Fabrication of a high-performance nano-structured Ln1−xSrxMO3−δ (Ln = La, Sm; M = Mn, Co, Fe) SOC electrode through infiltration

Abstract

As a clean, efficient and promising energy conversion device, solid oxide cell (SOC), which can achieve reciprocal transformation between chemical fuels and electricity, has captured worldwide attention. However, SOC technology still needs to be further developed to satisfy market requirements, especially with respect to the optimization of electrode materials, structures and performances at intermediate temperatures. Recent studies have focused on the fabrication of oxygen electrodes by infiltration or impregnation. As a new approach, infiltrating electrocatalysts into a porous backbone has been proved to achieve excellent electrochemical performance. In this review, the principles, advantages and applications of impregnation are discussed in detail, mainly covering the electrocatalytic activity and long-term stability of infiltrated electrodes. In addition, the research progress and major achievements of infiltrated Ln_1−xSr_xMO_3−δ (Ln = La, Sm; M = Mn, Co, Fe) electrodes during the last 15 years are reviewed. Finally, the challenges and prospects of infiltration technology in practical applications are proposed.