Preparation of Ni-GDC Powders by the Solution Reduction Method Using Hydrazine and Its Electrical Properties

Ni-GDC (gadolinia-doped ceria) composite powders, the anode material for the application of solid oxide fuel cells, were prepared by a solution reduction method using hydrazine. The distribution of Ni particles in the composite powders was homogeneous. The Ni-GDC powders were sintered at 1400˚C for 2 h and then reduced at 800˚C for 24 h in 3% H2. The percolation limit of Ni of the sintered composite was 20 vol%, which was significantly lower than these values in the literature (30-35 vol%). The marked decrease of percolation limit is attributed to the small size of the Ni particles and the high degree of dispersion. The hydrazine method suggests a facile chemical route to prepare well-dispersed Ni-GDC composite powders.

[1]  John B Goodenough,et al.  Double Perovskites as Anode Materials for Solid-Oxide Fuel Cells , 2006, Science.

[2]  J. M. Kim,et al.  A Chemical Route to Large-Scale Preparation of Spherical and Monodisperse Ni Powders , 2005 .

[3]  S. Jiang,et al.  A review of anode materials development in solid oxide fuel cells , 2004 .

[4]  R. Basu,et al.  Preparation of nickel coated YSZ powder for application as an anode for solid oxide fuel cells , 2004 .

[5]  Seetharama C. Deevi,et al.  A review on the status of anode materials for solid oxide fuel cells , 2003 .

[6]  Nigel P. Brandon,et al.  Recent Advances in Materials for Fuel Cells , 2003 .

[7]  A. Muramatsu,et al.  Synthesis of uniform anatase TiO2 nanoparticles by gel-sol method. 3. Formation process and size control. , 2003, Journal of colloid and interface science.

[8]  Ki Hyun Yoon,et al.  Quantitative analysis of microstructure and its related electrical property of SOFC anode, Ni-YSZ cermet , 2002 .

[9]  B. Steele,et al.  Materials for fuel-cell technologies , 2001, Nature.

[10]  Raymond J. Gorte,et al.  Anodes for Direct Oxidation of Dry Hydrocarbons in a Solid‐Oxide Fuel Cell , 2000 .

[11]  Toshio Maruyama,et al.  Properties of Ni/YSZ cermet as anode for SOFC , 2000 .

[12]  F. Tietz,et al.  Evaluation of commercial nickel oxide powders for components in solid oxide fuel cells , 2000 .

[13]  M. Marinšek,et al.  Preparation of Ni–YSZ composite materials for solid oxide fuel cell anodes by the gel-precipitation method , 2000 .

[14]  Andrew Murray,et al.  Cell cycle: A snip separates sisters , 1999, Nature.

[15]  A. Muramatsu,et al.  Synthesis of Uniform Spherical Cu2O Particles from Condensed CuO Suspensions , 1997 .

[16]  Koichi Eguchi,et al.  Effects of Anode Material and Fuel on Anodic Reaction of Solid Oxide Fuel Cells , 1992 .