The first in situ 7Li nuclear magnetic resonance study of lithium insertion in hard-carbon anode materials for Li-ion batteries
| العنوان: | The first in situ 7Li nuclear magnetic resonance study of lithium insertion in hard-carbon anode materials for Li-ion batteries |
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| المؤلفون: | Michel Letellier, Frédéric Chevallier, François Béguin, Elzbieta Frackowiak, Jean-Noël Rouzaud, M. Morcrette, Jean-Marie Tarascon, Christian Clinard |
| المصدر: | The Journal of Chemical Physics. 118:6038-6045 |
| بيانات النشر: | AIP Publishing, 2003. |
| سنة النشر: | 2003 |
| مصطلحات موضوعية: | Materials science, Intercalation (chemistry), Analytical chemistry, General Physics and Astronomy, chemistry.chemical_element, Knight shift, Electrochemistry, Anode, Nuclear magnetic resonance, chemistry, Transmission electron microscopy, Electrode, Lithium, Graphite, Physical and Theoretical Chemistry |
| الوصف: | We show the first continuous in situ static 7Li nuclear magnetic resonance (NMR) experiment on a plastic lithium/carbon cell. The electrochemical cycling was successfully performed inside the magnet. We particularly studied the insertion/extraction of lithium in a material designed to be used as negative electrode in a secondary battery; hard carbon fibers treated to reduce the irreversible capacity (x=0.5). The reversible capacity is x=1.5 (in LixC6), higher than with graphite for which the saturating composition corresponds to the first stage intercalation compound LiC6 (x=1). Ex situ quantitative transmission electron microscopy gives a statistical description of the fibers; a core made of disorganized carbon coated by better organized pyrocarbon. Crossed with the values of capacity given by the current generator, in situ NMR indicates the chronology of the insertion. From the observed data, we propose that a Li–C metallic alloy is formed. By comparing the Knight shift with that of metal (Li0), we esti... |
| تدمد: | 1089-7690 0021-9606 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::91cebb661e7acb7c53e0f7264a534420 https://doi.org/10.1063/1.1556092 |
| رقم الأكسشن: | edsair.doi...........91cebb661e7acb7c53e0f7264a534420 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 10897690 00219606 |
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