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Ramireddy, T., Sharma, N., Xing, T., Chen, Y., Leforestier, J. & Glushenkov, A. M. (2016) Size and Composition Effects in Sb-Carbon Nanocomposites for Sodium-Ion Batteries. ACS Appl. Mater. Interfaces, 8 30152–30164.
Added by: Richard Baschera (2016-12-14 14:48:52) Last edited by: Richard Baschera (2016-12-14 15:55:25) |
| Type de référence: Article DOI: 10.1021/acsami.6b09619 Numéro d'identification (ISBN etc.): 1944-8244 Clé BibTeX: Ramireddy2016 Voir tous les détails bibliographiques  |
Catégories: HORSIMN, INTERNATIONAL Mots-clés: alloy anodes, Anode, antimony, Ball milling, Electrochemical properties, graphite, high-performance anode, Li-ion, microspheres, raman-spectroscopy, size, sodium-ion battery, solid-electrolyte interphase, volume-change Créateurs: Chen, Glushenkov, Leforestier, Ramireddy, Sharma, Xing Collection: ACS Appl. Mater. Interfaces |
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| Résumé |
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Sodium-ion batteries are in the spotlight as viable alternatives to lithium-ion batteries in stationary storage and power grid applications. Among possible anode materials, Sb is one of the interesting candidates due to a combination of battery-type potential plateaus in the charge-discharge profiles, high capacity (theoretical capacity of 660 mAh g(-1)) and demonstrated good cyclic stability. The influence of Sb particle size (particularly at the nanoscale range) and the composition of Sb-carbon composites on the electrode performance, stability, and charge storage mechanism is systematically evaluated here for the first time. A range of Sb-carbon nanocomposites with varied Sb particle size (between 50 and similar to 1 nm) are studied. The control of the particle size is achieved via varying the carbon and Sb weight ratio in the precursors. The shape of charge-discharge profiles, hysteresis, and the difference in cyclic stabilities and rate performance are analyzed. The nanocomposite with the smallest particle size (similar to 1 nm) and the largest carbon content provides the most stable cyclic behavior and a better rate capability but suffers from an increased hysteresis between charge and discharge curves. In situ synchrotron X-ray diffraction experiments indicate that the storage mechanism in the Sb-carbon nanocomposites containing Sb nanoparticles is different from the electrodes with bulkier, micron-sized Sb particles, and the electrochemical reaction proceeds through a number of crystalline intermediates.
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