Li2(BH4)(NH2) Nanoconfined in SBA-15 as Solid-State Electrolyte for Lithium Batteries

Qianyi Yang; Fuqiang Lu; Yulin Liu; Yijie Zhang; Xiujuan Wang; Yuepeng Pang; Shiyou Zheng

doi:10.3390/nano11040946

Li₂(BH₄)(NH₂) Nanoconfined in SBA-15 as Solid-State Electrolyte for Lithium Batteries

Nanomaterials (Basel). 2021 Apr 8;11(4):946. doi: 10.3390/nano11040946.

Authors

Qianyi Yang¹, Fuqiang Lu¹, Yulin Liu¹, Yijie Zhang¹, Xiujuan Wang¹, Yuepeng Pang¹, Shiyou Zheng¹

Affiliation

¹ School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Abstract

Solid electrolytes with high Li-ion conductivity and electrochemical stability are very important for developing high-performance all-solid-state batteries. In this work, Li₂(BH₄)(NH₂) 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|Li₂(BH₄)(NH₂)@SBA-15|TiS₂ cells, which exhibit a reversible specific capacity of 150 mAh g^-1 with a Coulombic efficiency of 96% after 55 cycles.

Keywords: all-solid-state batteries; lithium amides; lithium borohydrides; nanoconfinement; solid electrolytes.

Abstract

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