Li(2)(BH(4))(NH(2)) Nanoconfined in SBA-15 as Solid-State Electrolyte for Lithium Batteries

Solid electrolytes with high Li-ion conductivity and electrochemical stability are very important for developing high-performance all-solid-state batteries. In this work, Li(2)(BH(4))(NH(2)) is nanoconfined in the mesoporous silica molecule sieve (SBA-15) using a melting–infiltration approach. This electrolyte exhibits excellent Li-ion conduction properties, achieving a Li-ion conductivity of 5.0 × 10(−3) S cm(−1) at 55 °C, an electrochemical stability window of 0 to 3.2 V and a Li-ion transference number of 0.97. In addition, this electrolyte can enable the stable cycling of Li|Li(2)(BH(4))(NH(2))@SBA-15|TiS(2) cells, which exhibit a reversible specific capacity of 150 mAh g(−1) with a Coulombic efficiency of 96% after 55 cycles.