-1 ) and energy consumption (in kJ mol -1 ) for literature data for comparison. Data is for a supercapacitor with BPL 4 × 6 activated carbon electrodes and 1 M NaCl electrolyte. Measurements were carried out with a 15% CO 2 and 85% N 2 gas mixture, under flow through conditions. The charging protocol was the same as our negative charging protocol.