Funct. Mater. 2020; 27 (3): 497-499.


Kinetics of phase transitions in highly oriented graphite intercalated with potassium

I.F.Mikhailov, E.N.Zubarev, A.I.Mikhailov, V.V.Mamon, S.S.Borisova, S.V.Surovitskiy

Department of Physics of Metals and Semiconductors, National Technical University "Kharkiv Polytechnic Institute", 2 Kyrpychova Str., 61002 Kharkiv, Ukraine


The kinetics of structural transformations of atomic-layered structures of highly oriented pyrographite intercalated with potassium (C60K, C36K, C24K, and C8K) at THOPG = 300°C has been studied by in situ XRD. The shape of the kinetic curves suggests a complex nature of the rearrangement of the structure of C24K into C36K and C48K: first, C36K is formed from C24K, and then C48K. The C60K phase with a minimum potassium content is observed only at the final stage (t = 24 h), when the remaining phases are practically not detected. Only the C60K phase with the lowest potassium content is found to be structurally stable for 5 months.

intercalation-deintercalation kinetics, high-oriented pyrolytic graphite, potassium, X-ray diffraction.

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