Synthesis, Structure and Application of Fluorine-Graphite Intercalation Compound

Abstract

The synthesis, electrical conductivity and stability of fluorine-intercalated carbon fibers have been summarized. Stage 1 to 4 compounds, C₃F-C₁₆F, are synthesized according tothe crystallinity of host carbon fibers and reaction conditions. With increasing crystallinity of carbon fiber, and with increasing acidity of a coexisting solid fluoride and amount of coexisting HF, fluorine intercalation is facilitated. The highest electrical conductivities were (8-9) ×10³, 2.4×10⁴ and 1.1×10⁵ Scm^-1 for fluorine-intercalated PAN fiber, pitch fiber and vapor grown carbon fiber (VGCF), respectively. The stability was in the order of the compounds of PAN fiber, pitch fiber and VGCF.