biostudies-literatureUnknown16(1)You JThe lithium (Li) metal anode is widely regarded as an ideal anode material for high-energy-density batteries. However, uncontrolled Li dendrite growth often leads to unfavorable interfaces and low Coulombic efficiency (CE), limiting its broader application. Herein, an ether-based electrolyte (termed FGN-182) is formulated, exhibiting ultra-stable Li metal anodes through the incorporation of LiFSI and LiNO₃ as dual salts. The synergistic effect of the dual salts facilitates the formation of a highly robust SEI film with fast Li⁺ transport kinetics. Notably, Li||Cu half cells exhibit an average CE reaching up to 99.56%. In particular, pouch cells equipped with high-loading lithium cobalt oxide (LCO, 3 mAh cm^-2) cathodes, ultrathin Li chips (25 μm), and lean eNano-micro letters257https://www.ebi.ac.uk/biostudies/studies/S-EPMC11286617biostudies-literatureBoosting High-Voltage Practical Lithium Metal Batteries with Tailored Additives.PMC11286617Li JTYou JZheng XLi JWang QWei RHu YDeng LNiu LZhou YWang JfalseBoosting High-Voltage Practical Lithium Metal Batteries with Tailored Additives.The lithium (Li) metal anode is widely regarded as an ideal anode material for high-energy-density batteries. However, uncontrolled Li dendrite growth often leads to unfavorable interfaces and low Coulombic efficiency (CE), limiting its broader application. Herein, an ether-based electrolyte (termed FGN-182) is formulated, exhibiting ultra-stable Li metal anodes through the incorporation of LiFSI and LiNO₃ as dual salts. The synergistic effect of the dual salts facilitates the formation of a highly robust SEI film with fast Li⁺ transport kinetics. Notably, Li||Cu half cells exhibit an average CE reaching up to 99.56%. In particular, pouch cells equipped with high-loading lithium cobalt oxide (LCO, 3 mAh cm^-2) cathodes, ultrathin Li chips (25 μm), and lean e2024-01-01T00:00:00Z2024 Jul2025-04-04T02:43:37.26Z2025-04-04T02:43:37.26ZS-EPMC112866173907345710.1007/s40820-024-01479-1