Multiphase La 2 MgNi 9 alloys are synthesized by induction melting. The crystalline structures of all phases in the alloys are determined with X-ray diffraction. The La 2 MgNi 9 electrodes 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.