Fig. 6: RAMAR symmetric flow cell performance of 1.

a CO₂ readings at the outlet of the WE tank (blue) and CE tank (red), respectively, over 21 repeating cycles for 126-h operation. The CO₂ sensor at the CE tank lost connection to the computer at ~40 h, resulting in a data loss of ~2 h during the 7th cycle of CO₂ capture. b, c CO₂ readings for selected capture-release cycles with the corresponding cumulative amount of CO₂ captured/released in WE (b) and CE (c). The yellow regions highlight the capture and release steps. For each separation cycle, both sorbent tanks were reduced/oxidized at 10 mA (2 mA cm⁻²) for 90 min followed by a 90 min rest. d, e Performance metrics of WE (d) and CE (e). WE and CE were composed of 10 ml DMSO solution containing 125 mM 1, 125 mM 1-ox, 250 mM HTFSI, 500 mM MEA, and 500 mM LiTFSI. Both tanks were stirred and continuously purged with 10% CO₂ (balanced with N₂) at a flow rate of 2 sccm. Source data for Fig. 6 are provided as a Source Data file.