《高分子透明凝胶电解质的制备与表征》-毕业论文.doc

PAGE 本科毕业设计(论文) 题目：高分子透明凝胶电解质的制备与表征 院 （系）： 材料与化工学院 专 业： 高分子材料与工程 班 级： 090310 学 生： 学 号： 090310113 指导教师： 2013年6月 PAGE \* MERGEFORMAT V 高分子透明凝胶电解质的制备与表征 摘 要 由于高分子凝胶电解质同时具有高分子水溶液和电解质的性质，可以起到固体电解质与液体电解质的双重性能，因此在电池领域中起到隔板与电解质的双重作用，从而在锂离子电池、太阳能电池以及各类电致变色器件中被广泛的应用。 本论文主要以高氯酸锂（LiClO4）、碳酸乙烯酯（EC）、三氟甲烷磺酸锂（LiCF3SO3）、碳酸丙烯酯（PC）、聚乙二醇二丙烯酸酯（PEGDA）、以及光固化剂DMPAP通过紫外光固化，采用类“浇铸”技术从而制备凝胶凝胶电解质。用红外光谱测试凝胶电解质样品组份、紫外光谱图对凝胶电解质的光透射率进行表征、XRD对凝胶电解质的结晶程度进行表征、四探针电导仪表征凝胶电解质的导电性。 通过在不同条件下对凝胶电解质样品的电导率测试得出凝胶电解质的水稳定性、抗紫外光老化、自然环境下样品稳定性都较好，虽然在以上条件下凝胶电解质样品的电导率都有一定幅度的变化，但变化范围不是很大，并且在以上条件下凝胶电解质样品的电导率可达到1.5s/cm；其次，用凝胶电解质与苯胺制备的电致变色器件的变色性能很好，在1~1.5v电压下器件变色明显。 关键词：凝胶电解质；紫外光固化；类“浇铸”技术 ；电致变色 Preparation and characterization of polymer gel electrolyte ABSTRACT Polymer gel electrolytes possess the properties of solid and liquid electrolyte, can play a dual role of separator and electrolyte in the battery field. So it is widely used in a lithium ion battery, solar battery and various electrochromic devices. In this paper, we mainly used lithium trifluoromethane sulfonate (LITRIF), propylene carbonate (PC), polyethylene glycol diacrylate (PEGDA), and UV light curing agent DMPAP to prepare the gel electrolyte using the casting technology. The composition, light transmittance, crystallinity and conductivity of gel electrolyte samples were characterized by infrared and UV-vis spectra, XRD and four probe electric conductivity meter. Through the conductivity testing of polymer gel electrolyte in different conditions, its stability after being dropped in water or UV aging and being placed in the natural environment was studied. The results showed the conductivity of gel electrolyte changed in a narrow range, and reached 1.5 S/cm under the above conditions. The electrochromic devices prepared with gel electrolyte and polyaniline presented obvious discoloration under 1~1.5 voltage. Keywords: Gel electrolyte; ultraviolet light polymerizat