文档介绍：第 21 卷第 1 期中国有色金属学报 2011 年 1 月
The Chinese Journal of Nonferrous Metals Jan. 2011
文章编号:1004-0609(2011)01-0125-06

球形磷酸铁锂正极材料制备中试研究

孙学磊,戴永年,姚耀春

(昆明理工大学真空冶金国家工程实验室,昆明 650093)

摘要:用湿法球磨−喷雾干燥法制备复合正极材料;用激光粒度分析仪、X 射线衍射仪、扫
描电镜和恒流充放电等对前驱体和磷酸铁锂样品进行表征;考察不同球磨工艺对磷酸铁锂颗粒形貌、粒度分布、
振实密度和电化学性能的影响。结果表明:用湿法球磨−喷雾干燥法可以制得球形颗粒、高振实密度且电化学性
能优良的磷酸铁锂正极材料,原料经粗磨后再超细球磨制得的材料性能更佳,振实密度达 g/cm3,在 C、
C 和 C 倍率下的首次放电比容量分别为 151、143 和 132 mA·h/g。
关键词:锂离子电池;LiFePO4;喷雾干燥;电化学性能
中图分类号:TM 文献标志码:A

Pilot scale production of spherical LiFePO4/C cathode material

SUN Xue-lei, DAI Yong-nian, YAO Yao-chun

(National Engineering Laboratory of Vacuum Metallurgy,
Kunming University of Science and Technology, Kunming 650093, China)

Abstract: cathode material was prepared by wet ball milling-spray drying method. The
precursors and LiFePO4 samples were characterized by laser particle size analyzer, XRD, SEM, and electrochemical
charge-discharge tests. The effects of different ball milling processes on the morphologies, particle size distribution, tap
density and electrochemical performance of LiFePO4 were investigated. The results show that spherical LiFePO4 with
high density and good electrochemical performance can be synthesized by wet ball milling–spray drying method, and
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