摘要
通过对原料二水磷酸铁的预包覆处理,合成碳包覆磷酸铁锂材料。采用了X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等手段对合成的磷酸铁锂材料结构和微观形貌进行表征,同时考察了其电化学性能。结果表明,对磷酸铁进行碳预包覆能有效提高最终合成产物的电化学性能,在对磷酸铁原料进行1.34%碳含量的包覆后,以此为原料合成磷酸铁锂材料,得到的磷酸铁锂材料含碳量为2.38%时,10C放电容量达到120.7mAh/g。
To improve the performance of LiFePO4,carbon pre-coated FePO4·2H2O was used to synthesize LiFePO4/C by solid-state method.The samples were characterized by XRD,SEM,TEM,charge/discharge test and carbon analysis.The results indicated that the prepared samples with 2.38 wt% carbon content had better electrochemical performance of about a specific capacity of 120.7 mAh/g at 10C rate while FePO4 with 1.34 wt% carbon content was introduced.
出处
《金属功能材料》
CAS
2013年第1期54-57,共4页
Metallic Functional Materials
基金
国家863计划项目(NO.2012AA110407)资助
关键词
磷酸铁锂
前驱体
碳包覆
电化学性能
lithium iron phosphate
precursor
carbon coating
electrochemical performance
