LiCl-KCl eutectic molten salt as an original and efficient medium to intercalate metals into graphite: Case of europium

We present the successful intercalation of europium into graphite by using an original method based on LiCl-KCl molten salts mixture. After solubilization of europium in the liquid chlorides mixture at 450 °C, reactivity toward graphite is investigated. We evidence the formation of the first stage E...

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Bibliographic Details
Published in:Carbon (New York) 2018-07, Vol.133, p.379-383
Main Authors: Bolmont, Mickaël, Cahen, Sébastien, Fauchard, Mélissa, Guillot, Romain, Medjahdi, Ghouti, Berger, Pascal, Lamura, Gianrico, Lagrange, Philippe, Hérold, Claire
Format: Article
Language:English
Subjects:
Alkalies
Analytical techniques
Antiferromagnetism
Chemical Sciences
Chloride
Europium
Graphite
Intercalation
Ion beams
Lithium chloride
Magnetic measurement
Material chemistry
Metals
Molten salts
Potassium chloride
Solubilization
X-ray diffraction
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Summary:We present the successful intercalation of europium into graphite by using an original method based on LiCl-KCl molten salts mixture. After solubilization of europium in the liquid chlorides mixture at 450 °C, reactivity toward graphite is investigated. We evidence the formation of the first stage EuC6 Graphite Intercalation Compound (GIC) with a repeat distance Ic = 487 pm. Using 00l X-ray diffraction and ion beam analysis, we show that europium is intercalated into the bulk with remarkable degree of homogeneity. This is also confirmed by magnetic measurements that clearly put in evidence the antiferromagnetic transition at about TN = 40 K. Below such temperature the characteristic step-like behavior of metamagnetic transitions was found by isothermal magnetization measurements, that is generally visible only in highly pure samples. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2018.03.015