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首页> 外文期刊>International Materials Reviews >Towards intelligent engineering of SOFC electrodes: a review of advanced microstructural characterisation techniques
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Towards intelligent engineering of SOFC electrodes: a review of advanced microstructural characterisation techniques

机译：迈向SOFC电极的智能工程：先进的微结构表征技术综述

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摘要

Solid oxide fuel cells (SOFCs) are high temperature electrochemical devices with the potential for clean and efficient power generation. The electrodes, which support the electrochemical reactions, play a vital role in determining the performance and durability of these devices. Effective electrode materials must balance a spectrum of criteria, including cost, thermal and chemical stability, electronic conductivity and catalytic activity. A number of successful electrode materials have been identified; the most widely adopted materials are composite structures providing electronic, ionic and gas phase percolation, which promotes electrochemical activity throughout the bulk of the electrode. The contiguous contact of electronic, ionic and gas phases at so called triple phase boundaries provides a direct indication of the electrochemical activity of the electrode. Improvements in tomography techniques have allowed SOFC electrode microstructures to be characterised in three dimensions, giving unprecedented access to a wealth of microstructural information on the nature of triple phase contact and percolation. With improved availability of advanced tomographic techniques, fuel cell developers are increasingly equipped to link processing routes to electrode microstructure and in turn electrochemical performance, such that the intelligent engineering of SOFC electrodes is becoming a reality. Here we review the development and application of these advanced microstructural characterisation techniques.
机译：固体氧化物燃料电池（SOFC）是高温电化学设备，具有清洁高效发电的潜力。支持电化学反应的电极在确定这些设备的性能和耐用性方面起着至关重要的作用。有效的电极材料必须权衡一系列标准，包括成本，热和化学稳定性，电子电导率和催化活性。已经鉴定出许多成功的电极材料。最广泛采用的材料是提供电子，离子和气相渗透的复合结构，可在整个电极中促进电化学活性。电子，离子和气相在所谓的三相边界处的连续接触直接指示了电极的电化学活性。层析成像技术的改进使SOFC电极微结构可以在三个维度上进行表征，从而可以前所未有地获取有关三相接触和渗滤性质的大量微结构信息。随着先进的层析成像技术的可用性的提高，燃料电池开发人员越来越有能力将处理路径链接到电极微结构，进而实现电化学性能，从而使SOFC电极的智能工程成为现实。在这里，我们回顾了这些先进的微结构表征技术的开发和应用。

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