Standard Article

Overview of solid oxide fuel cell degradation

Advances in Electrocatalysis, Materials, Diagnostics and Durability

Performance degradation

High-temperature fuel cells

  1. H. Yokokawa

Published Online: 15 DEC 2010

DOI: 10.1002/9780470974001.f500062

Handbook of Fuel Cells

Handbook of Fuel Cells

How to Cite

Yokokawa, H. 2010. Overview of solid oxide fuel cell degradation. Handbook of Fuel Cells. .

Author Information

  1. National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan

Publication History

  1. Published Online: 15 DEC 2010

Abstract

This article summarizes the general features of the degradation behavior of those solid oxide fuel cells stacks/systems that have to meet the requirements for chemical as well as mechanical compatibilities in addition to normal requirements concerning respective cell components. Sealless tubular stacks developed for large stationary applications and exhibiting excellent durability are first analyzed (0.3%/1000 h for more than 70 000 h as cells and 0.1%/1000 h for more than 30 000 as systems). Degradation of stacks that have been designed for application in small residential cogeneration or in transportation, however, exhibits different features mainly because of differences in materials used and stack design of such new applications. This article describes the characteristic features of degradation from cell to stack levels. Finally, to obtain full understanding of degradation and to establish a well-designed solid oxide fuel cells (SOFC) control system, there is a discussion on what is to be realized and what is to be overcome.

Keywords:

  • degradation;
  • durability;
  • reliability;
  • long-term stability;
  • failure mode;
  • electric short;
  • impurity;
  • Cr poisoning;
  • S poisoning;
  • carbon deposition;
  • metal dust;
  • anomalous oxidation;
  • deterioration;
  • performance degradation;
  • voltage loss