Abstract
Two types of graphite fluorides (C 2F) n and (CF) n were prepared by refluorination of thermally decomposed ionic graphite intercalation compounds of fluorine. Discharge behavior and effect of the heat treatment of graphite fluoride were investigated. This method drastically decreased the reaction time compared with the direct fluorination of graphite. OCV of (C 2F) n was higher by 0.3 V than that of the conventionally prepared one, however, overpotential was the same at the constant current density of 0.5 mA cm −2. On the other hand, the same OCV and less overpotential by 0.3 V were observed for (CF) n . The heat treatment of these samples in fluorine atmosphere at higher temperatures increased the discharge capacity and provided a more flat discharge potential.
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