Electrochemical intercalation of lithium into layered niobates ACa2Nb3O10 (A = K, Rb, Cs)

Ichiro Nagai, Yuji Abe, Masatune Kato, Yoji Koike, Masato Kakihana

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Abstract

We prepared Li-intercalated layered niobium oxide LixACa2 Nb3O10 (A = K, Rb, Cs) an electrochemical technique. The host compounds ACa2Nb3O10 were synthesized by a solid state reaction method at 850 - 1150°C for 10 - 12h. Each of the cyclic voltammograms of these compounds had one cathodic peak at approx. -3 V, indicating that the Li-intercalation occurred at this voltage. All of the intercalated compounds LixACa2Nb3O10 (A = K, Rb, Cs) showed superconductivity at 4 - 5 K, and their x-ray diffraction pattern remained almost unchanged in spite of the Li-intercalation. For LixRbCa2Nb3O10, no superconductivity appeared up to x = 0.34 and 0.46 Tc (determined as the onset of the Missner effect) was constant at 4K, and for x=0.62 Tc decreased slightly to 3K.

Original languageEnglish
Pages (from-to)1124-1127
Number of pages4
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume47
Issue number10
DOIs
Publication statusPublished - 2000 Oct

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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