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A series of Mg2-xCrxNi alloy powder has been produced by combination of solid-state diffusion with mechanical grinding (MG). X-ray diffraction patterns show that the alloy powders have an amorphous structure and great increase in the specific surface. Electrochemical detection results indicate that the partial substitution of Mg by Cr in Mg2Ni alloy improves the cycle life of this alloy greatly, which gets up to 100 cycles at 200 mA/g mass discharge current, keeping its mass discharge capacity over 200 mA.h/g. In the meanwhile, partial replacement of Mg by Cr also increases the mass discharge capacity compared with Mg2Ni alloy. With the increasing of mass discharge current and content of Cr in Mg2-xCrxNi, the cycle life of the alloys are increased and the decay of mass discharge capacity slows down.
A series of Mg2-xCrxNi alloy powder has been produced by combination of solid-state diffusion with mechanical grinding (MG). X-ray diffraction patterns show that the alloy powders have an amorphous structure and great increase in the specific surface. Electrochemical detection results indicate that the partial substitution of Mg by Cr in Mg2Ni alloy improves the cycle life of this alloy greatly, which gets up to 100 cycles at 200 mA / g mass discharge current, keeping its mass discharge capacity over 200 mA.h / g. In with the increasing of mass discharge current and content of Cr in Mg2-xCrxNi, the cycle life of the alloys are increased and the decay of mass discharge capacity slows down.