油酸辅助固相法合成Na3V2(PO4)3/C及其电化学性能  

Electrochemical Performance of Na3V2(PO4)3/C Synthesized by An Oleic Acid-Assisted Solid-Phase Method

作　　者：李娇娇 王飞[2] Li Jiaojiao;Wang Fei(Huaibei Normal University,Huaibei 235000,China)

机构地区：[1]淮北师范大学化学与材料科学学院,安徽淮北235000 [2]淮北师范大学,安徽淮北235000

出　　处：《廊坊师范学院学报（自然科学版）》2020年第3期37-40,共4页Journal of Langfang Normal University(Natural Science Edition)

基　　金：安徽省自然科学基金项目(2008085MB34);安徽高校自然科学研究项目(KJ2018ZD058);安徽高校优秀青年人才支持计划项目(gxyqZD2019096)。

摘　　要：以油酸为表面活性剂,乙酸钠、磷酸二氢铵和偏钒酸铵为原料,通过球磨法混料和高温固相反应法制备了一次颗粒尺寸约50~300 nm且颗粒分散性好的Na3V2(PO4)3/C复合正极材料。电化学测试表明,Na3V2(PO4)3/C在1C倍率下可逆放电容量为109 mAh·g^-1,40C高倍率下的放电容量达到98 mAh·g^-1,表现出优异倍率性能;在10C倍率下循环1500次容量保持率达到93%,表现出优异的循环可逆性,有望用于高性能钠离子电池。Well-dispersed Na3V2(PO4)3/C composite materials with primary particle sizes of ca.50~300 nm were prepared by a ball-milling solid-phase method assisted with surfactant agent(oleic acid)using sodium acetate,ammonium dihydrogen phosphate,and ammonium vanadate as raw materials.The electrochemical tests indicate that the Na3V2(PO4)3/C delivers discharge capacities of 109 and 98 mAh·g^-1 at 1C and 40C,respectively,illustrating outstanding rate capability.The capacity retention reaches 93%at 10C after 1500 cycles,indicating superior cycling reversibility.The as-prepared electrode material is promising for high performance sodium ion batteries.

关 键 词：钠离子电池 Na3V2(PO4)3 表面活性剂 正极材料 

分 类 号：TQ152[化学工程—电化学工业]