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Microstructural characterisation of SOFC electrodes: Observations and simulations

Shearing, PR, Cai, Q, Clague, R, Brandon, NP, Adjiman, C, Marquis, AJ, Gelb, J, Bradley, R and Withers, PJ (2011) Microstructural characterisation of SOFC electrodes: Observations and simulations ECS Transactions, 35 (2 PART). pp. 1367-1377.

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Abstract

SOFC electrodes are typically porous composite materials bringing ionic, electronic and pore phases into intimate contact. These electrodes must fulfill a broad range of criteria from diffusion and electrocatalysis to mechanical support and redox tolerance. Historically design and optimisation have been largely empirical and characterisation of electrode microstructures at sub-micron length scales has been restricted to two-dimensional electron microscopy. In recent years, the development and application of focused ion beam and X-ray nano tomography tools has enabled characterisation of electrode microstructures in three dimensions providing unprecedented access to a wealth of microstructural information (see e. g [1,2]). As well as improving our understanding of existing electrode geometries, these tools have also been successfully applied to evaluate design and manufacturing strategies. With improved availability and functionality of high-resolution tomography tools, we can start to explore the effects of processing and operation on microstructure and performance. Using the unique benefits of non-destructive synchrotron X-ray nano-CT, we have explored microstructural evolution processes in-situ, using so-called "4D tomography", facilitating an improved understanding of electrode aging and durability. These tomography platforms are however most powerful when used in conjunction with relevant simulation tools [3,4]. Here we present the results of finite element simulations, exploring coupled electrochemistry and transport and stress in composite SOFC electrodes, utilising experimentally derived microstructural frameworks. ©The Electrochemical Society.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
AuthorsEmailORCID
Shearing, PRUNSPECIFIEDUNSPECIFIED
Cai, QUNSPECIFIEDUNSPECIFIED
Clague, RUNSPECIFIEDUNSPECIFIED
Brandon, NPUNSPECIFIEDUNSPECIFIED
Adjiman, CUNSPECIFIEDUNSPECIFIED
Marquis, AJUNSPECIFIEDUNSPECIFIED
Gelb, JUNSPECIFIEDUNSPECIFIED
Bradley, RUNSPECIFIEDUNSPECIFIED
Withers, PJUNSPECIFIEDUNSPECIFIED
Date : 2011
Identification Number : https://doi.org/10.1149/1.3570123
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 13:23
Last Modified : 28 Mar 2017 13:23
URI: http://epubs.surrey.ac.uk/id/eprint/803938

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