摘要：伴随着锂离子电池的呈现与高速成长，锂离子二次电池与人类的各项成长息息相关。锂离子电池的发现直到今天，人类一直在研究怎样加强改善现有电池的水平，更新现有的电池材料。正极材料作为锂离子电池的主要组成部分，它是决定电池性能优劣的主要因素。三元正极材料是直到现在最具备发展前景的、最有希望成为锂离子动力电池的创造材料。本文中研究了LiNi0.8Co0.1Mn0.1O2材料的制备过程当中元素的掺杂对材料各项机能的影响，并优化出最好的反应工艺所需要的条件。

研究了Ti掺杂量对三元正极材料进行不同比例的掺杂，Ti含量分别为0.45，0.5，0.55，0.6，0.7，0.8。将这几种不同的Ti掺杂量进行各项测试比较分析结果，综合分析后Ti的不同掺杂量对三元正极材料有不同影响。

关键字：Li(Ni0.8Co0.1Mn0.1)O2；掺杂改性；电化学性质；

Abstract:With the emergence and rapid development of lithium-ion batteries,lithium-ion secondary batteries are closely related to the development of mankind.From the discovery of lithium-ion batteries,humans have been studying how to improve the level of existing batteries and innovate the existing battery materials.The cathode material is an important part of the lithium-ion battery,which is an important factor in determining the battery performance. The ternary cathode material is the most promising material for lithium ion battery production up to now. In this paper, the effect of element doping on the properties of the material during the preparation of LiNi0.8Co0.1Mn0.1O2 material was studied, and the optimum reaction conditions were optimized.

The doping amount of Ti was used to dope different proportions of ternary positive electrode materials.The Ti content was 0.45,0.5,0.55,0.6,0.7,and 0.8, respectively.These different kinds of Ti doping amount were compared and analyzed by the results of various tests. After comprehensive analysis, different doping amounts of Ti had different effects on the ternary positive electrode materials.

KeyWords：Li(Ni0.8Co0.1Mn0.1) O2；Doping modification；Electrochemical properties；

1绪论 1

1.1引言 1

1.2锂离子电池正极材料的研究现状 1

1.3锂电池正极材料的优缺点 1

1.3.1锂电池正极材料的优点 1

1.3.2锂电池正极材料的缺点 2

1.4锂离子电池的结构 2

1.5锂离子电池的正极材料的介绍 3

1.5.1 LiCoO2 3

1.5.2 LiNiO2 4

1.5.3其他正极材料 4

1.6锂离子电池的工作原理 5

1.7三元材料的制备方法 6

1.7.1 高温固相法 6

1.7.2 化学共沉淀法 6

1.7.3 溶胶凝胶法 7

1.7.4 喷雾干燥法 7

1.8研究课题的内容及意义 7

2实验方法 8

2.1实验原料和化学试剂 9

2.2实验仪器与设备