A MXene-derived tetrathiafulvalene metal–organic framework for ultra-long supercapattery

Abstract

Metal–organic frameworks (MOFs) have attracted considerable attention for energy-related applications due to their exceptional tailorability, high surface area, and outstanding porosity. However, their widespread deployment in energy storage has been significantly hindered by inherent issues such as low electronic conductivity, chemical instability, and challenging morphological control. In a groundbreaking study, our joint groups first demonstrated the use of V₂CT_x MXenes as a metallic precursor for creating two-dimensional (2D) MOF nanosheets, opening avenues for diverse device applications. Building upon this advancement, we report the synthesis of a conductive tetrathiafulvalene-based 2D MOF that is successfully deployed for supercapattery applications. Our findings reveal that the V₂CT_x-TMOF (T = 4,4′,4′′,4′′′-([2,2′-bi(1,3-dithiolylidene)]-4,4′,5,5′-tetrayl)tetrabenzoic acid), synthesized directly from V₂CT_x MXenes with a distinct 2D nanosheet morphology, exhibits one of the finest electrochemical performances with very remarkable long-term cycling stability and high specific capacity. This work presents a novel approach to developing advanced MOF-based electrode materials by leveraging the unique attributes of MXenes precursors.