Functional Nano Structure Materials Lab. Publication

International Journal

Electrochemical Analysis of High-Performance Flow-Electrode Capacitive Mixing (F-CapMix) under Different Operating Conditions
Journal
ACS sustainable chemistry & engineering
Author
Hanki Kim, Jiyeon Choi, Namjo Jeong, Hye-Ji Im, Jeong-gu Yeo, Sung-il Jeon, Won-Gee Chun, Dong Kook Kim, and SeungCheol Yang
Year
2021
Date
2021.07.08
File
Electrochemical Analysis of High-Performance Flow-Electrode Capacitive Mixing F-CapMix under Different Operating Conditions.pdf (4.8M) 7회 다운로드 DATE : 2021-08-18 17:43:42
Unlike fixed-electrode-based capacitive mixing (CapMix) cells that are characterized by intermittent power generation, flow-electrode capacitive mixing (F-CapMix) cells show continuous power generation characteristics owing to the continuous flow of the electrode in the unit cell. F-CapMix cells can be operated in two modes, depending on whether the feed water is fresh water or seawater. In this study, the F-CapMix cell was operated under the fresh-water-based flow-electrode/salt water mode (FFW) and the salt-water-based flow-electrode/fresh water mode (FSW). Under the FFW mode (∼0.175 W/m2), the F-CapMix cell showed a higher power density of 6.7% than under the FSW mode (∼0.164 W/m2). Additionally, impedance analysis based on various flow-electrode and feed water flow conditions under both the modes showed that the higher power density of the F-CapMix cell could be attributed to its lower non-ohmic resistance (i.e., lower charge transfer resistance via the ion-exchange membrane) in the FFW mode than in the FSW mode.