锂离子电池正极材料Li_3V_2(PO_4)_3的合成与性能研究  

Study on Synthesis and Electrochemical Characteristics of Li-ion Battery Cathode Material Li_3V_2(PO_4)_3

作　　者：邵重阳[1] 许云华[1] 王娟[1] 周志斌[1] 

机构地区：[1]西安建筑科技大学机电工程学院,陕西西安710055

出　　处：《热加工工艺》2011年第10期113-115,共3页Hot Working Technology

摘　　要：以LiAc.2H2O、V2O5、NH4H2PO4、蔗糖和乙二醇为原料,采用液相多元醇法合成了锂离子电池正极材料Li3V2(PO4)3,研究了烧结温度对产物电化学性能的影响。XRD、SEM和充放电测试表明:在800℃下烧结10 h合成的样品为单斜晶系;在0.1C、3.0～4.3 V下充放电的首次放电比容量为126 mAh.g-1,第20次循环的比容量为120 mAh.g-1。Li-ion battery cathode material Li3V2（PO4）3 was synthesized by liquid phase polyol method using LiAc·2H2O,V2O5,NH4H2PO4,sucrose and ethylene glycol as raw material.The effects of sintering temperature on the electro-chemical properties of the sample were studied.The XRD,SEM and charge-discharge tests show that the sample sintered at 800 ℃ for 10 h has a single monoclinic structure,when charge-discharge at 0.1C and the voltage of 3.0～4.3V,its initial specific discharge capacity is 126 mAh·g-1,the specific capacity at the 20 th cycle is 120 mAh·g-1.

关 键 词：磷酸钒锂 正极材料 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]