Influence of TiB2 addition upon thermal stability and decomposition temperature of the MgH2 hydride of a Mg-based mechanical alloy

Hydrogen storage properties of nanocrystalline MgH2 and MgH2/Sn nanocomposite synthesized by ball milling

“…For the nanocrystalline MgH 2 prepared by different ball milling conditions, the results of the hydrogen desorption were well consistent with those obtained for the hydrogen absorption reported in a previous paper [10]. Moreover, the TDS results for the nanocrystalline MgH 2 obtained by ball milling with cyclohexane were superior to data reported on magnesium hydride [2,15,16].…”

“…However, their slow sorption kinetics and high thermodynamic stability of the hydride is a serious barrier to practical applications. Interest has recently centered on the topic of modifying the hydrogen storage properties of magnesium hydride [1][2][3][4]. It has been shown that for magnesium-containing hydrogen storage materials mechanical milling [5] is an effective way of activating magnesium or improving their sorption properties by changes in microstructure [6] or a particle size reduction [7][8][9].…”

Structural and hydriding/dehydriding properties of Mg–La–Ni-based composites

“…By adjusting the chemical compositions of the Mg-based alloys, enhanced hydrogen storage properties have been obtained. These studies include multi-alloying of Mg with other elements [10][11][12][13][14][15][16][17], adding catalysts to the alloys [18][19][20][21] and preparing Mg-based composites like Mg-TiZrMnVFeNi [22], Mg-MmNi 5 [23], Mg-ZrMn 2 [24], Mg-NiCo 2 O 4 [25], Mg-LiNH 2 [26], Mg-TiB 2 [27], Mg-TiVMn [28], and so on.…”

Electrochemical hydrogen storage characteristics of nanocrystalline Mg20Ni10−xCux (x=0–4) alloys prepared by melt-spinning

“…Recham et al [12] found that the hydrogen absorption property of ball-milled MgH 2 can be enhanced by adding NbF 5 , and the milled MgH 2 + 5 wt.%NbF 5 composite desorbs 3 wt.% H 2 at 150 • C. Dobrovolsky et al [13] synthesized a MgH 2 (50 wt.%) + TiB 2 (50 wt.%) composite by intensive mechanical milling and found that TiB 2 addition decreases the dissociation temperature of the MgH 2 hydride by about 50 • C. Kohno and Kanda [14] have obtained a large discharge capacity of 750 mAh/g at a current density of 20 mA/g for modified Mg 2 Ni alloys. The result obtained by Cui et al [15] confirmed that amorphous and/or nanocrystalline Mg-Ni-based alloys can electrochemically absorb and also desorb large amounts of hydrogen already at room temperature.…”