Effect of POSS-PEG hybrid nanoparticles on cycling performance of polyether-LiDFOB based solid polymer electrolytes for all solid-state Li-ion battery applications

다국어 초록 (Multilingual Abstract)

For the first time, the consequences of organic-inorganic hybrid nanoparticle polyhedral oligomericsilsesquioxane-polyethylene glycol (POSS-PEG(n = 4)) on the physicochemical and electrochemicalproperties of poly(ethylene oxide) (PEO)-lithium difluoro(oxalato)borate (LiDFOB) based nanocompositesolid polymer electrolyte (NSPE) membranes were systematically prepared and utilized as an activeseparator for battery applications. The thermal stability and structural properties of the prepared NSPEmembranes were analyzed by means of differential scanning calorimetry (DSC), thermogravimetry (TG)and X-ray diffraction (XRD) analyses. The morphological changes by POSS-PEG in polymer electrolytemembranes were investigated by field emission scanning electron microscopy (FE-SEM) andtransmission electron microscopy (TEM). The incorporation of POSS-PEG greatly enhanced the ionicconductivity, mechanical integrity and compatibility. The maximum ambient temperature ionicconductivity was found to be in the range of 7.28 10 5 S/cm for 40 wt% POSS-PEG. Finally, the solidstate lithiumcell was assembled as Li/NSPE/LiCoO2. The cell delivered a maximum discharge capacity of187 mAh g 1 at 0.1C-rate with very good capacity retention up to 50 cycles. The test results indicatedthat the electrolyte is found to be a better candidate than those reported earlier.

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