Discharge Characteristic of Fluorinated Graphene-like Graphite as a Cathode of Lithium Primary Battery

Abstract

Graphene-like graphite prepared by heating graphite oxide under vacuum at 800 °C was fluorinated by elemental fluorine in the presence of HF at room temperature. The interlayer spacing of the resulting material was 0.639 nm and it showed C_xF type characteristics. The fluorine content of it (x = 1.7) was higher than that obtained from natural graphite (x = 2.3). The discharge capacity of it as a cathode of lithium primary battery reached 940 mAh g⁻¹ at a low current density, which was 50% larger than the theoretical capacity based on the 100% discharge of fluorine.