聚乙二醇二丙烯酸酯基透明凝胶电解质的制备及其性能研究

将三氟甲烷磺酸锂(LiCF3SO3)、碳酸丙烯酯(PC)、聚乙二醇二丙烯酸酯(PEGDA)以及2,2-二甲氧基-2-苯基苯乙酮(DMPAP)混匀后,采用紫外光固化法制备高分子透明凝胶电解质.其中,LiCF3SO3、PC、PEGDA和DMPAP的加入量是影响凝胶电解质电导率的四个主要因素,各因素分别设置5个水平,采用L25(54)正交设计进行试验,以凝胶电解质的电导率作为考察指标.通过极差分析,得出影响电导率的因素顺序为LiCF3SO3PCPEGDADMPAP,制备试验中LiCF3SO3、PC和PEGDA的最佳质量比为0.3∶3∶1.采用紫外-可见光谱仪、XRD、四探针电导率测定仪分别对凝胶电解质的光透过率、结晶程度和电导率进行了表征.结果表明,所制备的凝胶电解质具有较高的可见光透过率和电导率.通过在水中浸泡及外界自然环境下放置试验,测试表明所制得的凝胶电解质的稳定性较好.

Preparation and Performance Research of Transparent Gel Electrolyte Based on Polyethylene Glycol Diacrylate

After lithium trifluoromethane sulfonate （ LiCF3 SO3 ） ,propylene carbonate （ PC ） , polyethylene glycol diacrylate （PEGDA ） and 2 ,2-dimethoxy-2-phenylacetophenone （DMPAP） were uniformly mixed ,polymer gel electrolyte was prepared by UV curing of the photopolymerizable electrolyte mixture .Based on L25 （54 ） orthogonal test ,the four main factors influencing the conductivity of gel electrolyte ,such as the addition amount of LiCF3SO3 ,PC ,PEGDA and DMPAP ,were investigated .Each factor was tested at 5 levels .The analysis of range showed that the importance of factors effected on the conductivity were LiCF3SO3 ＆gt; PC ＆gt; PEGDA ＆gt; DMPA The optimum mass ratio of LiCF3 SO3 ,PC and PEGDA was determined as 0 .3：3：1 .P .The visible light transmittance ,crystallization degree and conductivity of gel electrolyte were studied by using UV-vis spectrophotometer ,XRD and four-point probe instrument ,respectively .The results indicated that the prepared gel electrolyte had high visible light transmittance and conductivity .By immersion in water and standing in outside natural environments ,it was found that the stability of gel electrolyte was good .