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Battery electrode materials with omnivalent cation storage for fast and charge-efficient ion removal of asymmetric capacitive deionization

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dc.contributor.authorChoi, Seungyeon-
dc.contributor.authorChang, Barsa-
dc.contributor.authorKim, Seoni-
dc.contributor.authorLee, Jiho-
dc.contributor.authorYoon, Jeyong-
dc.contributor.authorChoi, Jang Wook-
dc.date.accessioned2020-03-16T11:06:48Z-
dc.date.available2020-03-16T11:06:48Z-
dc.date.issued2018-08-
dc.identifier.citationAdvanced Functional Materials, Vol.28 No.35, p. 1802665-
dc.identifier.issn1616-301X-
dc.identifier.other77102-
dc.identifier.urihttps://hdl.handle.net/10371/164603-
dc.description.abstractCapacitive deionization (CDI) that engages porous carbon electrodes constitutes one of the well-established energy-efficient desalination methods. However, improvement in desalination performance, including ion removal capacity, ion removal rate, and charge efficiency remains requisite for a wide range of applications. Herein, an ion-exchange membrane-free asymmetric CDI is introduced by pairing a metal organic framework (MOF), namely, K0.03Cu[Fe(CN)(6)](0.65)center dot 0.43H(2)O and porous carbon. The exclusive intercalation of cations into the MOF prevents the reverse adsorption of co-ions (anions), thus significantly improving ion removal capacity (23.2 mg g(-1)) and charge efficiency (75.8%). Moreover, by utilizing the advantage of the MOF that diverse mono- and divalent cations can be stored in the narrow redox potential range, the asymmetric CDI allows simultaneous capture of mono- and divalent cations, thus achieving omnivalent cation removal. Moreover, cations are intercalated in the hydrated forms without a discrete phase transition of the host structure, facilitating rapid desalination by reducing the desolvation energy penalty, which results in a high ion removal rate of 0.24 mg g(-1) s(-1). This study offers a new design principle in CDI: the integration of a crystal structure with large ionic channels that enable hydrated intercalation of multivalent ions in a fast and exclusive manner.-
dc.subjectasymmetric capacitive deionization-
dc.subjectdesalination-
dc.subjection-exchange membranes-
dc.subjection removal efficiency-
dc.subjectmetal organic frameworks-
dc.titleBattery electrode materials with omnivalent cation storage for fast and charge-efficient ion removal of asymmetric capacitive deionization-
dc.typeArticle-
dc.contributor.AlternativeAuthor최장욱-
dc.contributor.AlternativeAuthor윤제영-
dc.identifier.doi10.1002/adfm.201802665-
dc.citation.journaltitleAdvanced Functional Materials-
dc.identifier.scopusid2-s2.0-85050468141-
dc.citation.number35-
dc.citation.startpage1802665-
dc.citation.volume28-
dc.identifier.urlhttps://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201802665-
dc.identifier.rimsid77102-
dc.identifier.sci000442731200012-
dc.description.isOpenAccessN-
dc.contributor.affiliatedAuthorChoi, Jang Wook-
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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