The emergence of electrically conductive metal-organic frameworks (EC-MOFs) has significantly expanded the scope of MOFs’ applications to electronic devices, electrocatalysis and energy storage. However, their potential is not fully exploited and one reason is due to limited accessibility in internal pores in stacked 2D structure. Herein, we systematically transform a 2D EC-MOF into a 3D framework via postsynthetic pillar insertion. Pillar insertion expanded the stacking distance, resulting in an increase of ion accessibility and an improved gravimetric capacitance up to double that of the pristine counterpart. Beyond this, we believe that our findings can further be used to functionalize the existing 2D EC-MOFs. By utilizing other functional pillar ligands, it will offer additional functionalities in system and give more opportunities in sensing, electronic, and energy-related applications.

Structural augmentation in 2D electrically conductive MOF to 3D by pillar insertion

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