Thermal Stability and Deintercalation of K-synthetic Graphite Intercalation Compounds at Elevated Temperatures

Oh, Won-Chun; 오원춘; Lee, Young-Hoon; 이영훈; Ko, Young-Shin; 고영신

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P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

e-Submission

Vol.11, No.2

PubReader Citation

Thermal Stability and Deintercalation of K-synthetic Graphite Intercalation Compounds at Elevated Temperatures

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

1998, v.11 no.2, pp.92-95

Oh, Won-Chun
Lee, Young-Hoon
Ko, Young-Shin

Oh, W., Lee, Y., & Ko, Y. (1998). Thermal Stability and Deintercalation of K-synthetic Graphite Intercalation Compounds at Elevated Temperatures. , 11(2), 92-95.

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Abstract

K-SGICs(synthetic graphite intercalation compounds) were synthesized in a modified two-bulb pyrex tube. The pressure in the two-bulb tube was maintained at approximately $10^{-3}$ torr for the reaction of potassium and graphite. Deintercalation process of the K-SGlCs obtained by the modified method was heat-treated by keeping in liquid paraffin between $25^{\circ}C$ and $1400^{\circ}C$. The thermal stability and the temperature dependence of the K-SGICs were characterized using differential scanning calorimeter(DSC) analyzer. Enthalpy and entropy for K-SGIC formations were calculated by confirming the deintercalation and thermodynamic exothermic reactions depending on the various temperatures. The structure changes and thermal stability of K-SGICs during the deintercalation reaction of potassium ions and the interlayer spaces of the synthetic graphite were identified by X-ray diffraction(XRD).