Electrochemical hydrogen storage characteristics of Mg–Pd–Ni ternary alloys

✍ Scribed by Mustafa Anik; Gizem Özdemir; Nilüfer Küçükdeveci

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 565 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2011.03.072

✦ Synopsis

a b s t r a c t Mg 1Àx Pd x Ni (x ¼ 0.03, 0.05, 0.06, 0.07, 0.08, 0.10, 0.20) type alloys were synthesized by mechanical alloying and their electrochemical hydrogen storage characteristics were investigated. The XRD studies showed that Mg 6 Pd and MgePd phases form in the high-Pdcontaining alloys. The discharge capacities of the alloys increased sharply up to 15 h milling. Further increase up to 25 h did not cause change in the discharge capacities considerably. Among the Mg 1Àx Pd x Ni ternary alloys, Mg 0.93 Pd 0.07 Ni alloy was observed to exhibit the best charge/discharge cyclic performance. The hydrogen storage capacity of the high-Pd-containing alloys (Mg 1Àx Pd x Ni; x > 0.07) deteriorated as Pd content of the alloy increased. This observation was attributed to the MgePd phase formations. According to the EIS experiments as Pd atomic ratio increased up to 0.07 the charge transfer resistances of the alloys decreased. Further increase in Pd atomic ratio, however, brought about the increase in the charge transfer resistances.