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Hydrangea-Like CuS with Irreversible Amorphization Transition for High-Performance Sodium-Ion Storage

Yang, Z.-G.; Wu, Z.-G.; Hua, W.-B.; Xiao, Y.; Wang, G.-K.; Liu, Y.-X.; Wu, C.-J.; Li, Y.-C.; Zhong, B.-H.; Xiang, W.; Zhong, Y.-J.; Guo, X.-D.

Metal sulfides have been intensively investigated for efficient sodium‐ion storage due to their high capacity. However, the mechanisms behind the reaction pathways and phase transformation are still unclear. Moreover, the effects of designed nanostructure on the electrochemical behaviors are rarely reported. Herein, a hydrangea‐like CuS microsphere is prepared via a facile synthetic method and displays significantly enhanced rate and cycle performance. Unlike the traditional intercalation and conversion reactions, an irreversible amorphization process is evidenced and elucidated with the help of in situ high‐resolution synchrotron radiation diffraction analyses, and transmission electron microscopy. The oriented (006) crystal plane growth of the primary CuS nanosheets provide more channels and adsorption sites for Na ions intercalation and the resultant low overpotential is beneficial for the amorphous Cu‐S cluster, which is consistent with the density functional theory calculation. This study can offer new insights into the correlation between the atomic‐scale phase transformation and macro‐scale nanostructure design and open a new principle for the electrode materials' design.

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Verlagsausgabe §
DOI: 10.5445/IR/1000118983
Veröffentlicht am 16.07.2020
DOI: 10.1002/advs.201903279
Zitationen: 7
Web of Science
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Energiespeichersysteme (IAM-ESS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2198-3844
KITopen-ID: 1000118983
HGF-Programm 37.01.12 (POF III, LK 01) Intercalation
Erschienen in Advanced science
Verlag Wiley Open Access
Band 7
Heft 11
Seiten Article: 1903279
Vorab online veröffentlicht am 08.04.2020
Nachgewiesen in Scopus
Web of Science
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