Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 67, Issue 5-6, Pages 1228-1232Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2006.01.088
Keywords
nanostructures; vapour deposition; nuclear magnetic resonance (NMR); electrochemical properties
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We present a continuous static Li-7 Nuclear Magnetic Resonance (NMR) experiment on a lithium/carbon battery while it is being charged and discharged. Two kinds of batteries are tested: one with a graphite electrode, the other with a carbon/carbon composite electrode. With graphite, all the intercalation stages give a NMR signature, even the early stages, difficult to isolate usually. The random, initial stage 1' seems to occur all over the intercalation process. The response of the carbon/carbon composite electrode is quite different: it confirms the lack of a regular graphene structure and shows a slower diffusion for most of the lithium. The carbon black added for conductivity improvement does not appear to store lithium. (c) 2006 Elsevier Ltd. All rights reserved.
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