PEG-400水热辅助法富锂态三元材料的制备

摘要：锂离子电池较其他二次电池而言，具有较高的能量密度、较好的安全稳定性和对环境友好等优点，其在便携式电器、电动汽车、大规模储能以及军事电源的应用，引起了人们的高度关注和广泛研究。富锂层状氧化物材料具有高电压和高电容的优点，使他们成为锂离子电池理想的正极候选材料。然而他们也面临着低电容率的困难，严重阻碍了他们的广泛应用。在这项工作里，Li(Li0.167Mn0.5·Co0.167Ni0.167)O2微球在水热辅助方法下合成，在这种水热过程里PEG-400作为表面活性剂与锂原子混合得到镍钴锰基微球前驱体，并通过烧结得到最终产品。研究发现，所制备的富锂层状氧化物微球具有很高的放电能力和优越的表现这里所报告的准备策略可能提供有助于实现各种先进的富锂层状复合材料的提示来生产高性能储能材料。47036

毕业论文关键词：三元材料；富锂；水热辅助法；PEG-400；高容量

Abstract

Abstract：Lithium-ion battery than other secondary batteries, it has a higher energy density, better security and stability and environmental friendliness, and its portable appliances, electric vehicles, energy storage and large-scale application of military power, causing the attention of people and extensive research. Lithium rich layered oxide material having a high voltage and high capacitance of advantages, making them ideal for lithium ion battery cathode material candidate. However, they also face difficulties low permittivity, a serious impediment to their widespread application. In this work there, Li (Li0.167Mn0.5 • Co0.167Ni0.167)O2 microspheres assisted hydrothermal synthesis method, in which the hydrothermal process in PEG-400 as a surfactant obtained by mixing with a lithium atom nickel-cobalt-manganese-based microsphere precursors, and the final product obtained by sintering. The study found that lithium rich layered oxide microspheres prepared with a high discharge capacity and superior performance reported here may provide a preparation strategy tips help achieve advanced lithium-rich layered composite materials to produce high performance energy storage material.

Keywords：Ternary materials；Lithium-rich；Hydrothermal-assisted；PEG-400；High capacity

1.绪论 1

1.1 研目的及意义 1

1.2. 研究背景 1

1.2.1 锂离子电池的特点和应用 1

1.2.2 锂离子电池概述 2

1.3三元材料制备方法研究进展 4

1.3.1 固相法 4

1.3.2 共沉淀法 5

1.3.3 溶胶凝胶法 5

1.3.4水热法 5

1.4. 课题研究的内容和要求 6

1.4.1 研究的目的 6

1.4.2 研究的要求 6

2. 实验部分 7

2.1 实验药品 7

2.2仪器和设备 7

2.3 实验内容 9

2.3.1 样品制备 9

2.3.2 电化学性能检测 11

3. 实验数据测试及分析 12

3.1 样品循环伏安测试曲线 12

3.2 对比循环伏安测试曲线 19 PEG-400水热辅助法富锂态三元材料的制备:http://www.751com.cn/huaxue/lunwen_48958.html