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

页码：252 / 255

页数：4

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