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.
|Number of pages||3|
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - Apr 1 1997|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry