Preparation of Porous Carbon with Defluorination of PTFE by Radical Anion

Abstract

Polytetrafluoroethylene (PTFE) was defluorinated (carbonized) with lithium-naphthalene complex (radical anion) dissolved in dimethoxyethane. The defluorinated-PTFE exposed in air was found to be composed of fine LiF p articles and amorphous carbon matrix after heating at 70°C-700°C. Porous carbons with high BET specific surface area (1000-1800m²/g^-1) were obtained by removal of LiF from these defluorinated PTFE using dilute HCI solution. The results of X-ray diffraction and N₂ adsorption measurement suggested that the formation of mesopores in the porous carbons obtained was owing to the presence of LiF fine particle in the matrix carbon.