Ex situ XANES measurements have also provided insight into the possible degradation pathways of some MOF-based EDLCs by study of the metal oxidation states. The application of XANES to MOF-based energy storage devices shows that techniques which have not typically been used to explore carbon-based EDLCs can be powerful in this new context. The resulting range of unexploited experimental techniques available to understand charge storage and transfer processes in MOF supercapacitors presents exciting opportunities for future research.