Promising electrochemical hydrogen storage properties of thick Mg–Pd films obtained by insertion of thin Ti interlayers

Abstract

In this paper, the structures of 500 nm thick Mg-Pd films were tailored by insertion of 1 nm thin Ti interlayers, and their electrochemical hydrogen storage properties were investigated. Results showed that thin Ti interlayers in the Mg bulk film could significantly improve the discharge properties of thick Mg-Pd films. The Mg100-Ti1 sample exhibited the most promising electrochemical properties, including a shorter activation period, larger discharge capacity, superior cyclic stability and high rate discharge capability, due to the creation of numerous interfaces and nucleation sites, reduction of the hydrogen diffusion path, and synergetic catalytic effects of Pd and Ti layers.

Atomistic simulation of deformation twinning in nanocrystalline body-centered cubic U–Mo alloys

“…5 Mo (molybdenum) exhibits a high solubility (about 35 at%) in γ-U at high temperatures over 833 K. Below this temperature, however, Mo-dissolved γ-U alloy will be decomposed into U 2 –Mo and α-U. 6,7 A previous study has suggested that U alloyed with Mo can stabilize its bcc structure at low temperatures. 8 U–Mo alloys having a molybdenum concentration of 6–10 wt% are considered the most promising candidates for fuels.…”

Promising hydrogen storage properties of cost-competitive La(Y)–Mg–Ca–Ni AB3-type alloys for stationary applications

“…1,2 Compared with the gas cylinders, metal hydrides have attracted lots of attention around the world due to the advantages of much higher volume density (70-150 kg m À3 ), more satisfying safety performance, much higher hydrogen purity, and much lower moderate operating conditions. [3][4][5][6][7][8][9][10][11][12] In recent years, the La-Mg-Ni based hydrogen storage alloys, especially the alloys with superlattice structures of AB 3 -, A 2 B 7and A 5 B 19 type, have been a focus of studies. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] These structures possess characteristic layered structure consisting of one MgZn 2 -type (A 2 B 4 ) cell and one to three CaCu 5 -type (AB 5 ) cells stacking along c-axis, which are considered as the promising candidates to replace current AB 5 -type alloys as negative electrodes of MH-Ni batteries.…”