Highly Li‐ion conductive Li₄(BH₄)₃I@SBA‐15 is synthesized by confining the LiI doped LiBH₄ into mesoporous silica SBA‐15. Uniform nanoconfinement of P6₃ mc phase Li₄(BH₄)₃I in SBA‐15 mesopores leads to a significantly enhanced conductivity of 2.5 × 10⁻⁴ S cm⁻¹ with a Li‐ion transference number of 0.97 at 35 °C. The super Li‐ion mobility in the interface layer with a thickness of 1.2 nm between Li₄(BH₄)₃I and SBA‐15 is believed to be responsible for the fast Li‐ion conduction in Li₄(BH₄)₃I@SBA‐15. Additionally, Li₄(BH₄)₃I@SBA‐15 also exhibits a wide apparent electrochemical stability window (0 to 5 V vs Li/Li⁺) and a superior Li dendrite suppression capability (critical current density 2.6 mA cm⁻² at 55 °C) due to the formation of stable interphases. More importantly, Li₄(BH₄)₃I@SBA‐15‐based Li batteries using either high‐capacity sulfur cathode or high‐voltage oxide cathode show excellent electrochemical performances, making Li₄(BH₄)₃I@SBA‐15 a very attractive electrolyte for next‐generation all‐solid‐state Li batteries.

中文翻译：

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适用于全固态锂电池的高性能Li–B–H电解质

高度锂离子传导的Li ₄（BH ₄）₃ I @ SBA-15是通过将掺杂LiI的LiBH ₄限制在介孔二氧化硅SBA-15中而合成的。在SBA-15中孔中P 6 ₃ mc相Li ₄（BH ₄）₃ I的均匀纳米约束导致电导率显着提高，为2.5×10 ^-4 S cm ^-1，在35°C时Li-离子迁移值为0.97 。Li ₄（BH ₄）₃之间的厚度为1.2 nm的界面层中的超锂离子迁移率I和SBA-15被认为是Li ₄（BH ₄）₃ I @ SBA-15中锂离子快速传导的原因。此外，Li ₄（BH ₄）₃ I @ SBA-15还具有较宽的表观电化学稳定性窗口（相对于Li / Li ⁺为0至5 V ）和优异的Li枝晶抑制能力（临界电流密度为2.6 mA cm ^-2） 55°C）由于形成稳定的中间相。更重要的是，使用高容量硫阴极或高压氧化物阴极的Li ₄（BH ₄）₃ I @ SBA-15基Li电池表现出出色的电化学性能，从而使Li ₄（BH ₄）₃ I @ SBA-15是下一代全固态锂电池的极具吸引力的电解液。