Li(BH)(NH) 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(BH)(NH) 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 S cm 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(BH)(NH)@SBA-15|TiS cells, which exhibit a reversible specific capacity of 150 mAh g with a Coulombic efficiency of 96% after 55 cycles.