超细磷酸铁的制备及其电化学性能研究  

Study on preparation and electrochemical of ultrafine FePO_4

作　　者：郑典模[1] 潘鹤政 伍丽萍 陈骏驰[1] 彭静红[1] 

机构地区：[1]南昌大学环境与化学工程学院,江西南昌330031 [2]江西恒兴源化工有限公司,江西丰城331100 [3]江西省工业安全工程技术研究中心,江西南昌330030

出　　处：《电源技术》2015年第1期58-61,共4页Chinese Journal of Power Sources

摘　　要：对传统的均相沉淀法进行合理改进,以FeSO4·H2O为铁源,H3PO4为磷源,引入乙醇-水体系,制备Fe PO4。根据前期单因素实验结果,对影响较大的工艺条件进行正交实验设计和分析,最终确定制备Fe PO4的最佳工艺条件。用自制超细磷酸铁加碳采用高温固相碳热还原法制备超细LiFePO4/C复合材料,采用扫描电子显微镜法(SEM)、X射线衍射光谱法(XRD)、比表面积、振实密度和粒度分布等手段进行表征,并进行电化学性能测试。结果表明样品是性能良好的锂电池正极材料。A reasonable improvement on traditional homogeneous precipitation method was made. In order to prepared FePO4, FeSO4-7H20 was used as the iron source, H3PO4 was used as phosphorus source, and the ethanol- water system was introduced. According to the results of previous single factor experiment, the orthogonal experiment design was proceed and the major influence process conditions were analyzed, then the optimal conditions were ultimately determined. Then LiFePO4/C was prepared by high-temperature carbon thermal reduction with the homemade ultrafine FePO4 and carbon. The products were characterized by SEM, XRD, BET, tap density and the particle size distribution, and tested by the electrochemical method. The detection result shows that the sample is a good performance of lithium battery cathode material.

关 键 词：磷酸铁 磷酸铁锂 均相沉淀法 乙醇-水体系 高温固相碳热还原法 

分 类 号：TM912.9[电气工程—电力电子与电力传动]