ChemInform Abstract: The Hydrogen Storage Properties of MmNi3.55Co0.75Mn0.7-xAlx Compounds ( Mm: Mischmetal).

✍ Scribed by J. WU; J. LI; W. ZHANG; F. MUO; L. TAI; R. XU

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 29 KB
• Volume: 28
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199734016

✦ Synopsis

The Hydrogen Storage Properties of .

-Studies on the pressure-capacitytemp. curves and the electrode potentials of the title alloys with x = 0, 0.1, 0.2, 0.3, 0.4 with an Mm composition of La 24%, Ce 55%, Pr 5%, Nd 15% show that by Al substitution for Mn the hydride formation pressure is lowered and the hysteresis between H2 absorption and desorption pressure is reduced. Substitution of a small amount of Al for Mn increases the hydrogen storage capacity of the alloy. With increasing Al content the slope of the plateau region and the discharge electrode potential increase and the hydrogen storage capacity decreases. MmNi3.55Co0.75Mn0.6Al0.1 is shown to be the best alloy composition for secondary battery application. -(WU,