Improvements in the anode and the fuel side current collector have been carried out in order to increase the output power of the intermediate- temperature (IT) solid oxide fuel cells (SOFCs) using lanthanum gallate electrolyte. Dispersion of nano-size metal in the cermet anode composed of Sm doped ceria (SDC) and Ni has been tried. As a source material to manufacture the novel anode, SDC powder incorporated with nano-size Ru particles was developed. In order to achieve in-situ production of hydrogen inside the cell-stack, fuel side current collectors were impregnated with catalyst metals such as Ru or Ni. It was demonstrated experimentally that the developed current collectors have high catalytic activity for steam reforming reaction of methane and also have favorable effect in increasing the power density. Replacement of the dopant in ceria from Sm to Gd is also tested both for the anode and the fuel side current collector.