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<p>Mechanical ball milling of Mg<sub>2</sub>Ni/Mg alloys with transition metal (Ni, Co, Cu) powders resulted in the formation of nanostructured or amorphous materials. Negative electrodes based on these synthesized composites exhibited improved electrochemical charge-discharge properties. Specifically, the electrode containing the Mg<sub>2</sub>Ni + Ni composite achieved a&#xa0;high initial discharge capacity of 810 mAh/g. Composites with cobalt and copper showed lower capacity than with the nickel composite, and their cyclic stability was somewhat better. During cycling, the electrodes remained amorphous. However, after a&#xa0;certain time of operation, they began to show signs of degradation, particularly the formation of magnesium hydroxide.</p>

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Electrochemical charge-discharge characteristics of composites based on Mg2Ni/Mg and transition metals

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • Yu. V. Verbovytskyy,
  • I. Yu. Zavaliy,
  • T. M. Zasadnyy

摘要

Mechanical ball milling of Mg2Ni/Mg alloys with transition metal (Ni, Co, Cu) powders resulted in the formation of nanostructured or amorphous materials. Negative electrodes based on these synthesized composites exhibited improved electrochemical charge-discharge properties. Specifically, the electrode containing the Mg2Ni + Ni composite achieved a high initial discharge capacity of 810 mAh/g. Composites with cobalt and copper showed lower capacity than with the nickel composite, and their cyclic stability was somewhat better. During cycling, the electrodes remained amorphous. However, after a certain time of operation, they began to show signs of degradation, particularly the formation of magnesium hydroxide.