Various additives for Ni anodes mixed with scandium stabilized zirconia (ScSZ) prepared by spray mist dryer are examined for SOFCs in order to improve their anodic activity and long-term durability. Among the additives examined, it is found that the addition of Mn was highly effective to improve anode activity and sulfur tolerance. In case 5 mol% Mn was added to Ni, at 800°C and 200 mA/cm2 for 50% pre-reformed CH4 fuels (S/C = 2.5), the anodic overvoltage was as low as 18 mV and the initial cell voltage drop by 5 ppm H2S was ca. 30 m V, which was less than half of the initial cell voltage drop for undoped Ni-cermet anodes. Mn-oxide reacts with NiO during preparation, while Ni metal nanoparticles will be segregated after reduction and Mn-oxide acts as pinning sites to depress grain growth and agglomeration of Ni particles, leading to lower anodic overvoltage and higher sulfur tolerance. Long-term durability up to 3000 hours has been verified.