Study of the insertion mechanism of lithium into anatase by operando X-ray diffraction and absorption spectroscopy

被引：19
|
作者：
Fehse, Marcus [1 ]
Monconduit, Laure [1 ]
Fischer, Florent [2 ]
Tessier, Cecile [2 ]
Stievano, Lorenzo [1 ]
机构：
[1] Univ Montpellier 2, ICG AIME UMR 5253, CC 1502, F-34095 Montpellier 5, France
[2] SAFT, Direct Rech, F-33074 Bordeaux, France
来源：
SOLID STATE IONICS | 2014年 / 268卷
关键词：
TiO2; Anatase; Lithium ion batteries (LIB); XANES; EXAFS; ELECTRODE MATERIALS; TIO2; ANATASE; ELECTROCHEMICAL PERFORMANCE; STRUCTURAL-CHANGES; ION BATTERIES; INTERCALATION; REACTIVITY; OXIDES;
D O I：
10.1016/j.ssi.2014.09.018
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：
Operando X-ray diffraction (XRD) and X-ray absorption (XAS) were used to study Li+ insertion into TiO2 anatase during electrochemical cycling in a Li cell. The evolution of long range order and local structure with the amount of lithium reacted were analyzed to identify and characterize the individual insertion domains. These results agree with a three-step insertion process, firstly solid solution, followed by characteristic bipliasic plateau corresponding to the transformation from tetragonal to orthorhombic phase which is succeeded by a monophasic insertion. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：252 / 255
页数：4
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