ZnMn2O4多孔球的制备及其储锂性能研究  

Preparation and Lithium Storage Performance of ZnMn2O4 Porous Spheres

作　　者：王飞 陈盛 李星月 汪燕鸣[1] Wang Fei;Chen Sheng;Li Xingyue;Wang Yanming(Huaibei Normal University,Huaibei 235000,China)

机构地区：[1]淮北师范大学信息学院,安徽淮北235000

出　　处：《廊坊师范学院学报（自然科学版）》2020年第4期42-45,共4页Journal of Langfang Normal University(Natural Science Edition)

基　　金：安徽省自然科学基金项目(1908085MB46);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Zn(CH3COO)2·2H2O和Mn(CH3COO)2·4H2O为原料,NH4HCO3为沉淀剂,通过溶剂热法在乙二醇介质中合成球形ZnMn2(CO3)3亚微米颗粒,经热分解后获得ZnMn2O4多孔球。采用X射线衍射仪、扫描电子显微镜和透射电子显微镜分析材料的晶体结构和形貌微结构。电池测试表明,ZnMn2O4作为锂离子电池负极材料,在4 A·g^-1的高电流密度下具有411 mAh·g^-1的放电比容量,在0.2 A·g^-1电流密度下循环200次后容量保持率高达97%,其良好的倍率性能和循环稳定性得益于亚微米颗粒尺寸和丰富的多孔结构。The ZnMn2O4 porous spheres were prepared by the thermolysis of ZnMn2(CO3)3 submicroparticles synthesized using a solvothermal method in ethylene glycol medium.The raw materials are Zn(CH3COO)2·2 H2O,Mn(CH3COO)2·4 H2O,and NH4HCO3.The crystal and microstructure were analyzed by X-ray diffraction,scanning electron microscope,and transmission electron microscopy.The cell tests indicate that the ZnMn2O4 porous spheres,as anode materials for lithium ion batteries,display a discharge capacity of 411 mAh·g^-1 at a high current density of 4 A·g^-1 and a capacity retention of 97%after200 cycles at 0.2 A·g^-1.the outstanding rate capability and cycling stability could be attributed to the submicron particle size and rich porous structure.

关 键 词：锂离子电池 ZnMn2O4 多孔球 负极材料 

分 类 号：TQ152[化学工程—电化学工业]