In-situ Fourier transform infrared spectroscopic analysis on dynamic behavior of electrolyte solution on LiFePO4 cathode

被引：51
作者：
Akita, Yasuhiro [1 ]
Segawa, Midori [1 ]
Munakata, Hirokazu [1 ]
Kanamura, Kiyoshi [1 ]
机构：
[1] Tokyo Metropolitan Univ, Grad Sch Urban Environm Sci, Dept Appl Chem, Hachioji, Tokyo 1920397, Japan
来源：
JOURNAL OF POWER SOURCES | 2013年 / 239卷
关键词：
Lithium-ion battery; Lithium iron phosphate; In-situ Fourier transform infrared spectroscopy; Thin film electrode; Decomposition product; THIN-FILM ELECTRODE; RECHARGEABLE LITHIUM BATTERIES; CARBONATE SOLUTION INTERFACE; LI-ION BATTERIES; ELECTROCHEMICAL OXIDATION; NONAQUEOUS ELECTROLYTE; PROPYLENE CARBONATE; COATED LIFEPO4; SURFACE-FILM; LICOO2;
D O I：
10.1016/j.jpowsour.2013.03.134
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The dynamic behavior of 1.0 mol dm(-3) LiPF6 in ethylene carbonate (EC) and diethyl carbonate (DEC) mixed solvent (1:1 in volume) on lithium iron phosphate (LiFePO4) thin film electrode fabricated by RF-sputtering was investigated by in-situ Fourier transform infrared (FT-IR) spectroscopy. The solvation and desolvation reactions of EC and DEC with Li+ ion were observed in the charge and discharge processes of thin film electrode, respectively. In addition, the adsorption of solvent molecules on the electrode surface was suggested by polarized IR analyses. Lithium alkylcarbonate, lithium carboxylate and lithium carbonate were formed as decomposition products of the electrolyte solution at the anodic potential more than 4.5 V vs. Li/Li+. (C) 2013 Elsevier B.V. All rights reserved.
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收藏
页码：175 / 180
页数：6
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