High-performance low-temperature solid oxide fuel cells prepared by sol impregnation

Developing low-temperature solid oxide fuel cells (LT-SOFCs) is crucial for practical application of SOFCs. In this wok, we develop a facile infiltration method by using high concentration sol for impregnation operation to prepare nanostructured electrodes for LT-SOFCs. A variety of electrode materials are synthesized efficiently through this method. The nanoparticles are evenly distributed at the surface of the porous electrolyte. This microstructure remarkably improves the electrochemical performance. The single cell with a nano-porous LaxSr1-xCoO3-delta cathode and a Ni anode coating onto the La0.8Sr0.2Ga0.83Mg0.17O2.815 electrolyte shows a power density approaching 1000 mW cm(-2) at 600 degrees C. The process complexity of the impregnated electrode can be greatly reduced via this sol impregnation method, and the uniform and efficient electrode materials can be prepared facilely and quickly. High concentration sol infiltration is a promising method for preparing LT-SOFCs electrodes. (C) 2019 Elsevier B.V. All rights reserved.