Synthesis, structure and electrochemical reactivity of CrO3-H2SO4- graphite bi-intercalation compounds prepared at room temperature

The paper deals with the synthesis, structure and electrochemical propertie s of CrO3-H2SO4-graphite bi-intercalation compound (CrO3-H2SO4-GBC) prepare d at room temperature. In contrast to the two step process in which CrO3 is first intercalated chemically followed by electrochemical bi-intercalation of H2SO4, the method described in the paper allows the simultaneous interc alation of CrO3 and H2SO4 into graphite to give CrO3-H2SO4-GBC. The electro chemical method appeared to be suitable both to distinguish the original Cr O3-H2SO4-GBCs of different structures and to enrich them with H2SO4 to prov ide stage-1 compound.