To tackle the climate crisis, a switch to low-carbon technologies, including renewable energy sources and electric vehicles, is urgently required. The development of improved energy storage devices is crucial to facilitate this change. In recent years, metal-organic frameworks (MOFs), characterised by their combined high intrinsic porosities and electrical conductivities, have emerged as one of the most promising electrode materials for next-generation energy storage devices. Several such MOFs have displayed encouraging performances in supercapacitors with a wide range of electrolytes, exhibiting specific and areal capacitances on par or exceeding state-of-the-art commercial carbon materials. This has raised the prospect of using MOFs in commercial devices, and their well-defined structures make them promising model electrode materials for structure-performance studies.