物理化学学报2011，Vol.27Issue(3)：609-614,6.
纺锤体形LiFePO4锂离子电池正极材料的制备与性能
Synthesis and Properties of Spindle-Shaped LiFePO4 for the Cathode Material of Lithium Ion Battery
摘要
Abstract
We synthesized LiFePO4 directly by a solvothermal method at low temperature and then a heat treatment was carried out to give a LiFePO4/C composite for using as a cathode in lithium ion battery. The crystal structure and the charge-discharge performance of the prepared samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD),Fourier transform infrared (FTiR) spectroscopy, and galvanostatic charge-discharge testing. The results indicated that the LiFePO4 synthesized at low-temperature (120 ℃) with glycerol as a solvent had a single olivine-type crystal structure and a spindle-shaped morphology with a very narrow size distribution. After heat treatment, a LiFePO4/C composite with excellent charge-discharge performance was obtained and the spindle morphology of the sample was intact. Galvanostatic charge-discharge tests showed that the prepared LiFePO4C cathode had an initial discharge specific capacity of 147.2 mAh· g-1 at 0.1C at room temperature and it was 136.3 mAh· g-1 after 50 cycles. The average discharge specific capacities of LiFePO4/C at 0.2C, 0.5C, and 1C were about 130, 120, and 108 mAh·g-1, respectively.关键词
锂离子电池/LiFePO4/纺锤体形/溶剂热法/充放电性能分类
化学化工引用本文复制引用
苏畅,陆国强,徐立环,张诚,马淳安..纺锤体形LiFePO4锂离子电池正极材料的制备与性能[J].物理化学学报,2011,27(3):609-614,6.基金项目
国家自然科学基金(51003095)和浙江省公益性技术应用研究计划(2010C331121)资助项目 （51003095）
