Effects of anode and electrolyte microstructures on performance of solid oxide fuel cells

Sun Dong Kim, Jong Jin Lee, Hwan Moon, Sang Hoon Hyun, Jooho Moon, Joosun Kim, Hae Weon Lee

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

To improve the performance of anode-supported solid oxide fuel cells (SOFCs), various types of single cells are manufactured using a thin-film electrolyte of Yttria stabilized zirconia (YSZ) and an anode functional layer composed of a NiO-YSZ nano-composite powder. Microstructural/electrochemical analyses are conducted. Single-cell performances are highly dependent on electrolyte thickness, to the degree that the maximum power density increases from 0.74 to 1.12 W cm-2 according to a decrease in electrolyte thickness from 10.5 to 6.5 μm at 800 °C. The anode functional layer reduced the polarization resistance of a single cell from 1.07 to 0.48 Ω cm2 at 800 °C. This is attributed to the provision by the anode layer of a highly reactive and uniform electrode microstructure. It is concluded that optimization of the thickness and homogeneity of component microstructure improves single-cell performances.

Original languageEnglish
Pages (from-to)265-270
Number of pages6
JournalJournal of Power Sources
Volume169
Issue number2
DOIs
Publication statusPublished - 2007 Jun 20

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this