Intercalation and conversion reactions in Ni0.5TiOPO4 Li-ion battery anode materials

被引：35

作者：

Lasri, Karima ^{[1
]}

Dahbi, Mohammed ^{[2
]}

Liivat, Anti ^{[2
]}

Brandell, Daniel ^{[2
]}

Edstrom, Kristina ^{[2
]}

Saadoune, Ismael ^{[1
]}

机构：

[1] Univ Cadi Ayyad, FST Marrakech, LCME, Marrakech 40000, Morocco

[2] Uppsala Univ, ALISTORE ERI, Dept Chem Angstrom, SE-75121 Uppsala, Sweden

来源：

JOURNAL OF POWER SOURCES | 2013年 / 229卷

关键词：

Li-ion batteries; Anode materials; Ni0.5TiOPO4; Sol-gel; Conversion reaction; LITHIUM INSERTION; TITANIUM PHOSPHATES; ELECTRODES; PERFORMANCE;

D O I：

10.1016/j.jpowsour.2012.12.031

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 Ni0.5TiOPO4/C composite Li-ion battery anode material has been prepared by a sol-gel method with a subsequent pyrolysis step for the formation of C-coating. The resulting sub-micronsized particles displayed a narrow particle size distribution and a corresponding high electrochemical activity which, in turn, facilitates in-depth analysis of the electrochemical behavior of the material. It is shown that by limiting the degree of lithiation in the material, the redox potential in subsequent cycles is substantially affected. Ex-situ XRD reveals a gradual evolution of the structure during cycling of the material, with lower crystallinity after the first discharge cycle. By correlating the electrochemical properties with the structural studies, new insights into the electrochemical behavior of the Ni0.5TiOPO4/C anode material are achieved, suggesting a combination of intercalation and conversion reactions. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：265 / 271

页数：7

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