焙烧温度对Li_2FeSiO_4前驱体Li_2SiO_3性能的影响（英文）

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 21; no. 3; pp. 529 - 534
Main Author 李向群 郭华军 李黎明 李新海 王志兴 欧惠 向楷雄
Format Journal Article
LanguageEnglish
Published 2011
Subjects
Li2FeSiO4
Li2SiO3
溶胶-凝胶法
锂离子电池
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Bibliography:43-1239/TG
lithium ion batteries; Li2FeSiO4; Li2SiO3; sol-gel method
Li2SiO3 was synthesized by combination of sol-gel method and calcination at high temperature using Li2CO3, HNO3, Si（OC2H5）4 and C2H5OH as starting materials. The effects of calcination temperature and refluxing system on the composition and properties of lithium silicate were investigated. The samples were characterized by TGA/DTA, XRD, SEM and particle size analysis. Li2FeSiO4 was prepared by the solid-state reaction between Li2SiO3 and FeC2O4·2H2O. The XRD patterns show that the use of refluxing system in the sol-gel preparation can decrease the Li2Si2O5 and Li4SiO4 impurities in the Li2SiO3 sample. The calcination temperature plays an important role in the properties of the Li2SiO3 samples. The sample calcined at 700 °C has high purity of 97% Li2SiO3 and good morphology as precursor of Li2FeSiO4. It consists of primary particles with size of 1-3 μm, and the primary particle clusters form agglomerates with loose and porous appearance.
LI Xiang-qun1, GUO Hua-jun2, LI Li-ming2, LI Xin-hai2, WANG Zhi-xing2, OU Hui2, XIANG Kai-xiong2 1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China
ISSN:1003-6326