Polyacrylonitrile electrolytes 1.: A novel high-conductivity composite polymer electrolyte based on PAN, LiClO4 and α-Al2O3

In this work, a series of novel solid-type alpha-Al2O3-containing polyacrylonitrile (PAN)-based composite polymer electrolytes (CPE) with high conductivity and high mechanical property at room temperature has been prepared. The effect of the addition of alpha-Al2O3 on the properties of the PAN-based composite polymer electrolyte has been analyzed. The best conductivities obtained at room temperature is 5.7 x 10(-4) S cm(-1) from the CPE with 7.5 wt.% alpha-Al2O3 and 0.6 LiClO4 per PAN repeat unit. The stress-strain test result indicates that the membranes prepared possess high yield stress (73 kg cm(-2)) suitable for serving as separators in the solid-state lithium and lithium ion batteries and high yield elongation (225%) pliable to form good interface with electrodes. Also discussed are the effects of the addition of the ceramics on the interactions in the system and the possible conduction mechanism. (C) 2002 Elsevier Science B.V. All rights reserved.