Characterization of the passivating layer on Li[Ni0.31Co0.32Mn0.28Al0.09]O2 cathode in the overcharge state

被引：17
|
作者：
Park, Yeonju [2 ,3 ]
Kim, Nam Hoon [2 ,3 ]
Cho, Sung Baek [4 ]
Kim, Jong Myung [4 ]
Kim, Gwui Cheol [5 ]
Kim, Min Soo [6 ]
Lee, Sung Man [7 ]
Eom, In-Yong [8 ]
Choi, Hyun Chul [1 ]
Jung, Young Mee [2 ,3 ]
机构：
[1] Chonnam Natl Univ, Dept Chem, Kwangju 500757, South Korea
[2] Kangwon Natl Univ, Dept Chem, Chunchon 200701, South Korea
[3] Kangwon Natl Univ, Inst Mol Sci & Fus Technol, Chunchon 200701, South Korea
[4] Agcy Def Dev, Taejon 305152, South Korea
[5] Jeonnam Nano Bio Res Ctr, Jeollanam Do 515806, South Korea
[6] Chonnam Natl Univ, Dept Stat, Kwangju 500757, South Korea
[7] Kangwon Natl Univ, Dept Adv Mat Sci & Engn, Chunchon 200701, South Korea
[8] Catholic Univ Daegu, Dept Life Chem, Gyongsan 712702, South Korea
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2010年 / 974卷 / 1-3期
关键词：
Solid electrolyte interface; Cathode-electrolyte interface; Overcharge; X-ray photoelectron spectroscopy; 2D correlation spectroscopy; RAY ABSORPTION-SPECTROSCOPY; SURFACE-FILM; ION-BATTERY; LITHIUM; BEHAVIOR; RAMAN; CARBONATE; MECHANISM; ELECTRODE; CAPACITY;
D O I：
10.1016/j.molstruc.2010.01.053
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 passivating layer (also called the solid electrolyte interface, SEI) plays a key role in the performances of Li-ion batteries. In this work, we studied the surface reactions of Li[Ni0.31Co0.32Mn0.28Al0.09]O-2 with the organic electrolyte in the overcharge state by means of FIR, XPS, XAS, and 2D correlation analysis. The FTIR and XPS results revealed that several types of compounds are formed on the cathode surface. These results also suggest that the organic solvents are decomposed to a greater extent than the Li-salt during the overcharge state. Based on the 2D correlation analysis, we can deduce the following sequence of events: 287.0 (due to C-O) -> 290.0 (due to carbonate) -> 288.5 (due to C=O) -> 291.5 (due to C-F-x) -> 284.5 eV (due to C-C or C-H). (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：139 / 143
页数：5
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