Combustion synthesis and electrochemical performance of Li2FeSiO4/C cathode material for lithium-ion batteries

被引：44

作者：

Dahbi, Mohammed ^{[1
]}

Urbonaite, Sigita ^{[1
]}

Gustafsson, Torbjorn ^{[1
]}

机构：

[1] Uppsala Univ, Angstrom Adv Battery Ctr, Dept Chem Mat, SE-75121 Uppsala, Sweden

来源：

JOURNAL OF POWER SOURCES | 2012年 / 205卷

基金：

瑞典研究理事会;

关键词：

Lithium-ion batteries; Lithium iron orthosilicate; Combustion synthesis; ELECTRODE MATERIAL; TEMPERATURE; BEHAVIOR; LIFEPO4;

D O I：

10.1016/j.jpowsour.2012.01.079

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：

A novel preparation technique was developed for synthesizing Li2FeSiO4/C nanoparticles through combustion of reaction mixtures containing silicon source. Li and Fe sources that operate as oxidizers and sucrose that act as a fuel. A systematic investigation of the synthesis parameters, such as the effect of the fuel content, on purity, morphology and electrochemical properties of the samples was performed. The samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), specific surface area (BET) and electrochemical measurements, respectively. Among the synthesized cathode materials, Li2FeSiO4 obtained with 1.5 mol of sucrose, showed the best electrochemical performance in terms of discharge capacity, cycling stability and rate capability. Discharge capacity of 130 mAh/g at C/20, 88 mAh/g at C/2 and 44 mAh/g at 2C were obtained with no capacity fading after 50 cycles. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：456 / 462

页数：7

共 22 条

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