The Action of Nano-Particles in SOFC Electrodes

摘要

Several laboratories have reported very interesting cell performances obtained by incorporation of nano-particles into the composite electrode structures during recent years. A popular method is impregnation. One surprising result is that small amounts in the range of 1 - 3 % of nano-sized material may have a very pronounced effect on the electrode performance. Even more surprising is it that few percentages of undoped CeO2, which is known to have both very low ionic and electronic conductivity in air as well as quite low oxygen surface exchange rate, may decrease the polarisation resistances of a LSM-YSZ composite electrode by a factor of two to three.