Investigations of AB5-type negative electrode for nickel-metal hydride cell with regard to electrochemical and microstructural characteristics

Comparisons of metallic clusters imbedded in the surface oxide of AB2, AB5, and A2B7 alloys

“…The Misch-metal based AB 5 hydrogen storage alloy is the conventional choice for metal hydride (MH) electrode material used in nickel metal hydride (Ni/MH) batteries [1][2][3][4][5][6][7]. However, the limited discharge capacity of this alloy has prompted a search for alternative materials with higher hydrogen storage capacities.…”

New response in electrochemical impedance spectroscopy due to the presence of molybdenum on AB5-type alloys

“…According to XRD difraction patterns, AB5M0 sample is a single phase crystalline alloy, indexed in the corresponding CaCu 5 -type structure in the P6/mmm space group [27]. In the case of AB 5 M1 and AB 5 M2 samples there is coexistence between the CaCu 5 -type and CaCu 3 -type crystalline phase.…”

Surface modification of perovskite‐type oxide LaFeO3 with electroless nickel deposition for application in MH‐Ni batteries

“…Until now, AB 5 -type hydrogen alloys (A is rare earth metal; B is transition metal such as nickel, cobalt, and aluminum) have been used as the primary negative electrode material for MH-Ni batteries, which have achieved the theoretical discharge capacity limit (300-320 mAhg −1 ) and seem to have difficulty to meet the ever-increasing need of energy density. [10][11][12] Moreover, it is also found that the hydrogen storage property of AB 5 -type alloys may deteriorate in the working temperature region of EV batteries (40-80 • C). Therefore, it is necessary to develop new types of anode materials for MH-Ni batteries.…”