A new symmetric solid oxide fuel cell with a samaria-doped ceria framework and a silver-infiltrated electrocatalyst

Journal of Power Sources, Volume 197, 1 January 2012, Pages 57-64

A new symmetric solid oxide fuel cell with a samaria-doped ceria framework and a silver-infiltrated electrocatalyst

Ye Lin (a), Chao Su (a), Cheng Huang (a), Ju Sik Kim (b), Chan Kwak (b), Zongping Shao (a)

shaozp@njut.edu.cn

a State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry & Chemical Engineering, Nanjing University of Technology, No. 5 Xin Mofan Road, Nanjing 210009, PR China

b R&D Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 416 Maetan-Dong, Yeongtong-Gu, Suwon, Gyeonggi-Do 443-742, Republic of Korea

Abstract

For the first time a new symmetric SOFC with an SDC framework and a silver-infiltrated electrocatalyst is presented.

A three-electrode polarization test shows that the Ag–SDC has a low area specific resistance of 1.07 Ω cm2 at 600 °C, a low activation energy of 85 kJ mol−1 and high exchange current densities of 428.2 and 129.0 mA cm−2 at 750 and 650 °C, respectively, when it is used as an oxygen reduction electrode.  Results indicate that Ag–SDC|SDC|Ag–SDC symmetric cells with an infiltrated silver electrocatalyst are a promising new type of fuel cell for use with both hydrogen fuel and carbon-containing fuels.

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