Preparation and Characterization of Hybrid Solid-State Electrolytes in High Performance Lithium-Ion Batteries

Abstract

Hybrid solid-state electrolytes are emerging as a promising solution to achieving high ionic conductivity, excellent mechanical properties, and good safety for developing high-performance rechargeable batteries. In this work, we prepared a polymer (PAN)-based hybrid solid-state electrolyte. 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 with this composite membrane, Li metal anode and LiNi0.8Co0.1Mn0.1O2 cathode exhibits an initial reversible 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 more stable cycling performance and higher reversible capability than those of the battery with PLL-10, 30 membrane electrolytes and commercial PE separator.

Keywords: Flexible membrane, Composite solid polymer electrolytes, Stability, Electrochemical performance, Lithium-ion batteries