Production and characterization of Cu-doped perovskite thin film electrodes for supercapacitors

Tezel M., Gueven F. N., KARİPER İ. A.

INORGANIC CHEMISTRY COMMUNICATIONS, cilt.143, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 143
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.inoche.2022.109766
  • Dergi Adı: INORGANIC CHEMISTRY COMMUNICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, DIALNET
  • Anahtar Kelimeler: Perovskite, Supercapacitor electrode, Nanocomposite, In-plane capacitance, In-plane time-dependent I-V method
  • Erciyes Üniversitesi Adresli: Evet

Özet

In this study, perovskite thin-film electrodes were produced by doping different amounts of copper (Cu% = 1, 2, 4, 6, 8) on fluorine tin oxide (FTO) substrates at room temperature by chemical bath deposition (CBD) and dip -coating methods. The structural properties of these thin films were determined by X-ray diffraction (XRD), and their chemical compositions were analyzed by EDX (Energy Dispersive X-ray). Surface morphologies were imaged with FESEM. Time-dependent current-voltage (I-V) measurements were taken with a Keithley 2400 SourceMeter. The specific capacitance of each sample was measured at room temperature, in the dark at scan-ning rates of 10, 25, and 50 mV/s in the range of-0.5 to 0.7 V. The maximum specific capacitance was observed on 2% Cu-doped perovskite thin film (761 F/g) at the lowest scanning speed (10 mV/s). Regarding EDX analysis, 0.44-3.20-1.23-1.83-0.98% Cu atoms were detected on the surface of 1-2-4-6-8% Cu-doped structures. The higher precipitation in the structure will cause a resistance between the bands and thus decrease the load storage capacity.