| Influence of synthesis parameters on the properties of LiFePO4/C cathode material☆ |
| |
| 作者姓名： | Zhengwei Xiao Yingjie Zhang Guorong Hu |
| |
| 作者单位： | 1.Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;2.School of Metallurgy and Environment, Central South University, Changsha 410083, China |
| |
| 基金项目： | the Natural Science Foundation of Yunnan Province(2010ZC051)，the Analysis and Testing Foundation(20140439)，the Starting Research Fund from Kunming University of Science and Technology(14118245) |
| |
| 摘 要： | The influence of sintering temperature,carbon content and dispersive agent in ball-milling was investigated on the properties of Li Fe PO_4/C prepared using Fe_2O_3,NH_4H_2PO_4,Li_2CO_3 and glucose via solid state reaction.X-ray powder diffraction,scanning electron microscopy and charge–discharge test were applied to the characterization of the Li Fe PO_4/C samples synthesized under different conditions.Sintering temperature affects the crystallite/particle size and degree of crystallinity of LiF eP O_4,formation of Fe_2 P and maintenance of carbon in LiF e PO_4/C.Carbon maintenance is favored by low sintering temperature,and 700 °C is optimum for synthesis of LiF eP O_4/C with superior electrochemical performance.A higher carbon content in the range of 4.48%–11.03% results in a better rate capability for Li Fe PO_4/C.The dispersive agent used in ball-milling impacts the existent state of carbon in the final product which subsequently determines its charge–discharge behavior.The sample prepared at700 °C by using acetone as the dispersive agent in ball-milling exhibits an excellent rate capability and capacity retention without any fade at 0.1C,1C and 2C,with corresponding average discharge capacities of 153.8,128.3and 121.0 m A·h·g~(-1),respectively,in the first 50 cycles.
|
| 关 键 词： | Composite Synthesis parameter Sintering temperature Carbon content Drying Dispersive agent |
| 收稿时间： | 2014-10-08 |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《中国化学工程学报》浏览原始摘要信息 |
|
点击此处可从《中国化学工程学报》下载全文 |
|
