As the Ni composition, particle size and its homogeneous distribution in the SOFC anode of Ni-yttria stabilized zirconia (YSZ) composite are important factors in electrochemical performance, better control of the properties of NiO-YSZ nanocomposite particles as starting powder materials is essential for higher SOFC performance. In this study, their novel co-precipitation method was developed. It aimed the interaction of anionic Zr carbonate complex with cationic Ni and Y ions to achieve its uniform sedimentation. As a result, NiO-YSZ nanocomposite particles with their uniform size were successfully obtained at a facile condition with almost 100% yield. The Ni/YSZ anode was fabricated by screen-printing the paste made by the NiO-YSZ nanocomposite particles and its sintering at 1350 degrees C and subsequent reduction. The anode had a uniform porous structure consisting of fine grains in the range of 200-400 nm, and exhibited low polarization resistance of 0.62, 0.34 and 0.23 Omega cm(2) at 700 degrees C, 750 degrees C and 800 degrees C, respectively. (C) 2013 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.