Mn含量对Mg2Ni型合金相形成及放电性能的影响

Effect of Mn Content on the Phase Formation and Discharge Capacity of Mg2Ni-typed Alloy Made by Sintered and Subsequent Ball Milling

摘要:

采用按比例混合合金粉末压制成圆柱试样，然后用低温烧结和随后机械球磨的方法制备了非晶态的Mg2Ni型合金。研究了烧结和球磨对不同Mn含量的Mg2Ni型合金的相形成过程及电化学性能的影响。实验表明：在Mg2Ni中采用第三组元Mn对Mg进行适量的替代后，通过烧结及球磨方法可以获得均匀的非晶相；微量替代可有效地提高其放电容量：随替代量的增加，合金最大放电容量和高速放电能力降低，而充放电循环稳定性提高。

Abstract:

Amorphous Mg2Ni-based alloy powder was prepared by sintering and subsequent ball milling with Ni. The effects of substitution of Mn for Mg on phase formation and electrochemical discharge performance of Mg2Ni-typed alloys were studied. The results show that partial substitution of Mn for Mg in Mg2-xMnxNi (x=0.1,0.2,0.3,0.4) alloys can obtain homogeneous amorphous alloys and can increase the discharge capacity effectively compared with Mg2Ni alloy. As the content of Mn substitution increases, the maximum discharge capacity and rate discharge capability of Mg2Ni-typed alloy decline and the cycling durability upgrades.