介孔材料SBA-15改性的复合凝胶聚合物电解质的制备及性能  

Preparation and Characteristics of Composite Gel Polymer Electrolyte Modified by Mesoporous Silica SBA-15

作　　者：李秀琴[1] 王先友[1] 李娜[1] 曹俊琪[1] 胡涛[1] 

机构地区：[1]湘潭大学化学学院,湖南湘潭411105

出　　处：《功能高分子学报》2008年第3期327-331,共5页Journal of Functional Polymers

基　　金：国家自然科学基金(50475080;20673092)

摘　　要：以聚(甲基丙烯酸甲酯-聚乙二醇二甲基丙烯酸酯)(P(MMA-PEGDMA))共聚物为基体,介孔硅分子筛SBA-15为无机填料制备了复合凝胶聚合物电解质。采用原子力显微镜(AFM)、热重分析(TG)和交流阻抗(AC)等技术对其形貌、热稳定性及电化学性能进行了研究。结果表明:无机填料SBA-15与聚合物基体有较好的相容性;SBA-15的加入改善了聚合物电解质的热稳定性,提高了离子电导率,当w(SBA-15)=0.03时,离子电导率达最大值3.68×10-3S/cm;并且掺杂SBA-15后,聚合物电解质的电化学稳定性得到了提高,其电化学稳定窗口为4.9V(vsLi+/Li),可满足高性能锂离子电池的要求。A novel composite gel polymer electrolyte using mesoporous silica SBA-15 as the filler was developed. The structure, morphology and conductivity of composite gel polymer electrolyte were studied by atom force microscopy （AFM）, thermogravimetric analyzer （TG） and alternating current （AC） impedance spectroscopy. The experiment results show that SBA-15 can increase the thermal stability and enhance the ionic conductivity. The excellent ionic conductivity and broad electrochemical stability window （4.9 V） suggest that the composite polymer electrolyte can be used as candidate electrolyte material for lithium-ionic battery.

关 键 词：聚合物电解质 SBA-15 离子电导率 电化学窗口 交流阻抗 

分 类 号：O631[理学—高分子化学]