Incorporation of an ionic conducting alkali-metal halide into a two-dimensional copper oxide lattice through a novel stepwise intercalation route

Dae Hoon Park, Su Gil Hur, Jong Ho Jun, Seong Ju Hwang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A new lithium iodide intercalation complex, Li0.3I 1.0Bi2Sr1.4La0.1Ca 1.5Cu2Oy, has been synthesized by applying a novel stepwise intercalation technique. According to X-ray diffraction analysis, lithium iodide species are stabilized between Bi2O2 double layers, leading to an increase of basal spacing of ∼3.4 Å per host layer. X-ray photoelectron and X-ray absorption spectroscopic analyses reveal that there is little charge transfer between the intercalant lithium iodide layer and host lattice. In this context, the observed minute change of Tc upon Li-I intercalation can be regarded as evidence of the negligible contribution of interlayer coupling to superconductivity. On the other hand, ac impedance analysis demonstrates that the intercalation complex of lithium iodide species shows a Li+ ionic conductivity in the order of ∼10-6Ω-1 cm-1 at a low temperature of <70°C. In combination with an excellent electronic conductivity of the host lattice, this material can be a new type of mixed Li+ ionic-electronic conductor. From the viewpoint of synthesis, the present compound is the first example of the stabilization of an alkali-metal halide in the two-dimensional metal oxide lattice.

Original languageEnglish
Pages (from-to)18455-18459
Number of pages5
JournalJournal of Physical Chemistry B
Volume108
Issue number48
DOIs
Publication statusPublished - 2004 Dec 2

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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