Kanuchova M., Kozakova L., 2013, The Synthesis and Characterization of LiFeAs Superconductor by XPS Method, Chemical Engineering Transactions, 32, 2263-2268.
Oxypnictide materials are known for a complexity of their methods of preparation. In a previous paper an advantage of the small atomic radius of Li was taken in employment an electrochemical method to insert Li into the precursor FeAs to form LiFeAs at room temperature. The electrolyte was a liquid mixture of ethyl carbonate, diethyl carbonate, lithium hexafluorophosphate, and ethyl methyl carbonate in equal amounts by volume. In this work we present a simple electrochemical method of LiFeAs preparation by electrolysis in open air from molten LiCl electrolyte (melting point = 605 °C) with an inert electrode (graphite) as the anode and with FeAs pellet as the cathode. The superconducting transition temperature of the prepared LiFeAs material was about 17 K, which is consistent with the reported data. Obtained LiFeAs samples have been investigated by x-ray photoemission spectroscopy (XPS).
