Journal
JOURNAL OF POWER SOURCES
Volume 205, Issue -, Pages 439-448Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.01.067
Keywords
Lithium ion batteries; Electrolytes; Propylene carbonate
Funding
- DOE
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The cycling performance of LiPF4(C2O4) (LiFOP) electrolyte with propylene carbonate (PC) as a cosolvent is compared with LiPF6 electrolyte with ethylene carbonate (EC) as a cosolvent in the presence of different cathode materials, such as LiNi1/3Co1/3Mn1/3O2 and LiFePO4. The cycling performance of cells with LiFOP and PC is similar to cells with LiPF6 with EC at room temperature and superior at low temperature(-10 degrees C). After thermal abuse the room temperature performance of cells with LiFOP electrolyte and PC is worse than cells with LiPF6 and EC. A detailed analysis of the surface films on both the anode and the cathode via X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and Fourier transfer infrared spectroscopy (FT-IR) in the attenuated total reflection (ATR) mode was conducted to provide a better understanding of performance differences. (C) 2012 Elsevier B.V. All rights reserved.
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