Huaiwen Nie

Material research for planar SOFC stack

In the present paper, material research dealing with electrolyte, anode, cathode, interconnect and sealant for planar solid oxide fuel cell (SOFC) stack has been reported. Depending on the materials research, a two-cell stack and a 10-cell stack with cell size of 40x40 mm 2 were established and tested. The 10-cell stack at 1000 °C showed a power output of about 10 W and a power density of about 110 mW/cm 2 .

Study of Ln0.6Sr0.4Co0.8Mn0.2O3-δ (Ln = La, Gd, Sm or Nd) as the cathode materials for intermediate temperature SOFC

Perovskite type oxides Ln{sub 0.6}Sr{sub 0.4}Co{sub 0.8}Mn{sub 0.2}O{sub 3-{delta}} (Ln=La, Gd, Sm, or Nd) have been prepared by the solid state reaction of corresponding oxides. The crystal parameters of the compositions were determined by XRD powder diffraction, which revealed that all the compositions have orthorhombic structure. The reaction test of all samples with Ce{sub 0.8}Gd{sub 0.2}O{sub 1.9} was carried out at 1200 deg. C for 48 h, and no reaction product was detected by XRD. The change in mass of La{sub 0.6}Sr{sub 0.4}Co{sub 0.8}Mn{sub 0.2}O{sub 3-{delta}} as a function of temperature was determined by thermogravimetric analysis (TGA). The electrical conductivity of the sintered samples were measured as a function of temperature from 200 to 1000 deg. C. The highest conductivity of about 1400 S cm{sup -1} was found in La{sub 0.6}Sr{sub 0.4}Co{sub 0.8}Mn{sub 0.2}O{sub 3-{delta}}. The cathodic polarization of these oxides electrodes deposited on Ce{sub 0.8}Gd{sub 0.2}O{sub 1.9} tablet was studied at 500-800 deg. C in air.

Research on planar SOFC stack

The present paper reports the achievement of solid oxide fuel cell (SOFC) stack research in Shanghai Institute of Ceramics, Chinese Academy of Sciences. Single column SOFC stacks with internal manifolding and cross-flow structure were established and successfully operated. The investigation of materials and components relating the stacks are also briefly described.