One design criterion that has not yet been optimised for layered MOF supercapacitors is the electrolyte ion size to electrode pore size ratio. Previous studies have attempted to answer this question for nanoporous carbon electrodes, although differences and difficulties in analysing the pore structure of carbon materials, which have amorphous and disordered structures, have led to conflicting and confusing results. One effect observed in some studies on this topic is 'porosity saturation' of the porous carbon electrode. This involves the complete filling of the electrolyte accessible surface area of the electrode during charging, and occurs when using electrolytes with larger ion sizes and carbons with low relative porosities. This tends to result in asymmetric charging, with a decreasing capacitance at high cell voltages due to saturation of the pores. These findings indicate that smaller ion sizes are favourable for higher performance when using electrode materials with lower total porosities than traditional porous carbons. While the impact of electrolyte ion size on the performances of porous carbons has been studied in detail, layered MOF electrodes remain underexplored, with no studies looking at the impact of ion size on the performances of triphenylene-based MOFs which have been widely studied in the literature and display primarily double-layer capacitive behaviour. Such a study would provide insights into the ideal ion size for this family of materials, allowing for further optimisation of MOF-based systems. The well-defined structures of MOFs would also help to test general design principles for supercapacitors more widely.