科研之友
微信
新浪微博
Facebook
分享链接
摘要
Solid oxide cells (SOCs) have attracted widespread attention due to their high efficiency for direct conversion of a wide variety of fuels to electricity, renewable electricity to green hydrogen or value-added commodities, and tri-generation of power, heat, and hydrogen as needed. The per-formance of SOCs depends sensitively on the kinetics of the complex electrochemical reactions that occur on both the fuel and the air electrodes. To enhance the performance while maintaining long-term durability of SOCs, significant efforts have been dedicated to the development of high-performance electrodes over the past decades. Among them, in situ/operando constructing hetero-structured electrodes or surfaces with unique compositions and structures from the bulk phase is proven an effective strategy. In this article, we start with an overview of the latest developments in enhancing the electrocatalytic activity of electrodes through in situ/operando regulation of the reaction processes on hetero-structured electrodes for SOCs. Then, we highlight the unique microscopic features of the heterostructures and their impact on lattice/defect structure and ionic/electronic transport that are critical to enhancing the electrocatalytic activity and dura-bility. Subsequently, we outline the remaining challenges for knowledge-based design of highly efficient electrodes, together with possible directions and future perspectives for the development of highly efficient electrodes through optimization of the heterointerfaces. It is hoped that this timely and balanced review of heterointerfaces and their effect on the ionic/electronic transport, electrocatalytic activity, and durability of electrode materials may provide some useful insights into the performance enhancement mechanisms and establish a scientific basis for rational design of highly efficient electrodes for SOCs or other electrochemical devices.
-
单位y
