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摘要:LiFePO4是一种成功的锂离子电池用的正极材料，它具有价格低廉，热稳定性好，对环境无污染的特点，使其成为最具有潜力的正极材料之一。LiFePO4在各领域的使用逐渐广泛，对LiFePO4的性能探究就有了极大的学术意义及经济价值。所以，本文探究了LiFePO4正极材料在高温条件下的性能特点。35683
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本次实验采用了水热法制备了不同乙二醇加入量（40，50和60mL）的三个LiFePO4正极材料，并通过测定在25℃和40℃的电化学曲线，探讨不同温度对LiFePO4的电化学性能的影响。
通过实验可以得出，制备样品时，使用的乙二醇的量越多，通过常温及高温的LiFePO4的电化学曲线可以得出，LiFePO4正极材料的电化学性能越好。实验结果表明LiFePO4在常温（25℃）下具有优良的电化学性能。
毕业论文关键词:锂离子电池；正极材料；磷酸铁锂；水热合成法；高温环境。
The Influence of test temperature
Abstract: LiFePO4 is a success of cathode materials for lithium ion batteries, it has a low price, good thermal stability, characteristics of no pollution to the environment, making it one of the most potential cathode material. LiFePO4 gradually widely used in various fields, exploring the performance of LiFePO4 will have a great deal of academic and economic value. Therefore, this paper explores LiFePO4 cathode material performance characteristics under high temperature conditions.
This experiment was prepared by hydrothermal method of different glycol content(40,50 and 60mL) three LiFePO4 cathode material, measured at 25and 40 ℃ electrochemical curved, explore the effect of differenttemperature on the electrochemical performance of LiFePO4.
Experiments can be concluded that preparation of sample, the greater the amount of use of ethylene glycol, through the normal temperature and high temperature of LiFePO4 electrochemical curve can be concluded that the electrochemical performance of LiFePO4 battery anode materials, the better. The experimental results show that LiFePO4 under normal temperature (25 ℃) with excellent electrochemical performance.
Key words: Lithium-ion battery, Cathode material, Lithium, iron phosphate, Hydrothermal, synthesis method, High temperature environment
目录
测试温度的影响 I
1 文献综述 1
1.1 关于锂离子电池现状 1
1.2 LiFePO4 的结构及性能特点 1
1.3 磷酸铁锂电池的原理和特点 2
1.3.1 磷酸铁锂电池结构及工作原理 2
1.3.2 磷酸铁锂电池的性能特点 3
1.4 合成方法和改进措施 4
1.4.1 水热合成法 4
1.4.2 控制LiFePO4的结晶度、晶粒大小改善性能 4
1.5 有关用LiFePO4作为正极材料组装电池的性能研究 5
1.6 本课题研究的背景、目的和意义 5
2 实验仪器和设备 8
2.1 实验设备 8
2.2 实验试剂 13
3 实验内容 14
3.1 制备步骤 14
3.1.1 水热反应法制备 14
3.1.2 煅烧烧制 14
3.1.3 调浆 14
3.2 测试方法 15
3.2.1 配置电解液 15
3.2.2 循环伏安测试 15