期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 38, 期 11, 页码 4272-4280出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.12.144
关键词
Tubular solid oxide cells; Steam electrolysis; Gas diffusion resistance; Polarization resistance
资金
- Ministry of Science and Technology of China by High Technology Development Project (863) [2011AA050702]
- Science and Technology Commission of Shanghai Municipality [09DZ1206600]
- National Natural Science Foundation of China [51071169]
Hydrogen electrode-supported tubular solid oxide cells (SOCs) were fabricated by dip-coating and co-sintering method. The electrochemical properties of tubular SOCs were investigated both in fuel cell and electrolysis modes. Ni-YSZ was employed as hydrogen electrode support. The pore ratio of Ni-YSZ support strongly affected the performance of tubular SOCs, especially in steam electrolysis mode. The pore ratio was adjusted by the content of pore-former in support slurry. The results showed that 3 wt.% pore former content is the proper value to produce high performance both in fuel cell and electrolysis modes. In fuel cell mode, the maximum power density reached 743.1 mW cm(-2) with H-2 (105 sccm) and O-2 (70 sccm) as working gases at 850 degrees C. In electrolysis mode, as the electrolysis voltage was 1.3 V, the electrolysis current density reached 425 mA cm(-2) with H-2 (35 sccm) and N-2 (70 sccm) adsorbed 47% steam as working gases in hydrogen electrode at 850 degrees C. The stability of tubular SOCs was related to the ratio of NiO/YSZ in the support. The sample with NiO/YSZ = 60/40 shows a better performance than the sample with NiO/YSZ = 50/50. Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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