The Missing Piece: The Structure of the Ti3C2Tx MXene and Its Behavior as Negative Electrode in Sodium Ion Batteries
| Autor: | Paolo Ghigna, S. Marchionna, Irene Quinzeni, Chiara Ferrara, Giovanni Maria Vanacore, Riccardo Ruffo, Antonio Gentile, Clemens Ritter, Simone Pollastri, Martina Fracchia |
|---|---|
| Přispěvatelé: | Ferrara, C, Gentile, A, Marchionna, S, Quinzeni, I, Fracchia, M, Ghigna, P, Pollastri, S, Ritter, C, Vanacore, G, Ruffo, R |
| Rok vydání: | 2021 |
| Předmět: |
Diffraction
Materials science XAS Intercalation (chemistry) diffraction Bioengineering Electrochemistry extended defects extended defect Crystal Faults MXene sodium ion batteries structure Ti 3 C 2 T x General Materials Science X-ray absorption spectroscopy Mechanical Engineering General Chemistry Condensed Matter Physics Fault Anode Lamella (surface anatomy) Chemical engineering Electrode sodium ion batterie |
| Zdroj: | Nano Letters 'Nano Letters ', vol: 21, pages: 8290-8297 (2021) |
| ISSN: | 1530-6984 |
| DOI: | 10.1021/acs.nanolett.1c02809 |
| Popis: | The most common MXene composition Ti3C2Tx(T = F, O) shows outstanding stability as anode for sodium ion batteries (100% of capacity retention after 530 cycles with charge efficiency >99.7%). However, the reversibility of the intercalation/deintercalation process is strongly affected by the synthesis parameters determining, in turn, significant differences in the material structure. This study proposes a new approach to identify the crystal features influencing the performances, using a structural model built with a multitechnique approach that allows exploring the short-range order of the lamella. The model is then used to determine the long-range order by inserting defective elements into the structure. With this strategy it is possible to fit the MXene diffraction patterns, obtain the structural parameters including the stoichiometric composition of the terminations (neutron data), and quantify the structural disorder which can be used to discriminate the phases with the best electrochemical properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|