Exploring the scope of capacitance-assisted electrochemical carbon dioxide captureElectronic supplementary information (ESI) available: Details of experimental procedures, calibration curves and quantitative data for anode separation experiments. See DOI: 10.1039/c8dt01783b

Optimisation of a capacitance-assisted electrochemical carbon-capture process is facilitated by the physical separation of the graphite and aluminium anode electrodes. This facilitates graphite electrode recycling and enables high current and increased aluminium surface area experiments which fix carbon at a higher rate and the same cell-voltage. Quantification of the H 2 cathode byproduct shows that this process could be a net energy producer if recycled aluminium is used as the sacrificial anode. Electrochemical carbon mineralisation is facilitated by the separation of the graphite and aluminium anode components.