Article ID Journal Published Year Pages File Type
1292561 Journal of Power Sources 2006 4 Pages PDF
Abstract

Mg–Ce alloy was prepared by induction melting under vacuum, hydrided firstly and then Mg–Ce/Ni composite was obtained by mechanical milling Mg–Ce hydrides under Ar for 50 h with addition of nano-sized Ni powder. XRD results showed CeMg12 formed in melted alloy. CeMg12 disappeared and CeH2.53 emerged during subsequent hydriding. The phase composition was not changed during ball milling process. Compared with Mg and Mg/Ni, Mg–Ce/Ni composite showed significant hydriding/dehydriding performance without any prior activation. The enthalpy of hydride formation for Mg–10.9 wt.% Ce/10 wt.% Ni composite was −70.58 kJ mol−1 H2. Improved hydrogen storage properties were attributed to the catalytic effect of addition of nano-sized Ni particles and existence of CeH2.53, as well as the grain refinement, defects, etc. in the material introduced by ball milling process.

Related Topics
Physical Sciences and Engineering Chemistry Electrochemistry
Authors
, , , , , ,