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Li Song
University of Science and Technology of China
Corresponding Author
ORCiD: https://orcid.org/0000-0003-0585-8519
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Defect engineering has been attracted widespread attention for promoting the stability of the electrodes. However, accurately quantifying and defining the effect of defects is extremely difficult. Here, the Rietveld analysis with combined neutron powder diffraction (NPD) and X-ray powder diffraction (XRD) patterns reveal vanadium defect (Vd) clusters in the V2O3 lattice up to 5.7% in aqueous zinc-ion batteries (ZIBs), further confirmed by positron annihilation spectroscopy (PAS) and synchrotron-based X-ray analysis. Benefitting from the Vd clusters, the V2O3 cathode achieves excellent cycle life with 81% capacity retention at 5.0 A g-1 after 30,000 cycles that is the most superb stable cathode for aqueous ZIBs at this current density. Besides, the density functional theory (DFT) calculations strongly indicate that the Vd clusters not only provide permanent sites for Zn2+ anchormen to enhance the integrity of V2O3 after the first discharging process, but also make Zn2+ de/intercalation in complex oxide, contributing collectively and effectively reducing the strong electrostatic interaction between host multivalent ions, resulting in the remarkable storage performance of Zn2+. This work highlights accurately quantifying and identifying the significant effect of defects for designing cathodes with ultra-long cycle life in future intelligent devices.
Keywords
Defect Engineering, Rietveld Analysis, Neutron Powder Diffraction, X-ray Powder Diffraction, Positron Annihilation Spectroscopy, Electrostatic Interaction, Storage Performance
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See the published version of this preprint at Nature Communications.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Article
Li Song
University of Science and Technology of China
Corresponding Author
ORCiD: https://orcid.org/0000-0003-0585-8519
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at Nature Communications.
Version 1
Posted 03 May, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Energy Engineering
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Nature Communications.
Defect engineering has been attracted widespread attention for promoting the stability of the electrodes. However, accurately quantifying and defining the effect of defects is extremely difficult. Here, the Rietveld analysis with combined neutron powder diffraction (NPD) and X-ray powder diffraction (XRD) patterns reveal vanadium defect (Vd) clusters in the V2O3 lattice up to 5.7% in aqueous zinc-ion batteries (ZIBs), further confirmed by positron annihilation spectroscopy (PAS) and synchrotron-based X-ray analysis. Benefitting from the Vd clusters, the V2O3 cathode achieves excellent cycle life with 81% capacity retention at 5.0 A g-1 after 30,000 cycles that is the most superb stable cathode for aqueous ZIBs at this current density. Besides, the density functional theory (DFT) calculations strongly indicate that the Vd clusters not only provide permanent sites for Zn2+ anchormen to enhance the integrity of V2O3 after the first discharging process, but also make Zn2+ de/intercalation in complex oxide, contributing collectively and effectively reducing the strong electrostatic interaction between host multivalent ions, resulting in the remarkable storage performance of Zn2+. This work highlights accurately quantifying and identifying the significant effect of defects for designing cathodes with ultra-long cycle life in future intelligent devices.
Figure 1
Figure 2
Figure 3
Figure 4
The full text of this article is available to read as a PDF.
There is NO Competing Interest.
This is a list of supplementary files associated with this preprint. Click to download.
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