Effect of rare earth on lattice size and equilibrium hydrogen pressure for AB5-type MmNi3.55Co0.75Al0.30Mn0.40

Sustainable Hydrometallurgical Recovery of Valuable Elements from Spent Nickel–Metal Hydride HEV Batteries

“…The strongest peaks belong to LaNi 5 and nickel-cobalt hydroxide in the anode and cathode respectively. These results are consistent with the characterization of the same battery [22] and with other studies on the characterization of similar materials [39,40].…”

Investigations on the kinetics properties of the electrochemical reactions of MlNi3.55Co0.75−xMn0.4Al0.3(Cu0.75P0.25)x (x=0.0, 0.1, 0.2, 0.3, 0.4) hydrogen storage alloys

“…How to extend the application of the nickel/metal hydride secondary batteries used as dynamic power in hybrid electric vehicles and electric automobiles is the most important theme in the last decade [1][2][3][4]. But the high-rate discharge capability, which is determined by the kinetics properties of the electrochemical reactions, is still a serious obstacle to the widespread applicability in dynamic power fields [5,6].…”

The relationship between discharge capacity of LaNi5 type hydrogen storage alloys and formation enthalpy

“…Wei et al [9] researched electrochemical properties of the Co-free LaNi 4.2−x Al 0.35 Mn 0.45 Si x (x = 0-0.35) alloys and found that the maximum discharge capacity of the alloys decreases from 344.8 mAh g −1 (x = 0) to 260.2 mAh g −1 (x = 0.35). Endo et al [10] founded that among MmNi 3.55 Co 0.75 Al 0.30 Mn 0.40 , the Ce contained ones showed different characteristics in terms of anisotropy of lattice parameters and equilibrium hydrogen pressure. Tan et al [11] revealed that the activity of electron transfer reaction of hydrogen oxidation on the alloy surface increased, the maximum current output ability of the alloy and the hydrogen diffusion coefficient in the bulk of alloy were improved, and the capacity decay rate was reduced significantly as the Ce content in the La 1−x Ce x Ni 5 alloy increased.…”