Skip to main content
padlock icon - secure page this page is secure

Open Access Does aluminum and niobium substitution for nickel actually improve the electrochemical performance of Mg2 Ni?

Download Article:
 Download
(PDF 9,458.5 kb)
 
In the present investigation, Mg67 Ni(33–x) Nb1 Al x ( x = 0, 1, 3 and 5 wt%) hydrogen storage alloys were synthesized using high energy ball milling technique. Ball milled powders were subjected to various characterization techniques viz., X-ray diffraction, Scanning electron microscopy with an Energy-dispersive X-ray spectroscopy (EDS) and Transmission electron microscopy. Effect of Al and Nb substitution on the inter-planar shift and its corresponding implications on lattice strain, crystallite size and unit cell volume of Mg2 Ni compound were also discussed. Activation energy of the milled powders was calculated using Kissinger analysis. Mg67 Ni33 powder exhibit lower activation energy than others. Cyclic voltammetry, electrochemical impedance spectroscopy and charge–discharge studies were done on the developed electrode materials. Increasing Al substitution for Mg increases the cycling stability of electrode materials from 68 (x = 0) to 77% (x = 5).

15 References.

No Supplementary Data.
No Article Media
No Metrics

Keywords: ACTIVATION ENERGY; CHARGE– DISCHARGE KINETICS; INTER-PLANAR SHIFT; MECHANICAL ALLOYING; NANO-STRUCTURED MG2 NI ALLOY

Document Type: Research Article

Publication date: April 1, 2015

More about this publication?
  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more