Thermal decomposition and gas release properties of metal chloride-graphite intercalation compounds prepared utilizing polyimide film-derived graphite sheets

摘要

We have reported that metal chloride-graphite intercalation compounds (GICs) prepared from flexible polyimide film-derived graphite sheets, such as CuCl2-, MoCl5-, and AlCl3-CuCl2 -GICs, demonstrate excellent air stability. In this work, the high-temperature thermal stability and gas release properties of those GICs were investigated. MoCl5- and AlCl3-CuCl2-GICs were unstable at high temperatures, exhibiting weight losses at 150 degrees C and 100 degrees C, respectively, which accompanied the release of HCl and Cl-2 gases. In contrast, the CuCl2-GIC demonstrated relatively high thermal stability in inert atmospheres at temperatures below 400 degrees C, showing neither weight loss nor gas release. After heat treatment at 600 degrees C at a heating rate of 5 degrees C/min, only a slight decrease in the electrical conductivity was observed.