【作者】 艾变开；

【导师】 魏杰；

【作者基本信息】 北京化工大学 ， 应用化学， 2002， 硕士

【摘要】 随着世界范围内人们对环保的呼声日益高涨，电池技术也正进入“绿色环保型”的时代。而作为九十年代后兴起的锂聚合物二次电池，由于其具有清洁无污染、高电压、高比能量、长循环寿命、易加工等独特的优点有望引领时代潮流并取代铅酸、镍氢，甚至锂离子电池。 在本论文中，一方面，将基体预聚物聚乙二醇丙烯酸双酯(PEGDA)的合成方法由硫酸催化改为固体酸催化，并对两种类型催化下的反应条件(如溶剂种类、醇酸比例、温度、反应时间等)，以及最终制得的固体电解质膜的导电性能和机械性能进行了比较；另一方面，以固体酸催化合成的PEGDA为主要原料，从基体和添加材料两方面进行了电解质性能的改性研究。 首先，分别研究PEGDA的分子量及网络交联密度，PEGDA与聚氨酯丙烯酸酯共聚，以及阳离子与自由基混杂光固化体系对SPE材料的离子电导率、机械性能和光固化速率的影响，结果表明：适度交联和共聚都可以在基本不损害导电性能的前提下，改善SPE材料的机械性能；混杂光固化法虽然可以一定程度上改善机械性能，但对电导率和光固化性能的负面影响太大，不适宜采用。 其次，研究了添加增塑剂和纳米材料对光固化SPE材料的固化 北京化工大学硕士学位论文性能、导电性能和机械性能的影响，结果表明:增塑可以大大提高离子电导率，尤其以复合增塑剂的效果最明显，但增塑对机械性能和光固化性能有负面影响;纳米材料的种类、粒径尺寸、表面处理方法都会影响到SPE材料的性能，实验中发现:纳米TIO:对电导率的提高最多，但不适宜用在光固化体系中，纳米A12O3可以改善SPE材料的导电性能和机械性能，且对光固化性能影响不大，所以为优选材料。 最后，在上述研究的基础上，以固体酸催化合成的PEGDA、聚醚型聚氨酷丙烯酸酷(PUA)、复合增塑剂(Pc+3 Ec)、纳米A12q为因子，其含量为水平进行正交实验，确定优选方案为PEGDA:PUA:PC+3EC:A12O3=l:0.3:0.2:0.02。更多还原

【Abstract】 With the increasing requirement for environmental protection in the world, the battery technology is coming into the era of Green Environmental Protection. As the lithium polymer secondary battery, which has been popular from 1990’s, has some good natures, such as cleanness, high voltage, high energy density, long cycle life, easy made etc., it will probably replace lead acid-type, nickel hydrogen-type, and even lithium ion-type battery.In this paper, polyethylene glycol diacrylate (PEGDA), a kind of matrix oligomer, was synthesized, using a solid acid as a catalyst in place of sulphuric acid. Other reaction conditions, such as solvent type, alchol acid ratio, temperature, reaction time, and ion-conductivity and mechanical performance of final made electrolyte was compared when using two different solid acids. On the other hand, the modification of electrolytes was carried out with PEGDA as a crucial materials.Firstly, the effects of crossing density, copolymerization of polyurethane acrylate with PEGDA, hybrid UV curing of PEGDA with cationic UV-curable monomer on conductivity, mechanical performanceand UV curing velocity of solid polymer electrolytes (SPE) materials were discussed. It was found that the suitable crossing density and types of copolymers would be beneficial to improving the mechanical performance of the matrix, and increasing the conductivity without decreasing the UV curing velocity, and that hybrid UV curing had some disadvantages to the conductivity and UV curing, and was unsuitable to be used, although it could improve the mechanical performance thereof in some degree.Next, the effects of plasticizers and nanopowders on the UV curing, conductivity and mechanical performance were mainly researched. It was concluded that plasticizers could greatly improved the conductivity, but had some adverse effects on the mechanical and UV curing performance, and that the particle type, the particle size, and the processing method of the surface of the nanopowder would influence the properties of the SPE materials. During the research, we found that TiO2 could greatly increase the conductivity, but it was unsuitable to be used in the UV curing system, and A12O3 with a particle size of 27nm could improve the conductivity and the mechanical performance of SPE materials without obvious side-effects on UV curing, and it was preferable.Finally, base on the above research, ortho test with PEGDA which was synthesized by solid acid, polyurethane acrylate (PUA), PC+3EC, A12O3 as factors, and the contents of them as the level, were carried out,and obtained the preferable embodiment which was PEGDArPUA: PC+3EC:A12O3= 1:0.3:0.2:0.02.更多还原