Composites consisting of Mg2Ni and ZrV0.5Ni1.5 were synthesized by mechanical alloying(MA) and Spark Plasma Sintering(SPS). Mg2Ni, a major component having good hydrogen storage properties, and ZrV0.5Ni1.5, a minor component having good corrosion resistance, were selected. The composites were identified using X-ray diffraction (XRD). The electrochemical behavior was measured with a Maccor series 4000. It was observed that the surface of the Mg2Ni electrode was modified by ZrV0.5Ni1.5 secondary phase. As a result, the cycle life of the Mg2Ni composite was improved.