Nanocomposite solid polymer electrolytes based on poly(ethylene oxide)/POSS-PEG (n = 13.3) hybrid nanoparticles for lithium ion batteries

다국어 초록 (Multilingual Abstract)

We successfully prepared the nanocomposite solid polymer electrolytes based on poly(ethylene oxide)(PEO)/polyhedral oligomeric silsesquioxane-polyethylene glycol (POSS-PEG) complexed with LiN(-SO2CF3)2 (LiTFSI) salt and studied the effect of POSS-PEG (n = 13.3) hybrid nanoparticles on structural,thermal, mechanical and ionic conductivity properties. The crystallinity of the nanocomposite solidpolymer electrolytes has been characterized by X-ray diffraction (XRD). FTIR studies showed theevidence of the complexation between PEO, LiTFSI and POSS-PEG. Differential scanning calorimetry(DSC) was used to study their glass transition and melting behaviors and to measure their respectivedegrees of crystallinity. The degree of crystallinity reduced with POSS-PEG content, indicating restrictedsegmental motion of the polymer chains. The Young’s modulus increased from 0.076 to 0.19 MPa withthe addition of POSS-PEG. Ionic conductivity studies reveal that solid polymer electrolyte with 30 wt% ofPOSS-PEG has the highest ionic conductivity of 5.05 10 5 S/cm at room temperature (23 8C). Thetemperature dependence conductivity studies showed that the samples seemed to obey the Arrheniusbehavior.

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