Preparation and characterization of hybrid solid-state electrolytes for high performance lithium-ion batteries

Abstract

Hybrid solid-state electrolytes are emerging as a promising solution to achieve high ionic conductivity, excellent mechanical properties and good safety for developing high-performance rechargeable batteries. In this work, a polymer (PAN)-based hybrid solid-state electrolyte is designed and synthesized. The composite membrane (PLL) is composed of polyacrylonitrile (PAN) matrix, bistrifluoromethanesulfonimide lithium salt (LiTFSI) and Li1.3Al0.3Ti1.7(PO4)3 (LATP) particles. The solid-state lithium battery including the as-synthesized composite membrane, Li metal and LiNi0.8Co0.1Mn0.1O2 exhibits an initial discharge capacity of 197 mAh g−1 at a charge/discharge current density of 0.5 C at room temperature. The battery using the PLL-20 electrolyte exhibits the highest stable cycling performance and highest reversible capability than those of the batteries with PLL-10, PLL-30 membrane electrolytes and commercial PE separator, respectively.