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Self-Assembled Surfactant-Polyoxovanadate Soft Materials as Tuneable Vanadium Oxide Cathode Precursors for Lithium-Ion Batteries
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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.
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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.. Self-Assembled Surfactant-Polyoxovanadate Soft Materials as Tuneable Vanadium Oxide Cathode Precursors for Lithium-Ion Batteries. _Angewandte Chemie-International Edition_. 2023. Vol. e202216066. [consulta: 21 de gener de 2026]. ISSN: 1433-7851. [Disponible a: https://hdl.handle.net/2445/194004]