Analysis of structure perovskite cathode materials for solid oxide fuel cells, SOFCs

作者：Alvarado Flores J^*; Espino Valencia J; Avalos Rodriguez L

来源：Revista Mexicana de Fisica, 2015, 61(1): 32-57.

• Perovskite cathode structure
• electrical conductivity
• solid oxide fuel cell (SOFC)

Fuel cells directly and efficiently convert the chemical energy of a fuel into electrical energy. Of the various types of fuel cells, the solid oxide (SOFC), combine the advantages in environmentally benign energy generation with fuel flexibility. However, the need for high operating temperatures (800 - 1000 degrees C) has resulted in high costs and major challenges in relation to the compatibility the cathode materials. As a result, there have been significant efforts in the development of intermediate temperature SOFC (500 - 700 degrees C). A key obstacle for operation in this temperature range is the limited activity of traditional cathode materials for electrochemical reduction of oxygen. In this article, the progress of recent years is discussed in cathodes for SOFC perovskite structure (ABO(3)), more efficient than the traditionally used La1-xSrxMnO3-delta (LSM) or (La, Sr) CoO3. Such is the case of mixed conductors (MIEC) double perovskite structure (AA'B2O5+delta) using different doping elements as La, Sr, Fe, Ti, Cr, Sm, Co, Cu, Pr, Nd, Gd, dy, Mn, among others, which could improve the operational performance of existing cathode materials, promoting the development of optimized intermediate temperature SOFC designs.

• 出版日期2015-2