Sulphate-Ceria Composite Ceramics for Energy Environmental Co-Generation Technology

Abstract:

In this work ion conductivity and FC application were studied for the new type composite material based on SDC (samarium doped ceria) and Li2SO4. Significant conductivity enhancement was achieved, e.g. 10-2 – 0.4 Scm-1 for the SDC-Li2SO4 compared to 10-4 -10-2 Scm-1 for the SDC between 400 and 650°C. Some ion conductivity mechanisms were proposed correspondingly. Using the SDC-Li2SO4 composite materials as the electrolytes, we achieved high performances, 200-540 mWcm-2, for intermediate temperature (450-650°C) solid oxide FC (ITSOFC) applications. Sulfates, typically Li2SO4, have an excellent chemical stability in sulfur containing atmosphere. The sulfate-ceria (SDC-Li2SO4) composite materials can thus meet the demands to develop the sulfur tolerant and H2S FC technologies, which was also demonstrated successfully with significant importance for both fundamental and applied research.

• Periodical: Key Engineering Materials (Volumes 280-283)
• Pages: 425-430
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.280-283.425
• Online since: February 2007
• Authors: Xiang Rong Liu, Bin Zhu, Jin Rui Xu, Jun Cai Sun, Z.Q. Mao
• Keywords: Composite, FC, H⁺ Conduction, Li₂SO₄, O^2- Conduction, Samarium Doped Ceria SDC

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