| 改进的碳热还原法合成LiFePO_4/C材料 |
| |
| 引用本文： | 尹艳红,李少玉,闫琳琳,张会双,杨书廷.改进的碳热还原法合成LiFePO_4/C材料[J].中国有色金属学会会刊,2012,22(3):621-626. |
| |
| 作者姓名： | 尹艳红 李少玉 闫琳琳 张会双 杨书廷 |
| |
| 作者单位： | 河南师范大学化学与环境科学学院;河南省动力电源及关键材料工程技术研究中心;河南师范大学物理与信息工程学院 |
| |
| 基金项目： | Project(21001041) supported by the National Natural Science Foundation of China;Project(102300410256) supported by Henan Province Foundation and Advanced Technology Research Program,China;Project(102102210183) supported by the Key Scientific and Technological Research Project of Henan Province,China;Project(2011B480005) supported by the Natural Science Research Project of Henan Province,China |
| |
| 摘 要： | 采用LiAc·2H2O作为锂源,利用熔盐碳热还原方法在较低的烧结温度和较短的烧结时间内(650℃,4h)合成纯相LiFePO4/C材料。扫描电镜照片显示这种方法合成的材料粒径大约为1μm,小于用Li2CO3作为锂源合成的材料。电化学测试表明,采用LiAc·2H2O作为锂源合成的材料表现出了高的放电容量和良好的倍率循环性能:在0.5C和5C倍率下,其首次放电容量分别为148mA.h/g和115mA.h/g;50次循环后,容量保持率分别为93%和89%。
|
| 关 键 词： | LiFePO4/C 熔盐 碳热还原 β-环糊精 |
| 收稿时间： | 10 January 2011 |
Modified carbothermal reduction method for synthesis of LiFePO4/C composite |
| |
| YIN Yan-hong,LI Shao-yu,YAN Lin-lin,ZHANG Hui-shuang,YANG Shu-ting.Modified carbothermal reduction method for synthesis of LiFePO4/C composite[J].Transactions of Nonferrous Metals Society of China,2012,22(3):621-626. |
| |
| Authors: | YIN Yan-hong LI Shao-yu YAN Lin-lin ZHANG Hui-shuang YANG Shu-ting |
| |
| Affiliation: | 1,2 1.College of Chemistry and Environmental Science,Henan Normal University,Xinxiang 453007,China 2.Henan Engineering Research Center of Motive Power and Key Materials,Xinxiang 453007,China;3.College of Physics and Information Engineering,Henan Normal University,Xinxiang 453007,China |
| |
| Abstract: | With LiAc-2H2O as Li precursor,pure olivine phase LiFePO4/C was synthesized at a relatively low temperature(650 ℃) and short sintering period(4 h) by molten salt carbothermal reduction method.Scanning electron micrograph shows that particle size of the product is about 1μm,smaller than that of the sample synthesized with Li2CO3 as Li precursor.Electrochemical measurements prove that LiFePO4/C obtained from LiAc-2H2O shows high capacity.The initial discharge capacities are 148 mA-h/g at 0.5C rate and 115 mA-h/g at 5C rate,respectively.After 50 cycles,the capacity retention ratios are 93% and 89% at 0.5C rate and 5C rate,respectively. |
| |
| Keywords: | LiFePO4/C composite molten salt carbothermal reduction β-cyclodextrin |
| 本文献已被 CNKI 维普 ScienceDirect 等数据库收录！ |
|
