Effect of characteristics of Y2O3/ZrO2 powders on fabrication of anode-supported solid oxide fuel cells
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- 作者：Leng ; Yong Jun ; Chan ; Siew Hwa ; Khor ; Khiam Aik ; Jiang ; San Ping ; Cheang ; Philip
- 关键词：Anode-supported solid oxide fuel cell ; Sintering ; YSZ powder ; Thin-film electrolyte
- 刊名：Journal of Power Sources
- 出版年：2003
- 出版时间：May 15, 2003
- 年：2003
- 卷：117
- 期：1-2
- 页码：26-34
- 全文大小：513 K
文摘
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.