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Dielectric-ion-conductive ZnNb$_2$O$_6$ layer enabling rapid desolvation and diffusion for dendrite-free Zn metal batteries

Yang, Haifeng; Wang, Jian 1; Zhang, Panpan; Cheng, Xiaomin; Guan, Qinghua; Dong, Jing; Chen, Bixian; Jia, Lujie; Zhang, Jing ; Zhang, Yongzheng ; Liu, Yunjian; Lin, Hongzhen
1 Karlsruher Institut für Technologie (KIT)

Abstract:

Rechargeable aqueous zinc-metal batteries (AZMBs) are promising candidates for large-scale energy storage systems due to their low cost and high safety. However, their performance and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water molecules tightly participate in the Zn (H$_2$O)$^{2+}$$_6$ solvation shell. Herein, learnt from self-generated solid electrolyte interphase (SEI) in anodes, the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on metallic Zn surface (ZNB@Zn), acting as a rapid desolvation promotor. The zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite formation, achieving uniform Zn plating/stripping behavior, as confirmed by electronic/optical microscopies and interface spectroscopical measurements together with theoretical calculations. Consequently, the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility (99.54%) even under high current density and depth of discharge conditions. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000175050
Veröffentlicht am 04.11.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Karlsruher Institut für Technologie (KIT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2025
Sprache Englisch
Identifikator ISSN: 2095-4956, 2096-885X
KITopen-ID: 1000175050
Erschienen in Journal of Energy Chemistry
Verlag Elsevier
Band 100
Seiten 693 – 701
Vorab online veröffentlicht am 16.09.2024
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Web of Science
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