期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 159, 期 3, 页码 B299-B307出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.068203jes
关键词
-
资金
- U.S. Department of Education [P200A100145]
- National Science Foundation [1066623, DMR-0722845]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1066623] Funding Source: National Science Foundation
Due to the minute length scales and heterogeneous nature of fuel cell components, experimental quantification of the key properties of these materials can be expensive and quite difficult to conduct, if not impossible. The objective of this work is to introduce 3-D microstructure analysis tools for direct quantification of the key structure-related transport measures of porous fuel cell materials. Two important microstructure analysis tools are presented for the evaluation of tortuosity and void (i.e., pore) size distribution. The first tool is aimed at quantification of the tortuosity distribution in an internal structure using a shortest path search method. The second tool is aimed at quantification of orientation-resolved chord length distributions of a phase (e.g., void, solid) in a given 3-D microstructure dataset to extract the orientation and size related statistics of a selected phase. Various other key structure metrics (e.g, phase-specific volume fraction, phase connectivity, internal surface area etc.) are also successfully extracted by using these tools. Additionally, a 3-D diffusion model is presented to determine the effective structural diffusivity coefficient based on the measured microstructure. For demonstration purposes, these methods are applied to the measured microstructure datasets of the micro-porous layer of a polymer electrolyte fuel cell. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.068203jes] All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据