Effect of Organic-Inorganic Hybrid Nanoparticles (POSS-PEG(n=4)) on Thermal, Mechanical, and Electrical Properties of PEO-Based Solid Polymer Electrolytes

摘要

Adding organic-inorganic hybrid nanoparticles is a potential way to enhance room temperature ionic conductivity and mechanical strength of solid polymer electrolytes (SPEs). In this work, a new nanocomposite solid polymer electrolyte (NSPE) based on poly(ethyleneoxide)-lithium bis(trifluoromethane sulfonyl) imide (PEO12-LiTFSI) incorporating polyhedral oligomeric silsesquioxane-poly(ethylene glycol) (POSS-PEG(n = 4)) hybrid nanoparticles has been prepared and reported the effect of POSS-PEG(n = 4) hybrid nanoparticles on thermal, mechanical, and electrical properties of (PEO12-LiTFSI) SPE.Results from X-ray diffraction and differential scanning calorimetry studies indicated that the conductivity increase was due to the decrease in crystallinity upon the addition of lithium salt and POSS-PEG hybrid nanoparticles into the SPE system. The mechanical properties of PEO12-LiTFSI SPE tended to increase with the addition of POSS-PEG(n = 4) nanoparticles up to 10 wt% and decreased afterwards. The NSPEs having solid state show quite high ionic conductivity (1.45 x 10(-4) S/cm at 30 degrees C), which is about 7.44 times of magnitude larger than that of the matrix polymer (PEO12-LiTFSI) electrolyte (1.95 x 10(-5) S/cm at 30 degrees C). (C) 2015 Wiley Periodicals, Inc.