Über die stufenweise Oxidation von Graphit in nichtwäßrigen, neutralen Elektrolyten / On the Stage-Wise Oxidation of Graphite in Nonaqueous, Neutral Electrolytes
Open Access
- 1 November 1972
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 27 (11) , 1294-1298
- https://doi.org/10.1515/znb-1972-1102
Abstract
Electrolytic lamellar compounds of graphite with well-defined oxidation stages were indicated by characteristic changes in the potential of a graphite anode during galvanostatic oxidation in nonaqueous, aprotic electrolytes. In analogy to the well-known graphite salts in acid media e. g. C24HSO4·2 H2SO4 1,2 a Cn-stage with n = 24 besides others with n>24 was obtained in solutions of LiClO4, NaBF4 or KPF6 in propylene carbonate; further oxidation of graphite does not cause significat changes in the potential of the electrode. Such defined stages of oxidation were observed at graphite anodes in various nonaqueous electrolytes. According to the present results simple salt-like lamellar compounds of the general type CnX are proposed; contrary to graphite salts prepared in concentrated acids, intercalation of free electrolyte is not a matter of priciple.Keywords
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