Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/141451
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dc.contributor.authorPark, Hyunjungen_US
dc.contributor.authorKwon, Jiseoken_US
dc.contributor.authorChoi, Heechaeen_US
dc.contributor.authorShin, Donghyeoken_US
dc.contributor.authorSong, Taeseupen_US
dc.contributor.authorLou, David Xiong Wenen_US
dc.date.accessioned2020-06-08T08:43:15Z-
dc.date.available2020-06-08T08:43:15Z-
dc.date.issued2018-
dc.identifier.citationPark, H., Kwon, J., Choi, H., Shin, D., Song, T., & Lou, D. X. W. (2018). Unusual Na+ ion intercalation/deintercalation in metal-rich Cu1.8S for Na-ion batteries. ACS Nano, 12(3), 2827-2837. doi:10.1021/acsnano.8b00118en_US
dc.identifier.issn1936-0851en_US
dc.identifier.urihttps://hdl.handle.net/10356/141451-
dc.description.abstractA key issue with Na-ion batteries is the development of active materials with stable electrochemical reversibility through the understanding of their sodium storage mechanisms. We report a sodium storage mechanism and properties of a new anode material, digenite Cu1.8S, based on its crystallographic study. It is revealed that copper sulfides (CuxS) can have metal-rich formulas (x ≥ 1.6), due to the unique oxidation state of +1 found in group 11 elements. These phases enable the unit cell to consist of all strong Cu–S bonds and no direct S–S bonds, which are vulnerable to external stress/strain that could result in bond cleavage as well as decomposition. Because of its structural rigidness, the Cu1.8S shows an intercalation/deintercalation reaction mechanism even in a low potential window of 0.1–2.2 V versus Na/Na+ without irreversible phase transformation, which most of the metal sulfides experience through a conversion reaction mechanism. It uptakes, on average, 1.4 Na+ ions per unit cell (∼250 mAh g–1) and exhibits ∼100% retention over 1000 cycles at 2C in a tuned voltage range of 0.5–2.2 V through an overall solid solution reaction with negligible phase separation.en_US
dc.language.isoenen_US
dc.relation.ispartofACS Nanoen_US
dc.rights© 2018 American Chemical Society. All rights reserved.en_US
dc.subjectEngineering::Chemical engineeringen_US
dc.titleUnusual Na+ ion intercalation/deintercalation in metal-rich Cu1.8S for Na-ion batteriesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.identifier.doi10.1021/acsnano.8b00118-
dc.identifier.pmid29505231-
dc.identifier.scopus2-s2.0-85044502946-
dc.identifier.issue3en_US
dc.identifier.volume12en_US
dc.identifier.spage2827en_US
dc.identifier.epage2837en_US
dc.subject.keywordsMetal Sulfideen_US
dc.subject.keywordsDigenite Cu1.8Sen_US
item.grantfulltextnone-
item.fulltextNo Fulltext-
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