富锰三元正极材料的锂离子电池.doc

锂离子电池用高容量型富锰三元正极材料的制备与表征 PAGE 锂离子电池用高容量型富锰三元正极材料的制备与表征 摘要 正极材料是制备锂离子电池的重要组成部分，传统正极材料存在高成本、资源紧缺、污染环境等问题，已不能成为制备新一代锂离子电池正极材料的首选。高容量型富锰三元正极材料由于具备容量高、热稳定性好，充放电压宽、成本低，污染少等优良特性，得到了广泛的关注。 本文采用了快速共沉淀法制备了纳米级xMn(OH)2·(1-x)Ni0.8Co0.1Mn0.1(OH)2前驱体、采用高温固相法合成了xLi2MnO3·(1-x) LiNi0.8Co0.1Mn0.1O2三元正极材料。主要介绍了对合成材料所需要的温度、掺锂量、x值的三组对比试验，通过对三组实验结果的XRD分析、SEM图像分析、初次充放电性能测试以及放电循环测试的对比，得到了一组相对较优的实验条件，即温度为900℃、掺锂量为5%、x=0.5时所得到的三元正极材料最好，合成的锂离子电池的性能最优越。 关键词：锂离子电池；富锰三元正极材料；xLi2MnO3·(1-x) LiNi0.8Co0.1Mn0.1O2 PREPARATION AND CHARACTERIZATION OF LITHIUM-ION BATTERY WITH HIGH CAPACITY MANGANESE-RICH TERNARY CATHODE MATERIALS ABSTRACT The cathode material is an important part f the preparation of lithium-ion battery ,the traditional cathode material has a higher cost ,resource shortages and environmental pollution and other serious shortcomings have not become a preferred preparation of a new generation of lithium-ion battery cathode materials. Since the rich managanese ternary, high-capacity cathode materials proposed, by virtue of its high capacity, good thermal stability, charge and discharge voltage wide, low cost, less pollution and other excellent features a lot of attention. In this paper, a fast was prepared by coprecipitation of the nanoscale xMn (OH)2·（1-x）(Ni0.8Co0.1Mn0.1) (OH)2precursor, the high temperature solid phase synthesis method to the ternary positive materials of the xLi2MnO3·(1-x) LiNi0.8Co0.1Mn0.1O2 . This paper main introduce three sets of comparative test of the temperature doped lithium content x value to synthetic materials. Through three sets of experimental results of XRD analysis, SEM image analysis, the initial charge and discharge performance test and discharge cycle test compared, I obtain a set of relative optimum experimental conditions, that is, the temperature of 900℃, the doped lithium of 5%, x=0.5 Key words: lithium-ion battery; manganese-rich ternary cathode materials; xLi2MnO3·(1-x) LiNi0.8Co0.1Mn0.1O2 目 录 TOC \o 1-3 \h \z