Effect of characteristics of Y2O3/ZrO2 powders on fabrication of anode-supported solid oxide fuel cells

Yongjun Leng, Siew Hwa Chan, Khiam Aik Khor, San Ping Jiang, Philip Cheang

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Abstract

A comparative study is carried out on the effect of nano-sized and micron-sized Y2O3/ZrO2 (YSZ) powders on the fabrication and performance of anode-supported solid oxide fuel cells. It is found that pellets made of nano-sized YSZ powder can achieve a relative density of 96% at a sintering temperature of 1400°C and 92% at sintering temperature as low as 1200°C. For pellets made of micron-sized YSZ powder, densification only occurred at a sintering temperature of 1400 °C. On co-sintering the nano-sized YSZ electrolyte film with the anode support/substrate, the electrolyte is unable to sinter fully at 1400 °C, but forms a porous structure which leads to a reduced open-circuit potential and poor cell performance. This is most likely due to the nano-sized YSZ electrolyte thin film having a very low green density and there being a significant difference in the sintering behaviour of the YSZ thin layer and the Ni/YSZ cermet substrates. The sintering behaviour and the nature of YSZ powders exert a significant effect on the fabrication and performance of Ni/YSZ anode-supported thin YSZ electrolyte cells.

Original languageEnglish (US)
Pages (from-to)26-34
Number of pages9
JournalJournal of Power Sources
Volume117
Issue number1-2
DOIs
StatePublished - May 15 2003

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

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