• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Three-dimensional morphology of the interface between micro porous layer and catalyst layer in a polymer electrolyte membrane fuel cell
【24h】

Three-dimensional morphology of the interface between micro porous layer and catalyst layer in a polymer electrolyte membrane fuel cell

机译：聚合物电解质膜燃料电池微多孔层与催化剂层界面的三维形态

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Interfaces between the different layers in proton exchange membrane fuel cells are expected to influence transport properties and therefore cell performance. So far the interface between micro porous layer (MPL) and catalyst layer (CL) has been difficult to investigate due to its nanometer scale morphology. We apply focused ion beam scanning electron microscopy tomography with pore contrasting via atomic layer deposition to reconstruct a representative volume of 5.1 mu m x 1.5 mu m x 4.5 mu m containing CL, MPL and their interface. We find that platinum in the CL results in brighter SEM image intensities, compared to the MPL. This allows (i) estimating the extension of the interfacial region (530 nm), (ii) evaluating Pt-content homogeneity in the CL and (iii) calculating the individual roughnesses for the CL (102 nm) and for the MPL (129 nm). We further calculate porosity, pore sizes, and oxygen diffusivities. Thus, we find that the values of the parameters of the interfacial region are between those of the CL and the MPL, meaning that on the investigated scale, the interface is a homogeneous transitional region. A representativeness analysis shows that our reconstructed volume is sufficiently large concerning all calculated parameters.
机译：预期质子交换膜燃料电池中不同层之间的界面受到影响性质，因此是细胞性能。到目前为止，由于其纳米级形态，微多孔层（MPL）和催化剂层（CL）之间的界面难以研究。我们将聚焦离子束扫描电子显微镜断层扫描与孔对比通过原子层沉积，以重建含有Cl，MPL及其界面的5.1μm×1.5μm×4.5μm的代表体积。我们发现CL中的铂金导致与MPL相比亮的SEM图像强度。这允许（i）估计界面区域（530nm），（ii）评估Cl和（iii）中的pt-含量均匀性的延伸，计算Cl（102nm）和mpl（129nm）的单独粗糙度（129nm ）。我们进一步计算孔隙率，孔径和氧气扩散性。因此，我们发现界面区域的参数的值在CL和MPL的那些之间，这意味着在研究中，界面是均匀的过渡区域。代表性分析表明，我们的重建量足够大，关于所有计算的参数。

著录项

  • 来源
    《RSC Advances》 |2016年第84期|共6页
  • 作者

    Zielke L.; Vierrath S.; Moroni R.; Mondon A.; Zengerle R.; Thiele S.;

  • 作者单位

    Univ Freiburg Dept Microsyst Engn IMTEK Lab MEMS Applicat Georges Koehler Allee 103 D-79110 Freiburg Germany;

    Univ Freiburg Dept Microsyst Engn IMTEK Lab MEMS Applicat Georges Koehler Allee 103 D-79110 Freiburg Germany;

    Univ Freiburg Dept Microsyst Engn IMTEK Lab MEMS Applicat Georges Koehler Allee 103 D-79110 Freiburg Germany;

    Fraunhofer Inst Solar Energy Syst ISE Div Energy Technol Heidenhofstr 2 D-79110 Freiburg Germany;

    Univ Freiburg Dept Microsyst Engn IMTEK Lab MEMS Applicat Georges Koehler Allee 103 D-79110 Freiburg Germany;

    Univ Freiburg Dept Microsyst Engn IMTEK Lab MEMS Applicat Georges Koehler Allee 103 D-79110 Freiburg Germany;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号