锰源对合成尖晶石锰酸锂的影响及电化学性能分析  

Effect of Manganese Source on Synthesis of Spinel Lithium Manganate and Analysis of Electrochemical Performance

作　　者：崔勇 唐啸虎 邵忠财[1] 邵鸿媚 张伟 李学田 董华 CUI Yong;TANG Xiaohu;SHAO Zhongcai;SHAO Hongmei;ZHANG Wei;LI Xuetian;DONG Hua(Shenyang Ligong University,Shenyang 110159,China;Northwest Industries Group Co.,Ltd.,Xi’an 710043,China)

机构地区：[1]沈阳理工大学环境与化学工程学院,沈阳110159 [2]西北工业集团有限公司,西安710043

出　　处：《沈阳理工大学学报》2024年第3期70-75,89,共7页Journal of Shenyang Ligong University

基　　金：国家自然科学基金项目(52004165);2023年度沈阳市科技技术计划项目(23-407-3-27);辽宁省教育厅高等学校基本科研项目(面上项目)(JYMS20230180)。

摘　　要：使用不同金属锰源(醋酸锰,硫酸锰,氯化锰)为原料,合成具有尖晶石结构的锂离子电池正极材料锰酸锂。首先采用共沉淀法合成锰酸锂前驱体,然后采用空气中热处理手段制备锰酸锂正极材料。通过X射线衍射、扫描电镜对合成材料的结构、形貌及组成进行分析,结果表明三种锰源制备的锰酸锂正极材料均具有尖晶石结构。采用电化学方法测试合成材料组装的锂离子电池充放电性能,结果显示氯化锰、醋酸锰及硫酸锰制备的锰酸锂正极材料分别具有108.9、104.4和95.5 mAh/g的放电比容量,表明使用氯化锰作为锰源制备的锰酸锂正极材料具有最佳的电化学放电性能,在经历50次充放电循环之后,锰酸锂正极材料仍然具有97.4%的容量。Using different metal manganese sources,manganese acetate,manganese sulfate,manga-nese chloride as raw materials,lithium ion battery cathode material lithium manganate with spinel structure was synthesized.The lithium manganate precursor was synthesized by co-precipitation way,and then the lithium manganate cathode material was prepared by heat treatment in air.The structure,the morphology and composition of as-synthesized samples were characterized by X-ray diffraction and SEM.The charge and discharge performance of the lithium-ion battery was tested by electrochemical method.The lithium manganate cathode materials prepared by three manganese sources had uniform spinel structure.The cathode materials prepared by manganese chloride,man-ganese acetate and manganese sulfate had the electrochemical properties of 108.9,104.4 and 95.5 mAh/g.The lithium manganate cathode material prepared using manganese chloride as a manganese source had the best electrochemical discharge performance,and still had a capacity of 97.4%after 50 charge and discharge cycles.

关 键 词：锰源 锰酸锂 锂离子电池 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]