以油酸钠为钠源和碳源制备Na3V2(PO4)3/C及其电化学性能  

Preparation and Electrochemical Properties of Na3V2(PO4)3/C using Sodium Oleate as Sodium and Carbon Sources

作　　者：徐晓宁 李娇娇 王飞[1,2] Xu Xiaoning;Li Jiaojiao;Wang Fei(School of Chemistry and Materials Science,Huaibei Normal University,Huaibei,Anhui 235000,China;Information College,Huaibei Normal University,Huaibei,Anhui 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]淮北师范大学信息学院,安徽淮北235000

出　　处：《广东化工》2020年第8期8-10,共3页Guangdong Chemical Industry

基　　金：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);安徽省自然科学基金项目(1908085MB46)。

摘　　要：以油酸钠兼做钠源与碳源,分别采用球磨法、溶胶-凝胶法、水热法和水热辅助的溶胶-凝胶法制备前驱体,再经高温固相反应制备Na3V2(PO4)3/C复合正极材料。研究表明,前驱体制备方法对材料结晶性、形貌、颗粒尺寸和电化学性能具有显著影响。以球磨法制备前驱体得到的Na3V2(PO4)3/C具有最好的电化学活性,在10 C倍率下放电比容量达到99 mAh·g^?1,循环200次容量保持率达到88%。Na3V2(PO4)3/C cathode materials were prepared by a high-temperature solid state reaction using sodium oleate as sodium and carbon sources.The precursors were obtained by ball-milling,sol-gel,hydrothermal and hydrothermal-assisted sol-gel methods,respectively.It was found that the preparation method of precursor has an important impact on the crystallization,morphology,particle size and electrochemical performance.The Na3V2(PO4)3/C synthesized from ball-milling method exhibits the highest electrochemical activity.The discharge capacity is 99 mAh·g^?1 at 10C rate with a capacity retention of 88%after 200 cycles.

关 键 词：钠离子电池 Na3V2(PO4)3 油酸钠 

分 类 号：TQ152[化学工程—电化学工业]