论文总字数：17438字

摘 要

层状结构的LiNi_1/3Co_1/3Mn_1/3O₂正极材料具有高工作电压、能量密度大、成本价格低廉、充电循环稳定性能优良以及安全性高等许多优点。其中因为Ni、Co、Mn的同时存在，所以具有明显的三元协同作用。Ni也可以有助于提高该三元正极材料的嵌锂容量；Co则明显能稳定层状结构，抑制阳离子混排；Mn的效果则降低了成本，并可以有效的改善该正极材料的安全性能。LiNi_1/3Co_1/3Mn_1/3O₂正极材料被认为是最有可能替代当代商业化LiCoO₂材料成为未来电池材料的主流。

文章中我们回顾了锂离子电池的发展史，介绍了常见锂离子电池正极材料的优缺点，介绍了LiNi_1/3Co_1/3Mn_1/3O₂正极材料的充放电原理、合成方法以及存在的问题与改进方法。本文对锂离子电池的情况进行了概述并对锂离子电池正极材料的发展现状及存在问题进行了详细论述,研究了使用静电纺丝法制LiNi_1/3Co_1/3Mn_1/3O₂正极材料的工艺条件。

本文中主要采用XRD分析和电化学研究手段，从合成的条件、材料的结构以及电化学性能等多方面对LiNi_1/3Co_1/3Mn_1/3O₂正极材料进行研究。

关键词：锂离子电池 正极材料 LiNi_1/3Co_1/3Mn_1/3O₂ 制备反应过程 静电纺丝

LiNi_1/3Co_1/3Mn_1/3O₂ cathode material

ABSTRACT

LiNi_1/3Co_1/3Mn_1/3O₂ cathode material has lots of advantages, such as higher work voltage, higher energy density, lower cost, excellent cycle stability, satisfactory security and so on. The ternary coprecipitation synergy has a obvious effect on materials when the Ni、Co、Mn exist together. Ni is good to improve the anode material of lithium embedded capacity, Co has a contribution to stay the lamellar structure, which can prevent cation mixing. The presence of Mn not only can reduce the whole costs but can successfully improve the safety performance of the cathode material. So LiNi_1/3Co_1/3Mn_1/3O₂ is considered at the most likely alternative to replace common LiCoO₂ to be the mainstream of the future battery material. In this paper, we remind of the history of the development of lithium-ion batteries and the outlined advantages and disadvantages of common cathode materials for lithium ion batteries. In addition , the charging and discharging mechanism of LiNi_1/3Co_1/3Mn_1/3O₂ cathode materials, the synthetic methods, problems and improved ways were introduced.In this essay , I will give an over view of lithium -ion batteries and get a review of lithim-ion batteries cathode materials development situation and problems in detail. The synthesis conditions, the structure of materials , the tap density and chemical performance of LiNi_1/3Co_1/3Mn_1/3O₂ cathode material were studied mainly by XRD analysis and electrochemical tests.

Keywords: Lithium ion battery; Cathode material；LiNi_1/3Co_1/3Mn_1/3O₂; Preparation reaction process; Oxidation process; High temperature solid state method; Electrospinning.

目录

摘 要

ABSTRACT

第一章 绪论

1.1 引言

1.2 锂离子电池简介

1.2.1发展史

1.2.2锂离子电池的分类

1.2.3锂离子电池的结构与特点

1.3正极材料

1.3.1概要

1.3.2 三元正极材料

1.3.3正极材料的选择要求

1.4静电纺丝简介

1.5本论文的选题背景和研究内容

第二章 实验

2.1实验原料

2.2实验器材

2.3实验步骤

2.3.1配制正极溶液

2.3.2静电纺丝

2.3.3电池制作

2.3.4电池装配

第三章 测试与分析

3.1循环伏安测试

3.2 恒流充放电测试与分析

3.3 晶体结构分析

3.4 正极材料的电导率

第四章 结论与展望

4.1结论

4.2 展望

参考文献

致谢

第一章 绪论

1.1 引言

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