| 초록 |
Porous polyimide(PI) xerogel membranes with uniform pores were prepared by sol-gel process and chemical imidization followed by freeze drying. Gel precursors are prepared using various aromatic dianhydrides, aromatic diamines, and graphene oxides. After that, Inorganic filler are added to prevent volume shrinkage that may occur during freeze drying process, and freeze drying process is performed to prepare a separator through a final casting process. The membrane showed high ion conductivity and better cycling performance and also showed excellent thermal properties. Electrical, physical, thermal properties and structural forms were measured by various measuring instruments. |
