Battery-grade liquid electrolyte consisting of 1.0 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in a 1:1 volumetric mixture of 1,3-dioxolane (DOL) and 1,2-dimethoxyethane (DME), with 2.0% lithium nitrate (LiNO3) additive. Widely used in lithium-sulfur batteries to enable efficient lithium-ion conduction, enhance electrochemical stability, and mitigate the polysulfide shuttle effect for improved cycle life and capacity retention. Applicable in research for next-generation rechargeable batteries in electric vehicles, portable electronics, and energy storage systems. Offers better compatibility with sulfur cathodes compared to standard carbonate-based electrolytes.