Lithium iron silicate sol-gel synthesis and electrochemical investigation

被引：20

作者：

Oghbaei, Morteza ^{[1
]}

Baniasadi, Fazel ^{[1
]}

Asgari, Sirous ^{[1
]}

机构：

[1] Sharif Univ Technol, Dept Mat Sci & Engn, Azadi Ave,POB 11155-9466, Tehran, Iran

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 672卷

关键词：

Lithium iron silicate; Lithium ion battery; Sol gel synthesis; BATTERY CATHODE MATERIALS; ION BATTERIES; LI2FESIO4/C CATHODE; PERFORMANCE; MN; LI2MNSIO4; FE;

D O I：

10.1016/j.jallcom.2016.02.113

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：

Li2FeSiO4 was synthesized through Sol-Gel method and the effect of calcination temperature, time and chelating agent concentration were investigated. Appropriate calcination temperature above 550 degrees C was determined by TG/DTA analysis. Afterward, the dried gel powder was calcined at each temperature of 650 degrees C, 700 degrees C and 750 degrees C for 1, 2 and 3 h. XRD studies illustrated the most appropriate calcination temperature of 700 degrees C for 1 h. To compare the effect of chelating agent concentration, citric acid with molar ratio of 1/3, 2/3 and 1 were used which 1/3 was determined as the best concentration. FE-SEM observation showed that mean grain is size lower than 100 nm. By using this material, a three electrodes test cell was assembled and its electrochemical properties were investigated. The results showed high charge capacity which could be achieved at current density of 0.05C. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：93 / 97

页数：5

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