Delicate design of lithium-ion bridges in hybrid solid electrolyte for wide-temperature adaptive solid-state lithium metal batteries
Hybrid solid electrolytes have emerged as promising candidates for next-generation high-energy-density solid-state lithium metal batteries owing to the enhanced safety and processability. Nevertheless, the practical implementation remains hindered by severe interfacial Li + transport barriers at ceramic-polymer junctions, particularly under ambient low-temperature or high-power-density surroundings. Herein, the lithium-ion bridge concept has been proposed to accelerate Li + transport kinetics across the ceramic-polymer interphase through the delicate design of a chemical bonding strategy. As demonstrated, the poly(vinylidene fluoride-co-hexafluoropropylene) (PH) chain with Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) particles can be connected by lithium benzene sulfonate as Li + conductive bridges. With these Li + bridges, this unique hybrid PH-LLZTO solid-state electrolyte exhibits an exceptional ionic conductivity of 0.71 mS cm −1 at 25°C with a superior Li + transference number of 0.67. Impressively, this advanced solid-state electrolyte empowers high-voltage LiNi 0.8 Co 0.1 Mn 0.1 O 2 /Li cells under fast charge/discharge capability as high as 4C and a wide temperature range from −20°C to 60°C. Consequently, the optimal solid-state Li metal battery could stabilize at −20°C with a high discharge specific capacity of 130 mAh g −1 . Moreover, a bipolar pouch cell by stacking 4 units can be successfully assembled using this advanced solid-state electrolyte with fast Li + transport kinetics and delivers an ultra-high voltage of 15.12 V, showcasing the great potential of integrated module application in the future.
危险品化学品经营许可证（带存储）