Effect of Mo–Ni treatment on electrochemical kinetics of La–Mg–Ni-based hydrogen storage alloys

✍ Scribed by Yuan Li; Shumin Han; Zhiping Liu

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 608 KB
• Volume: 35
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.08.141

✦ Synopsis

In order to improve kinetic properties of LaeMgeNi-based hydrogen storage alloys, MoeNi treatment was applied to La 0.88 Mg 0.12 Ni 2.95 Mn 0.10 Co 0.55 Al 0.10 alloy powders. FESEM results showed that after MoeNi treatment some network-shaped substance with nano-size formed on the surface of the alloy particles. The EDS results revealed increase in Ni content and emerge of Mo element. EIS and Linear polarization showed that charge-transfer resistance decreased and exchange current density increased for the treated alloy electrode, and the high rate dischargeability (HRD) was consequently improved. HRD at 1500 mA/g increased from 22.5% to 39.5%. Mo-and Ni-single treatments were performed compared with the MoeNi treatment, and the results showed that the single treatment improved HRD slightly, far less than the MoeNi treatment.