2D Metal–Organic Frameworks for Electrochemical Energy Storage

Abstract

Metal–organic frameworks (MOFs) have been widely adopted in various fields (catalysis, sensor, energy storage, etc.) during the last decade owing to the trait of abundant surface chemistry, porous structure, easy‐to‐adjust pore size, and diverse functional groups. However, the limited active sites and the poor conductivity hinder the relative practical application. 2D MOFs can shorten the ion transport path with the merit of layered structure. The large surface area can increase the number of active sites as well as effectively utilize the sufficient active sites, exhibiting enormous potential in the field of energy storage systems (EESs). In this review, the characteristics of the 2D MOFs have been introduced, and the systematic synthesis methods (top‐down and bottom‐up) of 2D MOFs are presented, providing fundamental understanding for the construction of 2D MOFs. Moreover, the applications of 2D MOFs in energy storage fields such as supercapacitors and batteries are demonstrated in detail. Finally, the future development prospects have been proposed, offering guidelines for the rational utilization of 2D MOFs and promoting the understanding of 2D MOFs in EESs.

Engineering Functionalized 2D Metal‐Organic Frameworks Nanosheets with Fast Li+ Conduction for Advanced Solid Li Batteries

“…[19,20,21] The layered structure of 2D MOFs shortens ion transfer paths and enhances ion conductance. [22] Additionally, the larger surface area of 2D MOFs can bring largely enhanced contact area between the PEO and filler materials, thus increasing the amount of active sites and providing many possibilities for targeted functional design. [23] In this study, molecular-scale engineering of 2D MOFs is proposed to further regulate ion transport in the composite electrolyte.…”

Biomimetic Two-Dimensional Composited Membranes for Ion Separation and Desalination

“…Metal–organic frameworks (MOFs) and covalent organic frameworks (COFs) are both examples of synthetic materials characterized by their layered structures. , MOFs, in particular, are crystalline porous materials constructed from metal nodes coordinated with organic linkers. , The unique structural arrangement of MOFs results in a highly porous network, facilitating the diffusion of ions within the membrane and exhibiting low free energy barriers and high permeability during separation processes . While a vast array of MOFs has been synthesized, achieving high-quality two-dimensional (2D) MOFs with single-layer or few-layer thicknesses remains a formidable challenge in the field .…”

Recent Advances and New Challenges: Two-Dimensional Metal–Organic Framework and Their Composites/Derivatives for Electrochemical Energy Conversion and Storage

“…Crystalline porous materials are an attractive candidate to meet the needs of next-generation energy conversion and storage technologies. Metal-organic frameworks (MOFs) are the fascinating crystalline porous hybrid materials composed of infinite lattices of inorganic (metal ions or clusters) and organic ligands via coordination bonds [1][2][3][4][5][6]. This particular research area has gained momentum since the 1960s.…”