An efficient medium to intercalate metals into graphite: LiCl-KCl molten salts

被引：15

作者：

Fauchard, Melissa ^{[1
]}

Cahen, Sebastien ^{[1
]}

Bolmont, Mickael ^{[1
]}

Medjahdi, Ghouti ^{[1
]}

Lagrange, Philippe ^{[1
]}

Herold, Claire ^{[1
]}

机构：

[1] Univ Lorraine, CNRS, IJL, F-54000 Nancy, France

来源：

CARBON | 2019年 / 144卷

关键词：

SUPERCONDUCTIVITY;

D O I：

10.1016/j.carbon.2018.12.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new synthesis method using molten salts has been achieved allowing the intercalation of metals (e.g europium) into graphite. This method consists in dissolving various metals in a LiCl-KCl medium intended to be intercalated. In this work, many reactions are carried out by dissolving metals of first and second columns of the periodic table (Li, Na, K, Mg, Ca, Sr, Ba) in the molten salts before performing intercalation reactions for periods ranging from few minutes to several days and for temperatures included between 400 and 450 degrees C. The obtained compounds are then characterized by X-ray diffraction. Three different behaviors have been observed. With alkali metals, the obtained GIC is systematically LiC6 GIC. Magnesium leads to a sample of pure graphite remaining pristine. In case of alkaline earth metals, calcium, strontium and barium, the intercalation of the metal is systematically observed. The method presented in this paper reports for the first time the synthesis of a bulk SrC6 GIC. Finally, the intercalation mechanism using this medium has been deduced from these results and thanks to a study performed by ex situ X-ray diffraction in the case of the formation of the EuC6 GIC. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：171 / 176

页数：6