V.V. Shtender

Electrode Materials Based on LaMgNi4–xCox (0 ≤ x ≤ 1) Alloys

The LaMgNi4–xCox (x = 0, 0.33, 0.67, 1) alloys are prepared by sintering and prolonged heat treatment at 500°C, with the main cubic phase of MgCu4Sn type. The alloy samples ball-milled in an argon atmosphere show the glass-forming ability. Electrochemical experiments of the LaMgNi4–xCox electrodes are performed at charge and discharge current densities of 100 mAh. The maximum discharge capacity is exhibited by the powdered alloys (218–302 mAh/g) compared to the ball-milled ones (92–134 mAh/g). The cobalt content of the LaMgNi4–xCox alloys influences the electrode characteristics. The highest discharge capacity is shown by the powdered alloy with x = 0.33. The ball-milled alloys have slightly higher cyclic stability.

Phase-Structural and Electrochemical Properties of La2MgNi9 Alloys

Multiphase La2MgNi9alloys are synthesized by induction melting. The crystalline structures of all phases in the alloys are determined with X-ray diffraction. The La2MgNi9electrodes with nickel as a binder and electrical conductor are prepared and their charge–discharge characteristics are studied. The influence of homogenizing annealing and mechanical grinding on the discharge capacity and cyclic stability of the metal hydride (MH) electrodes is shown. The best electrochemical parameters are observed for powdered as-cast alloys.

Correction to: Electrode Materials Based on LaMgNi4–x Co x (0 ≤ x ≤ 1) Alloys

The third author’s name should be P. Ya. Lyutyy