Journal article
Hybrid bilayered vanadium oxide electrodes with large and tunable interlayer distances in lithium-ion batteries
Journal of colloid and interface science, v 674, pp 612-623
15 Nov 2024
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Abstract
[Display omitted]
The interlayer distances in layered electrode materials, influenced by the chemical composition of the confined interlayer regions, have a significant impact on their electrochemical performance. Chemical preintercalation of inorganic metal ions affects the interlayer spacing, yet expansion is limited by the hydrated ion radii. Herein, we demonstrate that using varying concentrations of decyltrimethylammonium (DTA+) and cetyltrimethylammonium (CTA+) cations in chemical preintercalation synthesis followed by hydrothermal treatment, the interlayer distance of hybrid bilayered vanadium oxides (BVOs) can be tuned between 11.1 Å and 35.6 Å. Our analyses reveal that these variations in interlayer spacing are due to different amounts of structural water and alkylammonium cations confined within the interlayer regions. Increased concentrations of alkylammonium cations not only expand the interlayer spacing but also induce local bending and disordering of the V-O bilayers. Electrochemical cycling of hybrid BVO electrodes in non-aqueous lithium-ion cells show that specific capacities decrease as interlayer regions expand, suggesting that the densely packed alkylammonium cations obstruct intercalation sites and hinder Li+ ion transport. Furthermore, we found that greater layer separation facilitates the dissolution of active material into the electrolyte, resulting in rapid capacity decay during extended cycling. This study emphasizes that layered electrode materials require both spacious interlayer regions as well as high structural and chemical stabilities, providing guidelines for structural engineering of organic–inorganic hybrids.
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Details
- Title
- Hybrid bilayered vanadium oxide electrodes with large and tunable interlayer distances in lithium-ion batteries
- Creators
- Xinle Zhang - Drexel UniversityRyan Andris - Drexel UniversityTimofey Averianov - Drexel UniversityMichael J. Zachman - Oak Ridge National LaboratoryEkaterina Pomerantseva - Drexel University
- Publication Details
- Journal of colloid and interface science, v 674, pp 612-623
- Publisher
- Elsevier; SAN DIEGO
- Number of pages
- 12
- Grant note
- National Science Foundation: DMR-2106445
This work was supported by the National Science Foundation grant DMR-2106445. XRD, SEM and XPS analyses were performed using in-struments in the Materials Characterization Core at Drexel University. The scanning transmission electron microscopy portion of this research was supported by the Center for Nanophase Materials Sciences (CNMS) , which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. We thank Prof. Kevin Owens from the Department of Chemistry at Drexel University for providing us with access to the atomic absorption spectroscopy analysis in the Instru-mental Analytical Laboratory.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001282541700001
- Scopus ID
- 2-s2.0-85197037677
- Other Identifier
- 991021892015604721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Physical