Hydrides of LaNi compounds

Function of cobalt in the new type rare-earth Mg-based hydrogen storage electrode alloys

“…It can be attributed to that the cell volumes are enlarged after partial substitution of Ni by Co. With the increase of Co content, the maximum hydrogen storage capacity of the alloys first increases from 1.44 (xZ0) to 1.55 wt% (xZ0.75) and then decreases, which can be ascribed to the relative change of the content of the (La, Mg)Ni 3 phase and the LaNi 5 phase in the alloys. This change in the hydrogen storage capacity with varying phase abundance is consistent with the reports of Oesterreicher et al [18] and Takeshita et al [19]. With the increase of Co content, the maximum discharge capacity increases from 397.5 (xZ0) to 403.1 mA h/g (xZ 0.75) and then decreases to 389.2 mA h/g (xZ1.15).…”

Optimization of the La substitution by Mg in the La 2 Ni 7 hydride-forming system for use as negative electrode in Ni-MH battery

“…at 10 MPa in rather good agreement with previous measurements (11.3H/f.u.) reported by Oesterreicher and Bittner [20]. For desorption, this capacity is hardly recovered with a clear shift between absorption and desorption indicating some irreversible process.…”

Hydrogenation of CeNi: hydride formation, structure and magnetic properties

“…Thus, there are communications on the preparation of LaNi hydrides with the composition LaNiH 2.60 [9], LaNiH 3.6 [10] and LaNiH 3.85 [11]. More recently Verbetskii et al [12] established hydriding at room temperature and a hydrogen pressure of 0.05-0.1 MPa to lead to synthesis of LaNiH 3.5 hydride with the same structure as that of the initial alloy.…”