C232 Quantification of 3D Electrode Porous Micro structure of SOFCs and Evaluation of Conventional Porous Model Based on Contiguity Theory

Abstract

Microstructural parameters of SOFC porous anode are quantified with two different methods: random walk diffusion simulation and the concept of contiguity. The concept of contiguity is a conventional porous model which estimates a 3D porous structure based on 2D cross-sectional images. We try to check the validity of the model by comparing it with the direct quantification method based on a real 3D structure. It is found that concept of contiguity can be applied to the phase with relatively high volume fraction. If volume fraction is lower than the percolation threshold, it tends to underestimate the complexity of the phase.