The preparation and morphology characteristics of exfoliated graphite derived from HClO4-graphite intercalation compounds |
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| Authors: | Xing Hai Wei Lang Liu Jing Li Shi |
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| Affiliation: | a Key Laboratory of Carbon Materials Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
b Graduate School of Chinese Academy of Science, Beijing 100039, China |
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| Abstract: | Natural flake graphite (NFG) and perchloric acid (PA) were used as host material and intercalating agent, respectively, to synthesize graphite intercalation compound (GIC) through chemical method in the binary HClO4-graphite system. The HClO4-GIC was exfoliated above 200 °C to produce exfoliated graphite (EG). The exfoliating ability of HClO4-GIC was characterized through its exfoliated volume (EV), i.e. the apparent volume of EG of per unit weight. The effect of some technological parameters on the EV was discussed in detail. The HClO4-GIC prepared under the condition: the intercalating reaction temperature, time and the mass ratio of PA to NFG being 120 °C, 30 min and 5/1, respectively, has an outstandingly exfoliating ability at low temperature (200 °C) and its EV can attain 360 cm3/g. In addition, the morphology characteristics of EG were characterized by scanning electron microscope. |
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| Keywords: | HClO4-graphite intercalation compound Exfoliated graphite Characterization methods Microstructure |
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