锂离子电池铁酸锰负极材料的制备及电化学性能  

Preparation and Electrochemical Properties of MnFe_2O_4 as Anode Materials for Lithium Ion Batteries

作　　者：李静[1,2] 赵红晓[1,2] 刘富生[1,2] 徐慧芳[1,2] 

机构地区：[1]许昌学院新材料与能源学院,河南许昌461000 [2]许昌学院河南省微纳米能量储存与转换材料重点实验室,河南许昌461000

出　　处：《有色金属工程》2016年第5期5-8,共4页Nonferrous Metals Engineering

基　　金：河南省科技厅科技攻关项目(122102210479)

摘　　要：以硝酸铁和氯化锰为原料,采用水热法制备铁酸锰(MnFe_2O_4)颗粒,研究不同实验条件对产物纯度的影响。采用X射线衍射仪(XRD)、扫描电镜(SEM)等手段对材料的微观结构和形貌进行表征。采用电化学分析手段分析材料的电化学性能。结果表明,碱性条件下,当铁锰的摩尔比为2∶1,反应温度160℃,反应时间3 h时,可以制备出具有尖晶石结构的铁酸锰颗粒。该材料作为锂离子电池负极材料具有优异的电化学性能:首次充放电比容量为1 309 m A·h/g,100次循环后放电比容量稳定在160 m A·h·/g。MnFe2O4 powder was synthesized by hydrothermal method with ferric nitrate and manganese chloride as raw materials. The influences of the experimental conditions on the purity of MnFe2O4 were studied. The purity and morphology of materials obtained by this process were characterized by X-ray diffraction（ XRD） and scanning electron microscope（ SEM） methods. The electrochemical performance of MnFe2O4 materials were investigated by electrochemical analysis means.The results show that MnFe2O4 materials can be obtained under the conditions of the solution being alkaline,the mole ratio of the raw materials being of 2∶ 1,the reaction temperature being of 160 ℃ and the reaction duration being of 3 hours. The excellent electrochemical properties can be obtained with MnFe2O4 used as the active materials of anode. The discharge specific capacity of the first time is 1 309 m A·h / g and the reversible capacity reaches 160 m A·h / g after 100 cycles.

关 键 词：水热法 铁酸锰 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]