Electrode properties of melt-spun Mg–Ni–Nd amorphous alloys

• Published in: Journal of power sources 2006-09, Vol.160 (1), p.684-687
• Main Authors: Huang, L.J., Liang, G.Y., Sun, Z.B., Wu, D.C.
• Format: Article
• Language: English
• Subjects: Amorphous alloy; Applied sciences; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrode properties; Exact sciences and technology; Magnesium alloys; Melt-spun
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2005.12.072

Amorphous and nanocrystalline Mg-based alloys (Mg 60Ni 25) 100− x Nd x ( x = 2, 5, 10, 15) were prepared by rapid solidification. The microstructure of the as-quenched ribbons was characterized by TEM, X-ray and electron diffraction. The electrode properties of these alloys were measured. The experimental results showed that the discharge capacities increased with increasing Nd atomic content and the optimum Nd content is between in 10–15 mol%. The highest discharge capacity reached more than 580 mAh g −1 at the discharge current densities of 50 mA g −1 for (Mg 60Ni 25) 90Nd 10 samples. The nanocrystalline (Mg 60Ni 25) 98Nd 2 alloy showed the lowest discharge capacity compared to the other Mg–Ni–Nd amorphous alloys. The alloy (Mg 60Ni 25) 90Nd 10 displays the broadest discharge potential flat from 1.3 to 1.0 V. It was conformed that the increase of discharge capacities is not only a function of the sample composition but strongly influenced by the amorphous phase proportion in the alloys.