期刊
JOURNAL OF POWER SOURCES
卷 200, 期 -, 页码 83-91出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2011.10.085
关键词
Lithium ion batteries; Graphite anode; Surface modification; Solid electrolyte interphase (SEI); Nitrogen adsorption; Adsorptive potential distribution
资金
- German Ministry of Education and Research (BMBF) [03X4601A, LIB2015]
For graphitic carbons as anode materials in lithium ion batteries, the morphology and chemistry of the graphite surface have a significant impact on the formation of the solid electrolyte interphase (SEI), the corresponding irreversible charge losses, and the overall electrochemical anode performance. In this work the effects of graphite surface modification, induced by an elevated temperature treatment, on the SEI formation are discussed in details. Morphology changes due to burn-off of carbon are investigated by Raman spectroscopy and nitrogen adsorption measurements, which are not only used to calculate the BET specific surface area but also for the estimation of the absolute and relative extents of the basal plane surface area and the non-basal plane surface area. In particular, the relation of the first cycle irreversible charge loss to the change of surface morphology, especially to the quantitative amounts of the different types of surfaces is highlighted. (C) 2011 Elsevier B.V. All rights reserved.
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