We conducted two sets of experiments; the first is a proof-of concept experiment to demonstrate the functionality of our print-and-plate electrodes, and the second is a three-dimensional imaging experiment to capture local concentration of H2AQDS in a specific region of the electrode. For our proof-of-concept experiment, we used humidified hydrogen gas at ambient pressure with a Pt-coated gas diffusion electrode on the non-fluorescent half-cell. For our three-dimensional imaging experiment, the non-fluorescent halfcell electrolyte was 20 mM VOSO4 and 20 mM V2O5 in 1M H2SO4 flowing through a 2 cm x 1 cm commercially available Avcarb MGL280 carbon paper electrode to provide a stable reference of 50% SOC for measurement. During assembly, we wetted the print-and-plate electrode and corresponding PDMS channel with 1 M H2SO4 to prevent air bubbles forming inside the cell. The half-cells, separated by an ionexchange membrane (Nafion 212 soaked in 1M H2SO4), were compressed between the 3D printed base and an acrylic endplate with bolts.