MgNi2

MgNi2 is an intermetallic compound formed between magnesium (Mg) and nickel (Ni). It crystallizes in a hexagonal structure belonging to the MgCu2 (Laves phase) type. This compound is known for its interesting properties related to hydrogen storage and its use in electrode materials for batteries.

The synthesis of MgNi2 can be achieved through various methods, including arc melting, induction melting, and mechanical alloying. The purity and stoichiometry of the resulting compound are critical for its performance in specific applications. MgNi2 exhibits a high hydrogen storage capacity, making it a candidate for solid-state hydrogen storage technologies. When exposed to hydrogen gas under pressure and temperature, MgNi2 can absorb hydrogen to form a hydride phase, typically MgNi2H2. The release of hydrogen can be triggered by reducing the pressure or increasing the temperature.

In addition to hydrogen storage, MgNi2 has been investigated for its use as an anode material in nickel-metal hydride (NiMH) batteries. Its electrochemical properties contribute to the overall performance and cycle life of these batteries. Research continues to explore ways to optimize the structure and properties of MgNi2 and related alloys to enhance their efficiency and durability in various technological applications. The presence of both magnesium and nickel contributes to its unique characteristics.