摘要
DMF(二甲基甲酰胺)分子被引入蒙脱石层间,此种DMF-蒙脱石具有复杂的层间结构。对DMF-蒙脱石的去水、复水和稳定条件下的典型状态,进行了XRD、IR和DTA分析,讨论各种状态的层间结构。通过比较DMF-蒙脱石和相应状态的无机蒙脱石的离子电导率,论证了DMF分子对离子迁移的重要作用,去水和稳定状态的DMF-蒙脱石被用做Mg/MnO_2电池的固体电解质,具有良好的电池性能。
Montmorillonite (Mont.) is a layer structure natural mineral which has been studied rather widely in the solid state ionics field as a fast ionic conductor in recent years. As a rule the interlayer region of montmiorillonite is consisted of a quantity of water so that it is unsuitable for solid electrolyte used in high energy density battery such as lithium cell. For this reason that Mont. must be denatured by organic compound such as N—N—Dimethyl Formamid (DMF), propylene Carbonate (PC) etc. which substitute for the interlayer water of mont. to get organic mont. and it is possible that the organic mont. as solid electrolyte is applied into solid high ener- gy lithium and magnesium battery systems. In this paper we studied the structure and ionic conductivity of DMF—mont. and got some interesting results. Complicated interlayer structure was formed by DMF into mont..Several typical interlater structures of DMF—mont. were obtained and analysed by XRD, DTA and TR. Their structures were discussed. It is indicated that interlayer DMF molecules of DMF —mont. play an impor- tant role in conduction of ions by studying the electrical performance of samples. Application of DMF—mont. in solid state battery can overcome the degeneratoin of cell anode by water and good cell performance was obtained.
基金
国家自然科学基金资助项目总编号5860340
