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Effect of sintering conditions on the formation of single-phase NdMgNi4 compound and its hydrogen storage properties
Ist Teil von
Journal of alloys and compounds, 2007-02, Vol.429 (1-2), p.260-263
Ort / Verlag
Lausanne: Elsevier
Erscheinungsjahr
2007
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
Effects of different sintering conditions on the formation of single-phase NdMgNi4 compound and its electrochemical properties have been investigated. XRD analysis shows that an ideal single-phase compound of NdMgNi4 can be synthesized by sintering the pressed tablets of mixture of Mg, Ni and NdNi powders under 973K for 5h; single-phase compounds of REMgNi4 (RE=La, Ce, Pr) can be synthesized in this way as well. The electrochemical properties were measured by simulated battery tests. The maximum discharge capacity of NdMgNi4 compound was about 200mAh/g, and just 78mAh/g for CeMgNi4 compound. NdMgNi4 compound could store 3.5H/M of hydrogen under 2.5MPa at 298K, whilst it is difficult to absorb hydrogen at a higher temperature (473K).