水热法制备锂离子电池正极材料LiFePO_4及其性能研究  

Hydrothermal preparation of LiFePO_4 as cathode material for Li-ion battery and its performance study

作　　者：赵本好 郁洁 

机构地区：[1]淮南万顺机电安装有限公司,安徽淮南232001 [2]淮南市第十四中学,安徽淮南232035

出　　处：《电池工业》2014年第4期174-177,共4页Chinese Battery Industry

摘　　要：利用水热法合成锂离子正极材料磷酸铁锂(LiFePO4)纯相,并以蔗糖为碳源对其进行碳包覆。采用X射线衍射光谱法(XRD)、扫描电子显微镜法(SEM)及恒流充放电测试仪(LAND),分别对合成样品的物相、晶胞参数、表面形貌及电化学性能进行测试与表征。实验结果表明:水热法制备的LiFePO4样品具有纯度高、粒径小、形貌规则等优点,且LiFePO4/C样品制备的电池循环寿命长且可逆性好。The pure phase LiFePO4 cathode material for Li-ion batteries was synthesized by hydro thermal method, and it was coated with carbon by using sucrose as carbon source. The crystal structure and electrochemical performances were characterized by XRD, SEM and electrochemical performance test（LAND）. The results showed that LiFePO4 sample was small particles of pure phase and regular sheets, and the batteries had long cyclic life and good reversibility using LiFe PO4/C sample.

关 键 词：水热法 磷酸铁锂 锂离子电池 电化学性能 循环寿命 

分 类 号：TM912.9[电气工程—电力电子与电力传动]