Lithium ion conductive Li1.5Al0.5Ge1.5(PO4)3 based inorganic-organic composite separator with enhanced thermal stability and excellent electrochemical performances in 5Â V lithium ion batteries

The lithium ionic conducting glass ceramic Li1.5Al0.5Ge1.5(PO4)3-polypropylene (PP) based inorganic-organic composite separator (LAGP-PP) is prepared. The LAGP-PP separator owns enhanced thermal stability, wettability and higher ion conductivity than the traditional Al2O3 coated PP separator. The superior C-rate capacity and cyclability in 5 V lithium ion batteries indicate that the LAGP-PP separator is a good alternative for the traditional inert inorganic ceramic coated polyolefin separators and is a kind of promising candidate separator for the high voltage lithium ion batteries.235