Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-14T06:15:10.373Z Has data issue: false hasContentIssue false
  • English
  • Français

Intercalation of Sodium-Potassium Alloys Into Graphite

Published online by Cambridge University Press:  10 February 2011

L. Antoine ,
J.C. Gachon  and
D. Guerard
L. Antoine
Affiliation:
Laboratoire de Chimie du Solide Minéral, UHP Nancy I, BP 239, 54506 Vandoeuvre-1és-Nancy Cedex, France
J.C. Gachon
Affiliation:
Laboratoire de Chimie du Solide Minéral, UHP Nancy I, BP 239, 54506 Vandoeuvre-1és-Nancy Cedex, France
D. Guerard
Affiliation:
Laboratoire de Chimie du Solide Minéral, UHP Nancy I, BP 239, 54506 Vandoeuvre-1és-Nancy Cedex, France
Get access

Abstract

The intercalation, at room temperature, of the sodium-potassium eutectic into graphite is performed, in a glove box under purified argon. It leads to a high alkali metal content powder. The annealing under vacuum, at 200°C for two days leads to a pure first stage compound whose formula is NaK2C12 with a color and a structure close to that of KC8. This phase is unstable and decomposes slowly in a mixture of KC8 and free alloy. However, this free alloy, which is liquid at room temperature, remains as inclusions between the graphene layers and the compound remains as a powder which can be useful for some applications when one needs large quantities of an alkali metal “solid” at room temperature, e.g. for gas purification (it reacts with oxygen and with moisture), for rapid and intense heat provider (it burns in air and the carbon is also participating to the heating), for ionic polymerization catalyst…

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 548: Symposia EE – Solid State Ionics V , 1998 , 49
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Massalski, T.B., Okamoto, H., Subramanian, P.R. and Kacprzak, L., in Binary Alloy Phase Diagrams, Second Edition, (ASM International, 1990) 3, p. 2377 Google Scholar
2. Asher, R.C. and Wilson, S.A., Nature, London 181, p.409 (1958) and R.C. Asher, J. Inorg. Nucl. Chem. 10, p. 238 (1959)Google Scholar
3. Métrot, A., Guérard, D., Billaud, D. and Hérold, A., Synth. Met. 1, p. 363 (1980)Google Scholar
4. Nixon, D.E. and Parry, G.S., J. Phys. C (Solid St. Phys.) 2–2, p.1732 (1969)Google Scholar
5. The heat of fusion was determined by L. Antoine for different Na/K ratios and presents a maximum for compositions close to Na2K.Google Scholar