Abstract
New graphite intercalation compounds were obtained by intercalation of potassium superoxide KO 2 into graphite in presence of potassium metal. Stage 1 (assigned formula C 4KO 2, I c = 8.44 Å) and stage 2 (assigned formula C 8KO 2, I c = 11.75 Å) compounds were isolated. Quadruple intercalate layer K-O-O-K is supposed. The results of magnetic susceptibility measurements suggest nonmagnetic states of oxygen species. Metal-like temperature dependence of c-axis resistivity was obtained in 1.5–300 K range where the resistivity values at room temperature are 0.07 Ωcm and 0.81 Ωcm for C 4KO 2 and C 8KO 2, respectively.
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