RECENT ADVANCES IN PLANAR SOFC DEVELOPMENT AT TOKYO GAS

摘要

The progress and current status of research and development of planar SOFCs at Tokyo Gas are described. By coating the electrolyte with samaria-doped ceria (SDC) on the cathode side and doping YSZ in the Ni/YSZ anode with ceria, a high power density of 0.93 W/cm~2 was obtained in single-cells with self-supporting electrolytes. These modified electrode processing techniques have improved the long-term performance stability as well. A 3-cell stack with an internal-manifold design achieved a high power density of 0.41 W/cm~2, and was successfully operated at fuel utilization up to 80% with CH_4-H_2O fuels. A kW-class stack is to be assembled and tested to demonstrate the potential advantages of our stack design including high power density and direct internal reforming of methane. Some research works for reducing the operating temperature are also described.