Performance enhancement of PEO: LiDFOB based nanocomposite solid polymer electrolytes via incorporation of POSS-PEG13.3 hybrid nanoparticles for solid-state Li-ion batteriesстатья
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Аннотация:The addition of organic-inorganic hybrid nanoparticles presents a promising avenue for enhancing both the ionicconductivity at room temperature and the mechanical resilience of solid polymer electrolytes (SPEs). In thisstudy, a novel nanocomposite solid polymer electrolytes (NSPEs) based on poly(ethylene oxide)-lithium difluoro(oxalato)borate (PEO20-LiDFOB) incorporating polyhedral oligomeric silsesquioxane–poly(ethylene glycol)(POSS–PEG13.3) hybrid nanoparticles were developed. And also reported the effect of POSS-PEG13.3 hybridnanoparticles on the structural, thermal, electrical, mechanical, and electrochemical properties of the (PEO20-LiDFOB) SPE. X-ray diffraction (XRD), differential scanning calorimetry analysis (DSC) and polarized opticalmicroscopy (POM) revealed that the POSS-PEG13.3 hybrid nanoparticles greatly reduced the crystallinity. TheNSPE with 40 wt% of POSS-PEG13.3 exhibit markedly improved thermal stability and Young’s modulus comparedto electrolytes without the POSS-PEG13.3 component. The NSPE with 40 wt% of POSS-PEG13.3 exhibits themaximum ionic conductivity of 1.41 ×10− 5 S/cm at 30 ◦C. The electrochemical stability of the optimum conductingcomposition is 3.8 V. The cell provided a maximum discharge capacity of 158 mAh g− 1 at 0.1C-rate withextremely good capacity retention up to 50 cycles. According to the test results, the electrolyte was determined tobe a better contender than conventional organic liquid electrolytes for lithium-ion batteries.
