Yang Qianyi, Lu Fuqiang, Liu Yulin, Zhang Yijie, Wang Xiujuan, Pang Yuepeng, Zheng Shiyou
School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
Nanomaterials (Basel). 2021 Apr 8;11(4):946. doi: 10.3390/nano11040946.
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.
具有高锂离子传导率和电化学稳定性的固体电解质对于开发高性能全固态电池非常重要。在这项工作中，采用熔融渗透法将Li(BH)(NH)纳米限域在介孔二氧化硅分子筛（SBA-15）中。这种电解质表现出优异的锂离子传导性能，在55°C时锂离子传导率达到5.0×10 S cm，电化学稳定窗口为0至3.2 V，锂离子迁移数为0.97。此外，这种电解质能够使Li|Li(BH)(NH)@SBA-15|TiS电池稳定循环，在55次循环后表现出150 mAh g的可逆比容量，库仑效率为96%。
