Tailoring the electrochemical performance of the polymer electrolyte using Na2H20B4O17 for magnesium sulfur battery applications

Due to the construction's low cost, ecological appeal, friendliness, great theoretical density, and reliability, the Mg-S battery is an encouraging substitute for the pillar lithium battery. Nevertheless, self-discharge, the delayed conversion reaction pathway, and the absence of readily compatible electrolytes continue to restrict its beneficial uses. In this work, polymer electrolyte used 0.7 wt% polyvinyl alcohol (PVA), (0.3-x)_wt.%(Mg(CF₃SO₃)₂) and _xwt.%Na₂H₂₀B₄O₁₇ (x = 0,0.01,0.02,0.03,0.04,0.05) (PE_x) have been prepared and characterized for usage in Mg-S batteries. Integrating the PVA__(0.3-x)wt.% (Mg(CF₃SO₃)₂)_ _0.04Na₂H₂₀B₄O₁₇ (X₄) with tetraethylene glycol dimethyl ether (G₄) demonstrates effective Mg plating and stripping behavior, good anodic stability (versus Mg/Mg ²⁺), and a significant ionic conductivity (8.09 $\times$ 10⁻⁷ S cm⁻¹ at 323 K). The Mg-S is assembled using an X₄_G₄ electrolyte and delivers a reversible capacity of 100 mAh g⁻¹ after 30 cycles.