Surface engineering of bipolar plate materials for better water management
    7.
    发明授权
    Surface engineering of bipolar plate materials for better water management 有权
    双极板材料的表面工程,以实现更好的水处理

    公开(公告)号:US07897295B2

    公开(公告)日:2011-03-01

    申请号:US11313161

    申请日:2005-12-20

    IPC分类号: H01M8/04

    摘要: A flow field plate or bipolar plate for a fuel cell, where a surface of the flow field plate is textured or roughened to change the surface morphology of the plate. A conductive coating is deposited on the roughened surface where the roughness of the surface of the plate increases the hydrophilic nature of the coating. Therefore, if the coating is naturally hydrophobic, the surface roughness makes the coating hydrophilic to wick water away. If the coating is a conductive hydrophilic coating, then the surface roughness makes the coating super-hydrophilic, and may counter the effects of surface contamination that would act to make the hydrophilic coating less hydrophilic.

    摘要翻译: 用于燃料电池的流场板或双极板,其中流场板的表面被纹理化或粗糙化以改变板的表面形态。 导电涂层沉积在粗糙表面上,其中板的表面的粗糙度增加了涂层的亲水性。 因此,如果涂层是天然疏水性的,则表面粗糙度使得涂层具有亲水性以吸水。 如果涂层是导电亲水涂层,则表面粗糙度使得涂层具有超亲水性,并且可以抵消表面污染的作用,从而使亲水涂层的亲水性降低。

    DURABLE LAYER STRUCTURE AND METHOD FOR MAKING SAME
    9.
    发明申请
    DURABLE LAYER STRUCTURE AND METHOD FOR MAKING SAME 审中-公开
    耐久层结构及其制造方法

    公开(公告)号:US20080044716A1

    公开(公告)日:2008-02-21

    申请号:US11464844

    申请日:2006-08-16

    IPC分类号: H01M8/02 B05D1/36 B05D5/12

    摘要: A bipolar plate for a fuel cell that includes a hydrophilic layer deposited on the bipolar plate to a suitable thickness to satisfy hydrofluoric acid etching for the desired lifetime of the fuel cell. In one embodiment, the hydrophilic layer is a relatively thick silicon dioxide layer that is deposited on the bipolar plate as a colloidal dispersion of silicon dioxide nano-particles in a solvent. The dispersion is dried so that the solvent evaporates to form a film of the silicon dioxide nano-particles on the bipolar plate. A relatively thin layer, generally a metal oxide, is first deposited on the bipolar plate by a CVD or PVD process so that the thin layer has suitable bonding to the bipolar plate. The thicker hydrophilic layer is then deposited on the thin layer, where the bonds between the thick layer and the thin layer are suitable for the fuel cell environment.

    摘要翻译: 一种用于燃料电池的双极板,其包括沉积在双极板上的亲水层至合适的厚度,以满足氢氟酸蚀刻所需的燃料电池寿命。 在一个实施方案中,亲水层是相对厚的二氧化硅层,其作为二氧化硅纳米颗粒在溶剂中的胶态分散体沉积在双极板上。 将分散体干燥,使得溶剂蒸发以在双极板上形成二氧化硅纳米颗粒的膜。 首先通过CVD或PVD方法将相对薄的层(通常为金属氧化物)沉积在双极板上,使得薄层具有与双极板的合适的结合。 然后将较厚的亲水层沉积在薄层上,其中厚层和薄层之间的结合适用于燃料电池环境。