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
崔勇 1唐啸虎 1邵忠财 1邵鸿媚 1张伟 1李学田 1董华2
作者信息
- 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
- 折叠
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.
Abstract
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Key words
manganese source/LiMn2O4/Li-ion batteries/electrochemical performance引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
维普
万方数据