| 镁离子掺杂对LiFePO4材料性能的影响 |
| |
| 引用本文： | 胡成林,代建清,戴永年,易惠华.镁离子掺杂对LiFePO4材料性能的影响[J].昆明理工大学学报(理工版),2007,32(2):26-29. |
| |
| 作者姓名： | 胡成林 代建清 戴永年 易惠华 |
| |
| 作者单位： | 昆明理工大学,材料与冶金工程学院,云南,昆明,650093;昆明理工大学,真空冶金国家工程实验室,云南,昆明,650093 |
| |
| 摘 要： | 为了提高LiFePO4的电化学性能,用Mg2 对LiFePO4进行掺杂,以Li3PO4为锂源、Mg(OH)2为掺杂源,采用固相法合成锂离子电池正极材料Li1-xMgxFePO4(x=0.005、0.01、0.02和0.03).通过X射线衍射分析及电化学测试,研究了Mg掺杂对材料的结构和电化学性能的影响.实验研究表明,掺入少量的Mg2 ,可以减小晶胞体积,提高LiFePO4的循环性能和比容量.当Mg的掺入量为2 mol%时,以0.1C倍率充放电,Li0.98Mg0.02FePO4最大放电容量为123.6 mAh/g.
|
| 关 键 词： | 锂离子电池 LiFePO4 镁离子 |
| 文章编号： | 1007-855X(2007)02-0026-04 |
| 修稿时间： | 2006-11-11 |
Influence of Mg Ion Doping on Performance of LiFePO4 |
| |
| HU Cheng-lin,DAI Jian-qing,DAI Yong-nian,YI Hui-hua.Influence of Mg Ion Doping on Performance of LiFePO4[J].Journal of Kunming University of Science and Technology(Natural Science Edition),2007,32(2):26-29. |
| |
| Authors: | HU Cheng-lin DAI Jian-qing DAI Yong-nian YI Hui-hua |
| |
| Affiliation: | 1. Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2. National Engineering Laboratory of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China |
| |
| Abstract: | In order to improve the performance of LiFePO4,Li1-xMgxFePO4(x=0.005,0.01,0.02 and 0.03)with Mg2 dopant is prepared by solid state reaction using Li3PO4 as Lithium precursor and Mg(OH)2 as dopant source.The influence of Mg2 dopant on the structure and electrochemical performance of Li1-xMgxFePO4 material is investigated by X-ray diffraction and electrochemical tests.It is shown that low concentration Mg2 dopant can decrease the lattice volume and increase the capacity and cycle performances of LiFePO4.When the dopant concentration of Mg2 is 2 mol%,the maximum discharge capacity of Li0.98Mg0.02FePO4 is 123.6 mAh/g at 0.1C charge-discharge rates. |
| |
| Keywords: | Li-ion battery LiFePO4 magnesium ion |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
