A series of Mg_(2-x)Cr_xNi alloy powder has been produced by combination ofsolid-state diffusion with mechanical grinding (MG). X-ray diffraction patterns show that the alloypowders have an amorphous structure and gre...A series of Mg_(2-x)Cr_xNi alloy powder has been produced by combination ofsolid-state diffusion with mechanical grinding (MG). X-ray diffraction patterns show that the alloypowders have an amorphous structure and great increase in the specific surface. Electrochemicaldetection results indicate that the partial substitution of Mg by Cr in Mg_2Ni alloy improves thecycle 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 byCr also increases the mass discharge capacity compared with Mg_2Ni alloy. With the increasing ofmass discharge current and content of Cr in Mg_(2-x)Cr_xNi, the cycle life of the alloys areincreased and the decay of mass discharge capacity slows down.展开更多
文摘A series of Mg_(2-x)Cr_xNi alloy powder has been produced by combination ofsolid-state diffusion with mechanical grinding (MG). X-ray diffraction patterns show that the alloypowders have an amorphous structure and great increase in the specific surface. Electrochemicaldetection results indicate that the partial substitution of Mg by Cr in Mg_2Ni alloy improves thecycle 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 byCr also increases the mass discharge capacity compared with Mg_2Ni alloy. With the increasing ofmass discharge current and content of Cr in Mg_(2-x)Cr_xNi, the cycle life of the alloys areincreased and the decay of mass discharge capacity slows down.
