Abstract
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 973 K for 5 h; 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 200 mAh/g, and just 78 mAh/g for CeMgNi4 compound. NdMgNi4 compound could store 3.5 H/M of hydrogen under 2.5 MPa at 298 K, whilst it is difficult to absorb hydrogen at a higher temperature (473 K).
Original language | English |
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Pages (from-to) | 260-263 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 429 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 21 Feb 2007 |
Externally published | Yes |
Keywords
- Ball milling
- Discharge capacity
- Hydrogenation
- REMgNi
- Sintering