Yonglai Dong

A high-performance anode-supported SOFC with LDC-LSGM bilayer electrolytes

An anode-supported solid oxide fuel cell (SOFC) with lanthanum-doped ceria (LDC) and strontium and magnesium doped lanthanum gallate (LSGM) bilayer electrolytes was fabricated and tested. The bilayer electrolyte thin film, consisting of a 25 mum thick LDC layer and a 75 mum thick LSGM layer, was prepared by a simple dry-pressing process. The two electrolyte layers were sintered together well, and no crack and peel-off at the interface were observed. An open-circuit potential of 1.02 V and a maximum power density of over 1.1 W/cm(2) was achieved with H-2 as fuel and air as oxidant at 800degreesC. The results show that the reactions between LSGM and anode materials were restrained by the LDC electrolyte layer, whereas the electronic conductivity of ceria-based electrolyte was blocked by the LSGM electrolyte layer. (C)2004 The Electrochemical Society.

IT-SOFC operated with catalytically processed methane fuels

Abstract An anode supported solid oxide fuel cell integrated with a catalytic reactor, which processed methane fuels by partial oxidation with air or oxygen, steam reforming and CO2 reforming, were investigated. A supported nickel catalyst was used for methane processing, and the obtained fuels were analyzed by an online gas chromatograph. The fuels processed from partial oxidation with air and CO2 reforming caused an apparent decrease of the cell performance, which was due to the diluting effect of nitrogen and CO2 and the occurrence of limiting current densities. Whereas, the fuels processed from partial oxidation with oxygen and steam reforming affected very little on the cell performance.