Recent advances in oriented metal–organic frameworks for supercapacitive energy storage

Abstract

Much effort has been devoted to preparing metal–organic frameworks (MOFs) as effective electrode materials for supercapacitors (SCs) due to their rich porosity, abundant redox sites, and high surface area. However, aggregated structures and poor conductivity are two major barriers associated with further applying MOF-based materials in energy storage applications. To deal with low conductivity and poor electrochemical active sites, the majority of the MOFs are transformed into functional materials which need energy-intensive methods such as annealing at a high temperature which often leads to degraded porosity and a low surface area. Thus, to address these problems, designing an efficient and structured approach is critical in preparing MOFs as advanced electrode materials. In this regard, oriented MOFs have emerged as the possible solution to unlock the bottleneck performance in SCs. In this article, we highlight the recent progress in oriented MOF electrode materials and suggest key points to be considered during the utilization of oriented MOFs.