To improve the conductivity of metal-organic frameworks (MOFs) in aqueous solutions, consider forming composites with conductive materials, functionalizing the MOFs with electron-rich groups, and optimizing synthesis conditions. Additionally, adjusting the pH and ionic strength of the solution can further enhance their conductivity.

i think it's different for every MOF, like temperature, synthesis time, pH and many other things but if you use MXene, Graphene, Carbon nanotubes etc these types of conductive materials, you can find good results.