A novel process to prepare porous membranes comprising SnO2 nanoparticles and P(MMA-AN) as polymer electrolyte

摘要

We have successfully developed a new process to prepare porous poly(methyl methacrylate-co-acrylonitrile) (P(MMA-AN)) copolymer based gel electrolyte. The porous structure in the polymer matrix is achieved by adding Sn02 nanoparticles which are mostly used as gas sensor materials. The quasi-aromatic solvent, NMR has an electron-repulsion effect with the space charge layer on the surface of SnO2 nanoparticles and forms a special gas-liquid phase interface. Once the cast polymer solution is stored at an elevated temperature to evaporate the solvent, gas-liquid phase separation happens and spherical pores are obtained. The ionic conductivity at room temperature of the prepared gel polymer 10(-3) S cm(-1) electrolyte based on the porous membrane is as high as 1.54 x with the electrochemical stability up to 5.10 V (vs. Li/Li+). This method presents another promising way to prepare porous polymer electrolyte for practical use. (c) 2008 Elsevier B.V. All rights reserved.