Electrochemical and structural characterization of electroless nickel coating on Mg2Ni hydrogen storage alloy

Reiko Ohara, Chao Ho Lan, Chii Shyang Hwang

研究成果: Article同行評審

28 引文 斯高帕斯(Scopus)

摘要

Mg2Ni alloys were prepared by high-energy ball milling, followed by an electroless nickel coating, and their electrochemical properties were investigated. The results indicated that the thickness of Ni-P coatings determined the discharge capacity of Ni-coated Mg2Ni alloys. The measuring amount of deposited Ni particles was used to represent the thickness of Ni-P coatings. With an increase in the amount of deposited Ni particles, the discharge capacity reached to a maximum value of 148 mA h g-1 at the deposited Ni particles of 2320 ppm, followed by declining to 106 mA h g -1. From the electrochemical impedance spectroscopy experiments, the charge transfer resistance increased and meanwhile the diffusion coefficient decreased, if the amount of deposited Ni particles was greater than 2320 ppm. According to the X-ray diffraction studies, with an increase in the deposited amount of Ni particles the structure of Ni-P spherical particles, with a diameter of 50-250 nm, changed from nanocrystalline to amorphousness.

原文English
頁(從 - 到)S368-S372
期刊Journal of Alloys and Compounds
580
發行號SUPPL1
DOIs
出版狀態Published - 2013

All Science Journal Classification (ASJC) codes

  • 材料力學
  • 機械工業
  • 金屬和合金
  • 材料化學

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