Electrochemical Formation of a Covalent-Ionic Stage-1 Graphite Intercalation Compound with Trifluoroacetic Acid
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- Electrochemical Formation of a Covalent-Ionic Stage-1 Graphite Intercalation Compound with Trifluoroacetic Acid
- Gurzeda, Bartosz; Kim, Tae In; Arsakay, Madi; Choe, Myeonggi; Lee, Sun Hwa; Lee, Zonghoon; Min, Seung Kyu; Ruoff, Rodney S.
- Issue Date
- AMER CHEMICAL SOC
- CHEMISTRY OF MATERIALS, v.34, no.1, pp.217 - 231
- A pure stage-1 graphite intercalation compound (GIC) has been prepared by the electrochemical oxidation of graphite in trifluoroacetic acid (CF3COOH). During the CF3COOH-GIC formation, covalent as well as ionic bonds between the trifluoroacetic acid and graphite layers are formed. Electrochemical reduction of the stage-1 GIC leads to the deintercalation of ionically bonded intercalate, yielding the stage 2 covalent GIC. The interlayer spacing is 8.10 angstrom for stage-1 and 11.62 angstrom for stage-2 GIC. Further electrochemical oxidation of stage-1 CF3COOH-GIC does not lead to the exfoliation of the GIC product, and the GIC has relatively high stability in air.
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