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Title: Self-Assembled Surfactant-Polyoxovanadate Soft Materials as Tuneable Vanadium Oxide Cathode Precursors for Lithium-Ion Batteries
Author: McNulty, R.
Penston, Keir
Amin, Sharad S.
Stal, Sandro
Lee, Jie Yie
Samperi, Mario
Pérez García, M. Lluïsa (Maria Lluïsa)
Cameron, Jamie M.
Johnson, Lee R.
Amabilino, David B.
Newton, Graham N.
Keywords: Nanopartícules
Materials nanoestructurats
Nanostructured materials
Issue Date: 2023
Publisher: Wiley-VCH
Abstract: The mixing of [V10O28]6− decavanadate anions with a dicationic gemini surfactant (gem) leads to the spontaneous self-assembly of surfactant-templated nanostructured arrays of decavanadate clusters. Calcination of the material under air yields highly crystalline, sponge-like V2O5 (gem-V2O5). In contrast, calcination of the amorphous tetrabutylammonium decavanadate allows isolation of a more agglomerated V2O5 consisting of very small crystallites (TBA-V2O5). Electrochemical analysis of the materials' performance as lithium-ion intercalation electrodes highlights the role of morphology in cathode performance. The large crystallites and long-range microstructure of the gem-V2O5 cathode deliver higher initial capacity and superior capacity retention than TBA-V2O5. The smaller crystallite size and higher surface area of TBA-V2O5 allow faster lithium insertion and superior rate performance to gem-V2O5.
Note: Versió postprint del document publicat a:
It is part of: Angewandte Chemie-International Edition, 2023, p. e202216066
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ISSN: 1433-7851
Appears in Collections:Articles publicats en revistes (Farmacologia, Toxicologia i Química Terapèutica)

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