Electrochemical intercalation of alkali metals into superconducting oxide phases

W. Macklin , Sophie Claude , Valerie Brien (1, 2) , P. Moseley

1 IMN - Institut des Matériaux Jean Rouxel
2 IJL - Institut Jean Lamour

The electrochemical intercalation of alkali metals into several superconducting oxide phases has been carried out by galvanostatic discharge of an electrochemical cell. In each case intercalation appears to result in a decrease in the volume fraction of the superconducting phase. Intercalation of lithium into an indium-doped Bi-Sr-Ca-Cu oxide gave a material of approximate composition Lio,23Bi,,,lno,,Sr2CaCu208+a, in which the superconducting onset temperature, T,, was increased by ca. 15 K above that of the original compound. Intercalation into other superconducting bismuth oxides produced increases in 7, in some cases, and decreases in others. Intercalation into the thallium 2212 superconductor produced no discernible change in T,.

Mots clés: Electrochemical intercalation; Intercalation; Superconducting oxide

Domaines: Matériaux; Chimie inorganique

W. Macklin, Sophie Claude, Valerie Brien, P. Moseley. Electrochemical intercalation of alkali metals into superconducting oxide phases. Journal of Materials Chemistry, 1992, 2 (4), pp.439-441. ⟨10.1039/jm9920200439⟩. ⟨hal-02882494⟩