A hybrid system of capacitive deionization and redox flow battery for continuous desalination and energy storage

Kim, Byeongkyu; Seo, Jung Yong; Chung, Chan‐Hwa

doi:10.1016/j.jpowsour.2019.227384

Cited by 27 publications

(29 citation statements)

References 25 publications

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“…This means that the removal of the salt ion almost depends on the change in charge balance during the redox reaction of RAMs, and the movement of the salt ion plays the role of the supporting electrolyte in conventional RFB systems . Therefore, the desalination capacity corresponds to the total amounts of RAMs in the system . Compared with the conventional CDI cells, in which the total amount of the electrode material is limited due to its thin layer structure, this hybrid system can easily increase the total capacity of desalination, similar to the case for the RFB .…”

Section: Resultsmentioning

confidence: 99%

“…When the module is charged, oxidation and reduction of RAMs occur in RFB cells, and the counterions move to RFB electrolytes from a brine solution in the CDI cell, because of the potential difference of the two electrodes and migration for maintaining charge balance of RFB electrolytes. This means the brine solution is desalinated upon application of the potentials for charging RFB cells. − To capture the Li ions selectively, the particles of ion sieves are placed in the anolyte tank. In the anolyte tank, Li ions are selectively captured on the ion sieves and the rest of cations remain in the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Desalination and Recovery of Lithium from Saline Water upon Operation of a Capacitive Deionization Cell Combined with a Redox Flow Battery

2021

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With the drastic growth in the demand for lithium, recovery technologies that remove Li ions from a brine solution are attracting more interest. In this field, capacitive deionization (CDI) has been suggested in various studies because it is energy efficient, economical, and environmentally friendly. These selective processes, however, have not been accompanied by desalination, which is a nonselective process by which salt ions are removed from the brine. In this work, a new-concept system has been designed for the simultaneous desalination and recovery of Li from the brine, in which the two different ion-exchange membranes separate the two electrochemically active spaces of desalination and lithium recovery. It is originally based on the combination of a redox flow battery (RFB) and CDI. The CDI cell has been sandwiched between two electrodes of a RFB, which has been operated and desalinates the brine simultaneously with the charging step of the RFB. In addition, an ion sieve (λ-MnO 2 ) has been utilized in the anolyte tank of the RFB cell, which selectively captures the lithium ions during desalination in CDI and charging in RFB. This combined system has been operated successfully with good desalination performances along with high selectivity in lithium-ion capture.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical Desalination and Recovery of Lithium from Saline Water upon Operation of a Capacitive Deionization Cell Combined with a Redox Flow Battery

2021

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“…Schematic representation of hybrid system containing CDI and RFD. Reprinted from Kim, Seo, and Chung (2020), copyright (2020), with permission from Elsevier…”

Section: Architecture Perspectivementioning

confidence: 99%

“…The system showed good stability over 50 cycles. Later, Kim et al (2019) and Kim, Seo, and Chung (2020) applied the same architecture using flow of redox electrolytes in the side chambers. The former developed multichannel RFD with a redox couple of sodium ferricyanide (Na 3 Fe(CN) 6 ) and sodium ferrocyanide (Na 4 Fe(CN) 6 ) flowing in side channels as shown in Figure 16a.…”

Section: Inverted Capacitive Deionization (I-cdi)mentioning

confidence: 99%

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

Datar

Mane

Jha

2022

Water Environment Research

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Capacitive deionization is an emerging and rapidly developing electrochemical technique for water desalination across the globe with exponential growth in publications. There are various architectures and materials being explored to obtain utmost electrosorption performance. The symmetric architectures consist of the same material on both electrodes, while asymmetric architectures have electrodes loaded with different materials. Asymmetric architectures possess higher electrosorption performance as compared with that of symmetric architectures owing to the inclusion of either faradaic materials, redox‐active electrolytes, or ion specific pre‐intercalation material. With the materials perspective, faradaic materials have higher electrosorption performance than carbon‐based materials owing to the occurrence of faradaic reactions for electrosorption. Moreover, the architecture and material may be tailored in order to obtain desired selectivity of the target component and heavy metal present in feed water. In this review, we describe recent developments in architectures and materials for capacitive deionization and summarize the characteristics and salt removal performances. Further, we discuss recently reported architectures and materials for the removal of heavy metals and radioactive materials. The factors that affect the electrosorption performance including the synthesis procedure for electrode materials, incorporation of additives, operational modes, and organic foulants are further illustrated. This review concludes with several perspectives to provide directions for further development in the subject of capacitive deionization. Practitioner Points Capacitive deionization (CDI) is a rapidly developing electrochemical water desalination technique with exponential growth in publications. Faradaic materials have higher salt removal capacity (SAC) because of reversible redox reactions or ion‐intercalation processes. Combination of CDI with other techniques exhibits improved selectivity and removal of heavy metals. Operational parameters and materials properties affect SAC. In future, comprehensive experimentation is needed to have better understanding of the performance of CDI architectures and materials.

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“…The energy amount required for a desalination process depends on the quality of input water, level of water treatment, treatment technology used by the facility, and the treatment plant capacity [7,10,11]. As a substitute or replacement for electrical energy, desalination systems powered by renewable energies represent a real alternative to reduce operating costs in conventional desalination systems [12,13]. Table 1 shows the energy required to produce 1 m 3 of fresh water from distinct types of water sources.…”

Section: Introductionmentioning

confidence: 99%

Commercial Thermal Technologies for Desalination of Water from Renewable Energies: A State of the Art Review

et al. 2021

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Thermal desalination is yet a reliable technology in the treatment of brackish water and seawater; however, its demanding high energy requirements have lagged it compared to other non-thermal technologies such as reverse osmosis. This review provides an outline of the development and trends of the three most commercially used thermal or phase change technologies worldwide: Multi Effect Distillation (MED), Multi Stage Flash (MSF), and Vapor Compression Distillation (VCD). First, state of water stress suffered by regions with little fresh water availability and existing desalination technologies that could become an alternative solution are shown. The most recent studies published for each commercial thermal technology are presented, focusing on optimizing the desalination process, improving efficiencies, and reducing energy demands. Then, an overview of the use of renewable energy and its potential for integration into both commercial and non-commercial desalination systems is shown. Finally, research trends and their orientation towards hybridization of technologies and use of renewable energies as a relevant alternative to the current problems of brackish water desalination are discussed. This reflective and updated review will help researchers to have a detailed state of the art of the subject and to have a starting point for their research, since current advances and trends on thermal desalination are shown.

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A hybrid system of capacitive deionization and redox flow battery for continuous desalination and energy storage

Cited by 27 publications

References 25 publications

Electrochemical Desalination and Recovery of Lithium from Saline Water upon Operation of a Capacitive Deionization Cell Combined with a Redox Flow Battery

Electrochemical Desalination and Recovery of Lithium from Saline Water upon Operation of a Capacitive Deionization Cell Combined with a Redox Flow Battery

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

Commercial Thermal Technologies for Desalination of Water from Renewable Energies: A State of the Art Review

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