Mesoporous silicas tethered with anions as quasi-solid electrolytes for lithium–metal batteries

Abstract

Mesoporous silicas tethered with anions were developed as quasi-solid electrolytes for Li–metal batteries. The high grafted density of trifluoromethylsulfonyl (–NTf⁻) groups and their uniformly distributed negative charge endow MCM41-NLiTf with a room temperature single Li-ion conductivity of up to 2.4 × 10⁻⁴ S cm⁻¹, which enables stable cycling of LFP‖Li batteries.