Electrochemically Active Thickness of Solid Oxide Fuel Cell Electrodes: Effectiveness Model Prediction

Bulletin of the Korean Chemical Society

Jin Hyun Nam¹ 

[1] School of Mechanical Engineering Daegu University Gyungsan 38453 Korea

关键词: Solid oxide fuel cell;    Electrochemically active thickness;    Electrochemical reaction/charge conduction problem;    Active reaction layer;    Butler–;    Volmer reaction kinetics;   

DOI  :  10.1002/bkcs.11116

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The three‐phase boundaries (TPBs) in the electrodes of solid oxide fuel cells (SOFCs) have different activity because of the distributed nature of the electrochemical reactions. The electrochemically active thickness (EAT) is a good measure to evaluate the extension of the active reaction zone into the electrode and the effective utilization of TPBs. In this study, an electrochemical reaction/charge conduction problem is formulated based on the Butler–Volmer reaction kinetics and then numerically solved to determine the EATs for the active electrode layers of SOFCs with various microstructural, dimensional, and property parameters. Thus, the EAT data and correlations presented in this study are expected to provide useful information for designing efficient electrodes of SOFCs.

【 授权许可】

Unknown