Electrochemical Impedance Study of BSCCO (2212) Cuprate Ceramic Additive to the Zinc Electrode in Ni-Zn Batteries
Electrochemical Impedance Study of BSCCO (2212) Cuprate Ceramic Additive to the Zinc Electrode in Ni-Zn Batteries

Summary/Abstract: Conductive cuprate BSCCO (2212) ceramics, exhibiting superconductivity a low temperatures (80 – 100К) can find other applications as well, such as an additive in the zinc electrode of nickel-zinc batteries. Ni-Zn cells are a potential cheaper alternative to replace toxic nickel-cadmium batteries. The positive effect of cuprate ceramic additives has been previously demonstrated. The study, presented here is focused on the electrochemical characterization of Bi2Sr2CaCu2Ox (BSCCO 2212) nanocomposite conductive ceramics as an additive to the zinc electrode at 25oC and 50oC in an alkaline electrolyte containing KOH and Na3PO4. Three coin type electrodes (15mm in diameter) were investigated by Electrochemical Impedance Spectroscopy measurements by a Bio-logic SP-200 potentiostat in a wide frequency range (106 - 0.1 Hz). The tests were performed in a three-electrode electrochemical cell with different negative electrodes – one with “classic” conductive carbon additive, another with BSCCO 2212 additive, and the third without any additives (only ZnO). The obtained impedance spectra are compared and equivalent circuit models are proposed.

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