NATRIY-OLTINGUGURTLI BATAREYALAR “SHUTTLE” EFFEKTINI KAMAYTIRUVCHI SOPOLIMERLI GELSIMON ELEKTROLIT SINTEZI

A gel polymer electrolyte based on plasticized acrylonitrile (AN)-methyl acrylate (MA) copolymers is proposed as a promising solution for efficient sodium-sulfur batteries (Na-SB). In this work, polymer electrolytes with an internal resistance of up to 1 Ohm were developed by optimizing the AN-MA copolymer composition and the amount of liquid electrolyte. These electrolytes significantly reduced the sulfur migration to the surface of sodium electrodes due to the “shuttle” effect, increasing electrochemical stability. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were used to image the surface and perform elemental analysis of the copolymer and gel electrolyte. It was shown that the surface flattening (amorphization) occurred with an increase in the liquid electrolyte content of the gel electrolyte. It was found that the presence of excess or deficiency of liquid electrolyte in the gel electrolyte caused an increase in the “shuttle” effect.