himanen, Olli; Mikkola, Mikko.

    In: Fuel Cells, Vol. 8, No. 2, 2008, p. 111 - 119.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Thermal conductivity and contact resistance of compressed gas diffusion layer of PEM fuel cell

    AU - Nitta, Iwao

    AU - Himanen, Olli

    AU - Mikkola, Mikko

    PY - 2008

    Y1 - 2008

    N2 - This paper discusses the effect of compression pressure on the mechanical and thermal properties of gas diffusion layers (GDL). The stress–strain curve of the GDL revealed one nonlinear and two piecewise linear regions within the compression pressure range of 0–5.5 MPa. The thermal conductivity of the compressed GDL seems to be independent of the compression pressure and was determined to be 1.18 ± 0.11 W m–1 K–1 at room temperature. The thermal contact resistance between the GDL and graphite was evaluated by augmenting experiments with computer modelling. The thermal contact resistance decreased nonlinearly with increasing compression pressure. According to the results here, the thermal bulk resistance of the GDL is comparable to the thermal contact resistance between the GDL and graphite. A simple one‐dimensional model predicted a temperature drop of 1.7–4.4 °C across the GDL and catalyst layer depending on compression pressures.

    AB - This paper discusses the effect of compression pressure on the mechanical and thermal properties of gas diffusion layers (GDL). The stress–strain curve of the GDL revealed one nonlinear and two piecewise linear regions within the compression pressure range of 0–5.5 MPa. The thermal conductivity of the compressed GDL seems to be independent of the compression pressure and was determined to be 1.18 ± 0.11 W m–1 K–1 at room temperature. The thermal contact resistance between the GDL and graphite was evaluated by augmenting experiments with computer modelling. The thermal contact resistance decreased nonlinearly with increasing compression pressure. According to the results here, the thermal bulk resistance of the GDL is comparable to the thermal contact resistance between the GDL and graphite. A simple one‐dimensional model predicted a temperature drop of 1.7–4.4 °C across the GDL and catalyst layer depending on compression pressures.

    KW - Gas diffusion layer

    KW - Inhomogeneous compression

    KW - PEM Fuel cells

    KW - fuel cells

    KW - Stress-strain curve

    KW - Thermal conductivity

    KW - Thermal contact resistance

    U2 - 10.1002/fuce.200700054

    DO - 10.1002/fuce.200700054

    M3 - Article

    VL - 8

    SP - 111

    EP - 119

    JO - Fuel Cells

    JF - Fuel Cells

    SN - 1615-6846

    IS - 2

    ER -