In situ Raman study on the structural degradation of a graphite composite negative-electrode and the influence of the salt in the electrolyte solution

被引：25
|
作者：
Nakagawa, Hiroe [1 ]
Domi, Yasuhiro [1 ]
Doi, Takayuki [1 ]
Ochida, Manabu [1 ]
Tsubouchi, Shigetaka [1 ]
Yamanaka, Toshiro [1 ]
Abe, Takeshi [2 ]
Ogumi, Zempachi [1 ]
机构：
[1] Kyoto Univ, Off Soc Acad Collaborat Innovat, Kyoto 6110011, Japan
[2] Kyoto Univ, Grad Sch Engn, Nishikyo Ku, Kyoto 6158510, Japan
来源：
JOURNAL OF POWER SOURCES | 2013年 / 236卷
关键词：
Graphite; Electrolyte salt; Cell design; Raman spectroscopy; Lithium ion battery; BINARY SOLVENT SYSTEMS; LITHIUM-ION BATTERIES; ETHYLENE CARBONATE; LI-INTERCALATION; DECOMPOSITION; SPECTRUM;
D O I：
10.1016/j.jpowsour.2013.02.060
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：
Structural changes in the surface of graphite composite electrodes in the 1st charge/discharge cycle were studied by ex situ and in situ Raman spectroscopy. The influence of the salt in the electrolyte solution and the volume of this solution injected into electrochemical cells on the structural degradation of the graphite surface was investigated. The surface crystallinity of graphite was degraded in LiPF6-based electrolyte solution with only a cycle of intercalation/de-intercalation reactions of Li+, compared to that in a LiClO4-based electrolyte. In situ Raman measurements revealed that structural disordering of the graphite surface should occur in an early stage of the initial intercalation reaction of Li+ into graphite. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：138 / 144
页数：7
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