We further investigated if the performance of the module was dependent on the size of the electrodes, by preparing additional electrodes having an increased area of 49 cm 2 . The voltage response and CO2 concentration profiles for all the electrodes exhibit similar adsorption-desorption behavior (Figure ). The overall change in concentration increased during charging and discharging, owing to the longer distance that CO2 has to travel through the electrodes. Charging of 49 cm 2 GS-AC electrodes resulted in a CO2 concentration decrease from 15 % to around 5 % (Figure ) while only 1-2 % decrease in CO2 concentration was observed with 4 cm 2 electrodes. The size of the electrodes was limited only by the size of the Ti current collector end plates. Further scaling of the end plates would allow for even larger electrodes and may produce a pure N2 effluent stream. The energetic and the adsorptive metrics for 49 cm 2 electrodes are shown in Figure and table . The trend of capacitance and gravimetric adsorption capacity is the same as 4 cm 2 electrodes, with GR-AC, GS-AC, and GP-AC exhibiting the maximum gravimetric adsorption capacities of 198 mmol.Kg -1 , 194 mmol.Kg -1 , and 189 mmol.Kg -1 , respectively. S-AC, Y-AC and BPL-AC show significantly lower values of 119, 69.2, and 62.8 mmol.kg -1 (Figure and Table ). The volumetric sorption capacity follows the sequence: GS-AC (36.7 mol.m -3 ) ≈ GP-AC (36.3 mol.m -3 ) > GR-AC (28.2 mol.m -3 ) > S-AC (27.2 mol.m -3 ), > BPL-AC (23.1 mol.m -3 > Y-AC (20.5 mol.m -3 ) (Figure ). This is similar to the trend seen for 4cm 2 electrodes, however GS-AC and GP-AC switch rank 1 and 2, GR-AC and S-AC switch rank 3 and 4, and BPL-AC and Y-AC switch rank 5 and 6. Generally, sorption capacities are lower for the 49 cm 2 electrodes on both a gravimetric and volumetric basis. Nonetheless, there is still a 3.2-fold improvement on a gravimetric basis (198 vs 62.8 mmol.kg -1 ) and a 1.6-fold increase (36.7 mol.m -3 vs. 23.1 mol.m 3 ) on a volumetric basis compared to BPL-AC. The productivity, and the adsorption rates of 49 cm 2 electrodes are also less compared to 4 cm 2 electrodes. The lower sorption capacity, adsorption rate, and productivity may be because the gas flow may not be exactly radial for the 49 cm 2 electrodes. There could be preferential gas flow from the center to the exit hole at the periphery of the bigger electrodes caused by a pressure gradient within the smaller void volume around the electrodes. Increasing this void space by increasing the size of the current collector plate may eliminate the pressure gradient inside the void space. The adsorption rate and productivity follow the same trend as gravimetric adsorption capacity and volumetric adsorption capacity, respectively (Figure ). The coulombic efficiency of 49 cm 2 electrodes is higher than for the 4 cm 2 electrodes (Figure ). Despite the highest resistance, GS-AC electrodes show a coulombic efficiency of 94.9%, indicating that charge-discharge process is highly reversible. The energy efficiency and energy loss follow a similar sequence to 4 cm 2 electrodes with BPL-AC showing the highest energy efficiency (64.1%) and smallest energy loss (12.1 J) while GS-AC exhibits the lowest energy efficiency (14.8%) and highest energy loss (55 J) (Figure and). Generally, higher resistance values and lower capacitance values are seen for the 49 cm 2 electrodes as compared to the 4 cm 2 electrodes. This may be explained by the fact that the same torque (20 in.lb) was used to assemble the SSA modules with different electrodes sizes, possibly resulting in higher contact resistance for the 49 cm 2 electrodes. The results agree with EIS comparison of 4 cm 2 and 49 cm 2 BPL electrodes (Figure ), where 49 cm 2 electrodes show slightly higher resistance and slightly lower specific capacitance as compared to 4 cm 2 electrodes. Adjusting the torque and packing pressure may result in a size-independent energetic performance of the SSA modules. ) < GP-AC (245 kJ.mol -1 ) < S-AC (327 kJ.mol -1 ) < Y-AC (353 kJ.mol -1 ) < GS-AC (439 kJ.mol -1 ) (Figure ). Except GR-AC and BPL-AC, the 49 cm 2 electrodes exhibit higher energy consumption than 4 cm 2 electrodes. This can be attributed to lower energy loss and better reversible behavior of GR-AC and BPL-AC. Since the energy consumption is the ratio of energy loss to the moles of CO2 absorbed, scaling GR-AC and BPL-AC from 4 cm 2 to 49 cm 2 led to about 7 times increase in energy loss and about 9 times increase in the moles of adsorbed CO2. In contrast, scaling of GP-AC and S-AC lead to about 12 times increase in energy loss and about 7.5 times increase in the moles of CO2 absorbed. GS-AC and Y-AC electrodes show about 10 times increase in energy loss and 8.5 times increase in the moles of adsorbed CO2. The smallest increase in energy loss of GR-AC and BPL-AC explains the smallest energy consumption of these two electrodes. The charge efficiency of the electrodes follows the sequence: GR-AC (0.16) > GS-AC (0.14) > GP-AC (0.12) ≃ BPL-AC (0.12) > S-AC (0.10) > Y-AC (0.09) (Figure ). Similar to the energy consumption, the charge efficiency (CE) of 49 cm 2 GR-AC and BPL-AC electrodes stays the same as 4 cm 2 electrodes but significantly decreases for GP-AC, GS-AC, BPL-AC, Y-AC. These results argue that not only the energy loss but also the absolute number of moles of CO2 adsorbed in case of GR-AC and BPL-AC is highest among other electrodes. Overall, 49 cm 2 electrodes results in improved purity of the effluent gas but requires further optimization to avoid scaling effects that influence adsorptive and energetic performance metrics.