磷酸钒锂材料及全钒锂离子电池性能研究  

STUDY ON Li_3V_2(PO_4)_3 AND ALL-VANADIUM LITHIUM-ION BATTERIES

作　　者：杨改[1] 应皆荣[1,2] 姜长印[1] 高剑[1] 万春荣[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京102201 [2]宁波工程学院化学工程学院,浙江宁波315016

出　　处：《华南师范大学学报（自然科学版）》2009年第A02期8-9,共2页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50772057);国家重点基础研究发展规划资助项目(2007CB209707)

摘　　要：采用溶胶凝胶、喷雾干燥、碳热还原法合成了球形Li3V2(PO4)3材料.与金属锂配对组成半电池时,Li3V2(PO4)3在4 V和2 V附近都有明显的充放电电压平台,分别对应于V4+/V3+和V3+/V2+电对.同时以Li3V2(PO4)3作为正负极材料,组装成2 V级全钒锂离子电池.对该电池在1.5～3.0 V范围内进行充放电测试,结果表明,该全钒锂离子电池具有优良的电化学性能.全钒锂离子电池可能成为磷酸钒锂材料应用的新领域.Spherical Li3V2 （PO4 ）3 powder was synthesized via melting V2O5 and quenching followed by spray drying and carbothermal reduction processes. Electrochemical measurements conducted in half cells with Li3V2 （PO4） 3 as the cathode material and lithium metal as the anode, have shown that there are obvious charge - discharge voltage plateaus at around 2.0 V and 4. 0 V, corresponding to V4＋/V3＋ and V3＋/V2＋ redox couple respectively. AU - vanadium lithium - ion batteries with open circuit voltage of about 2. 0 V were assembled by using Li3V2（PO4） 3 as both cathode and anode materials. Electrochemical measurement was carded out at cutoff volt- age of 1.5 -3.0 V. The batteries showed good electrochemical performance. Li3V2 （PO4）a electrode materials are very promising to be used in all - vanadium lithium - ion batteries.

关 键 词：LI3V2(PO4)3 全钒锂离子电池 电化学性能 

分 类 号：TN912.9[电子电信—通信与信息系统]