Calcination Temperature Effects on the Electrochemical Performance of Li2MnSiO4/C Cathode Material for Lithium Ion Batteries

被引:6
|
作者
Wei Yi [1 ]
Wang Li-Juan [1 ]
Yan Ji [1 ]
Sha Ou [1 ]
Tang Zhi-Yuan [1 ]
Ma Li [2 ]
机构
[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
[2] McNair Technol Co Ltd, Dongguan 523800, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Lithium ion battery; Cathode material; Li2MnSiO4; Solution method; Calcination temperature; LI2FESIO4; MN; FE; INTERCALATION; PHOSPHATES; OLIVINES; NI; CO;
D O I
10.3866/PKU.WHXB20111124
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
As a new potential cathode material for lithium ion batteries, Li2MnSiO4/C was synthesized by a solution method. The thermal behavior of the precursor for Li2MnSiO4/C was measured by thermogravimetric (TG) analysis and the range of calcination temperatures from 600 to 800 degrees C was determined. X-ray powder diffraction (XRD) patterns indicated that all the Li2MnSiO4/C samples crystallized in an orthorhombic structure with space group Pmn2(1). The morphology and particle size of the samples were also characterized by scanning electron microscopy (SEM). The effects of calcination temperature on the electrochemical performance of Li2MnSiO4/C were studied using galvanostatic charge-discharge measurements at various current densities. The results showed that the sample prepared at 700 degrees C exhibited a much higher coulombic efficiency and better cyclic performance than the other samples.
引用
收藏
页码:2587 / 2592
页数:6
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