Synthesis of Nanostructured Li2FeSiO4/C Cathodes for Lithium-Ion Batteries by a mild Condition
Nanosphere-like Li2FeSiO4/C is synthesized via a solution method using sucrose as carbon sources under a mild condition of time-saving and energy-saving,followed by sintering at high temperature for crystallization.The amount of carbon in these composites is less than 10 wt.%,and the X-ray diffraction experiment confirms that all samples are pure single phase indexed with the orthorhombic Pmn21 space group.The particle size of the Li2FeSiO4/C synthesized at 700 ℃ for 9 h is very fine and spherical-like with a size of 200 nm.The electrochemical performance of this material,including reversible capacity,cycle number,and charge-discharge characteristics,is tested.The cell of this sample can deliver a discharge capacity of 166 mA·h/g at the first three cycles.After 30 cycles,the capacity decreases to 158 mA·h/g,and the capacity retention is up to 95%.The results show that this facilited method can prepare nanosphere-like Li2FeSiO4/C composite with better electrochemical performance.
Lithium-ion batteries cathode material Li2FeSiO4/C solution method
Yang Rong Liu Xiaoyan Qu Ye Lie Jing JouHyeon Ahn
Department of Applied Chemistry, Xian University of Technology, Xian, 710048, China Department of Chemical and Biological Engineering and Engineering Research Institute, Gyeongsang Nat
国际会议
上海
英文
155-155
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）