Improved ceramic anodes for SOFCs with modified electrode/electrolyte interface

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• 作者：A. Mohammed Hussain ; ^{abhu@risoe.dtu.dk} ; ^{uzzain@gmail.com} ; Jens V.T. Hø ; gh ; Wei Zhang ; Eugen Stamate ; Karl T.S. Thydé ; n ; Nikolaos Bonanos
• 关键词：Metal functional layer ; Palladium nanoparticles ; Electrode/electrolyte interface ; Pd&ndash ; CGO electrocatalysts ; Infiltrations ; Low temperature SOFC anodes
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：15 August, 2012
• 卷：212
• 期：Complete
• 页码：247-253
• 文件大小：1052 K

摘要

The electrode performance of solid oxide fuel cell anode with Pd nanoparticles at the interface of ScYSZ electrolyte and Sr_0.94Ti_0.9Nb_0.1O₃ (STN) electrode introduced in the form of metal functional layer have been investigated at temperatures below 600聽掳C. A metal functional layer consisting of Pd was deposited by magnetron sputtering. Effecting from heat treatments, Pd nanoparticles with particle sizes in the range of 5-20聽nm were distributed at the interface, and throughout the backbone. The polarization resistance of the modified STN reduced to 30聽惟cm² at 600聽掳C, which is three times less than an unmodified STN backbone. In order to improve the anode performance further, Pd and Gd-doped CeO₂ electrocatalysts were infiltrated into the STN backbone. The modified interface with Pd nanoparticles in combination with nanostructured electrocatalyst by infiltration resulted in polarisation resistances of 0.35聽惟cm² at 600聽掳C in H₂/3%H₂O fuel.