Novel electrochemical route for reduction of superconducting Bi 2Sr 2CaCu 2O 8+δ

Motohide Matsuda, Hideki Tamada, Kimihiro Yamashita, Takao Umegaki, Michihiro Miyake

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1 Citation (Scopus)


A novel electrochemical route was developed for reduction of the superconducting Bi 2Sr 2CaCu 2O 8+δ compound (Bi-2212) in the over-hole-doped state, which was undertaken employing an electrolyte solution consisting of benzoic acid dissolved in acetone. The reduction gave rise to enhancement of the critical temperature (T C) of Bi-2212 up to ∼90 K. This reduction effect on T C corresponded to the effect of annealing at elevated temperatures in reducing atmospheres. It appears that protons from the benzoic acid carboxyl groups were responsible for the reduction of the Bi-2212. Structural stability of the electrochemically reduced Bi-2212 was different from that of Bi-2212 annealed in reducing atmospheres.

Original languageEnglish
Pages (from-to)1032-1034
Number of pages3
JournalJournal of the American Ceramic Society
Issue number4
Publication statusPublished - Apr 1 1997

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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