An Electrochemical Investigation of Mg-Ni Hydrogen Storage Alloys by Mechanical Alloying

Agaoglu G., Orhan G.

Symposium on Magnesium Technology / In-Situ Methods for Unraveling Structure-Property Relationships in Light Metals Symposium held during the 146th TMS Annual Meeting and Exhibition, California, Amerika Birleşik Devletleri, 26 Şubat - 02 Mart 2017, ss.375-380 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası:
  • Doi Numarası: 10.1007/978-3-319-52392-7_53
  • Basıldığı Şehir: California
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.375-380
  • İstanbul Üniversitesi Adresli: Evet

Özet

The characteristics and mechanisms of enhanced electrochemical properties for Mg-Ni alloy produced by mechanical alloying MA were investigated by electrochemical measurements. Electrochemical hydrogen storage properties were characterized by cyclic charge-discharge experiment, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization methods. The phase composition and microstructure of Mg-Ni alloy were detected by X-ray diffraction (XRD) and scanning electron microscope (SEM). XRD showed that the alloys exhibit dominatingly amorphous structures. And also, 20 h milling was enough to obtain amorphous/nano-crystalline alloy structure. The best initial discharge capacity (489 mA h g(-1)) and acceptable capacity retaining rate (48%) were obtained for the 20 h milled Mg50Ni50 alloy.