Journal
JOURNAL OF POWER SOURCES
Volume 119, Issue -, Pages 550-554Publisher
ELSEVIER
DOI: 10.1016/S0378-7753(03)00287-8
Keywords
Li intercalation; graphite anode; carbon disordering; solid electrolyte interphase (SEI)
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The structural stability of graphite electrodes in Li-ion cells, which were cycled at room temperature and 60 degreesC was investigated. We observed gradual structural degradation of the graphite, which was most pronounced on the electrode surface but also extended into the bulk of the electrode. Graphite particles close to the Cu current collector remained almost unchanged, whereas those close to the electrode/electrolyte interface suffered significant structural damage. Structural degradation of the graphite led to an increased anode surface reactivity vs. the electrolyte. A thick layer of inorganic products from side reactions was observed on the disordered carbon areas of the anode. (C) 2003 Elsevier Science B.V All rights reserved.
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