title: Flow-Electrode Capacitive Deionization Using an Aqueous Electrolyte with a High Salt Concentration.
abstract: Flow-electrode capacitive deionization (FCDI) is novel capacitive deionization (CDI) technology that exhibits continuous deionization and a high desalting efficiency. A flow-electrode with high capacitance and low resistance is required for achieving an efficient FCDI system with low energy consumption. For developing high-performance flow-electrode, studies should be conducted considering porous materials, conductive additives, and electrolytes constituting the flow-electrode. Here, we evaluated the desalting performances of flow-electrodes with spherical activated carbon and aqueous electrolytes containing various concentrations of NaCl in the FCDI unit cell for confirming the effect of salt concentration on the electrolyte of a flow-electrode on desalting efficiency. We verified the necessity of a moderate amount of salt in the flow-electrode for compensating for the reduction in the performance of the flow-electrode, attributed to the resistance of water used as the electrolyte. Simultaneously, we confirmed the potential use of salt water with a high salt concentration, such as seawater, as an aqueous electrolyte for the flow-electrode.
authors.affiliation: Marine Energy Convergence and Integration Laboratory, Jeju Global Research Center, Korea Institute of Energy Research , 200, Haemajihaean-ro, Gujwa-eup, Jeju-si, Jeju-do 63357, Republic of Korea.
authors.forename: SeungCheol
authors.initials: S
authors.lastname: Yang
authors.affiliation: Marine Energy Convergence and Integration Laboratory, Jeju Global Research Center, Korea Institute of Energy Research , 200, Haemajihaean-ro, Gujwa-eup, Jeju-si, Jeju-do 63357, Republic of Korea.
authors.forename: Jiyeon
authors.initials: J
authors.lastname: Choi
authors.affiliation: Advanced Materials and Devices Laboratory, Energy Materials and Process Research Division, Korea Institute of Energy Research , 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea.
authors.forename: Jeong-Gu
authors.initials: JG
authors.lastname: Yeo
authors.affiliation: Advanced Materials and Devices Laboratory, Energy Materials and Process Research Division, Korea Institute of Energy Research , 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea.
authors.forename: Sung-Il
authors.initials: SI
authors.lastname: Jeon
authors.affiliation: Marine Energy Convergence and Integration Laboratory, Jeju Global Research Center, Korea Institute of Energy Research , 200, Haemajihaean-ro, Gujwa-eup, Jeju-si, Jeju-do 63357, Republic of Korea.
authors.forename: Hong-Ran
authors.initials: HR
authors.lastname: Park
authors.affiliation: Energy Materials and Process Research Division, Korea Institute of Energy Research , 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea.
authors.forename: Dong Kook
authors.initials: DK
authors.lastname: Kim
mesh_terms: D025802:Electric Capacitance; D004566:Electrodes; D054712:Salinity; D012965:Sodium Chloride; D018508:Water Purification
chemical_list: D012965:Sodium Chloride