Preparation and performance of a novel core-shell Gel Polymer Electrolytes
A novel core-shell latex Gel Polymer Electrolytes (GPE) based on poly (methyl methacrylate-acrylonitrile -styrene) (P(MMA-AN-ST)) was prepared for applications in Li-ion batteries. The structure and the performance of the polymer and the GPE were characterized with FTIR, DSC/TG, TEM, SEM, LSV and CA. It is shown that the copolymer has a high thermal stability up to 320°C and the porous structure of the membrane was formed effectively. As-prepared gel polymer electrolytes exhibits a high ionic conductivity of 3.52×10−3 Scm−1 at 25°C and it is electrochemically stable up to 5.2V (vs. Li). This novel GPE can be potentially applied to the manufacture of PLBs.
Novel porous polymer electrolyte based on polyacrylonitrile
Abstract High porous poly(hydroxyethyl acrylate- co -acrylonitrile) [P(HEA-AN)] membranes were prepared by a phase inversion method. Porous polymer electrolytes are prepared by soaking the porous membranes in the electrolyte solution. The ionic conductivity of the porous polymer electrolytes was found to be as high as 3.66 × 10 −3  S cm −1 . The membrane structure changed with the different processing conditions. With increasing mole ratio of AN in the copolymer, the cross-sectional structure of the membrane changes from finger-like to honeycomb-like and ionic conductivity of porous polymer electrolytes is improved. As the polymer concentration increases, the pore diameter of porous membrane decreases and ionic conductivity of porous polymer electrolyte is improved obviously.
Structure, porosity and conductivity of PVdF films for polymer electrolytes
Abstract Semicrystalline porous films of poly(vinylidenefluoride) (PVdF) were prepared by a phase-inversion method. The microstructure of the films depends on the preparation conditions, and can be classified in two categories: sponge-like and finger-like. Porosities higher than 75% can be reached with finger-like texture, and all the pore structure is accessible to the electrolyte solution. Conductivity higher than 2 mS/cm is easily obtained by soaking the films into standard electrolyte solutions.