Fig. 4: 1H MRI of electrolyte signal before and after galvanostatic plating of the working electrode.

a 3D surface rendering from 1H MRI of electrolyte in the separators before plating. The labelled red planes indicate selected 2D imaging slices from inside the cell. The vertical slice (yz) is at the centre of the separator stack and the horizontal slice (xy) is immediately above the carbon WE. Image slices are shown in columns b before and c after plating. Negative space images from 3D 1H MRI of electrolyte d before and e after galvanostatic plating.