Investigation of inorganic compounds on the surface of cathode materials using Li and OK-edge XANES

被引：32

作者：

Kobayashi, Hironori ^{[1
]}

Emura, Shuichi ^{[2
]}

Arachi, Yoshinori ^{[3
]}

Tatsumi, Kuniaki ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Ubiquitous Energy Devices, Osaka 5638577, Japan

[2] Osaka Univ, ISIR, Osaka 5670047, Japan

[3] Kansai Univ, Fac Engn, Unit Chem, Osaka 5648680, Japan

来源：

JOURNAL OF POWER SOURCES | 2007年 / 174卷 / 02期

关键词：

layered oxides; cathode materials for lithium secondary batteries; synchrotron radiation; XANES method;

D O I：

10.1016/j.jpowsour.2007.06.135

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：

Inorganic compounds on the surfaces of the cathode materials LiNi0.80Co0.15Al0.05O2 and LiCoO2 were studied using Li and O K-edge X-ray absorption near edge structure (XANES) measurements. Rietveld analysis revealed that the LiNi0.80Co0.15Al0.05O2 sample contained 2% Li2CO3, while the LiCoO2 sample was single-phase. The Li and O K-edge XANES spectra indicated that the surface of LiCoO2 was almost free of residual Li2CO3. In contrast, the presence of both residual Li2CO3 and an additional cubic phase were observed, respectively, on and near the surface of LiNi0.80Co0.15Al0.05O2. These results demonstrate that the XANES technique, using a combination of the total electron yield and fluorescence methods, is an effective tool for probing the surfaces of cathode materials. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：774 / 778

页数：5

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