DEVELOPMENT OF Pt-Cr COATED SS316L ELECTRODES FOR PEM WATER ELECTROLYZERS BY SELECTIVE LASER MELTING METHOD

Kıstı M., Özdoğan E., Uysal S., Kaya M. F.

23rd World Hydrogen Energy Conference, İstanbul, Türkiye, 26 - 30 Haziran 2022, ss.60

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: İstanbul
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.60
  • Erciyes Üniversitesi Adresli: Evet

Özet

Proton exchange membrane (PEM) water electrolyzer (PEMWE) is used to obtain a high amount of

hydrogen cleanly from water. However, to make PEMWE common in everyday life, their cost must be

reduced, and the performance of these systems must be increased. Thus, alternative materials should

be developed to obtain low-cost PEMWE systems. In this study, stainless steel 316L (SS316L) is used

as gas diffusion electrode (GDE) materials. The selective laser melting (SLM) method is selected to

produce the SS316L electrode. To enhance to SS316L electrodes’ corrosion resistance and kinetic

activity, SS316L electrodes are coated with Pt different thickness values using electron beam

evaporation method (EBM) with a Cr interlayer film. Electrochemical properties of SS316L electrodes

have been investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV), and

electrochemical impedance spectroscopy (EIS) techniques. Durability of SS316L electrodes have been

conducted by Tafel and chronoamperometry (CA) techniques. The surface morphologies of SS316L

electrodes have been characterized by field emission scanning electron microscopy (FE-SEM), energy

dispersive X-ray analysis (EDX), X-ray diffractometers (XRD), and X-ray fluorescence (XRF) analysis.

As a result, electrochemical performance, kinetic activity, and corrosion resistance of the electrodes are

enhanced significantly with Pt-Cr material by EBM coating.