Fabrication and evaluation of hydriding/dehydriding behaviors of Mg–10 wt.%Ni alloys by rotation-cylinder method

Electrochemical Hydrogen Storage Behaviors of Ultrafine Amorphous Co−B Alloy Particles

“…Hydrogen storage alloys (HMs) have been actively investigated as a high capacity negative material of nickel−metal hydride batteries for use in various electronic devices and hybrid low-emission vehicles. − In the past few decades, many metal hydrides, such as AB 5 -type rare-earth metal alloys, − AB 2 -type Laves phase alloys, , A 2 B-type Mg-based alloys, , and AB-type intermetallic compounds, , have been explored, and a large amount of work, such as the optimization of alloy composition − and surface modifications, − has been done to improve the electrochemical capacity and high rate capability of these materials. Though some of the Mg-based alloys have very high capacities of ≥600 mAh/g, their cycling abilities and poor dynamics are insufficient for practical applications. , At the present state of the art, the commercially used MHs usually have a reversible capacity of ∼300 mAh/g, , and therefore, the search for new hydrogen storage materials with higher energy density has been continuously carried out in recent years.…”

“…Though some of the Mg-based alloys have very high capacities of g600 mAh/g, their cycling abilities and poor dynamics are insufficient for practical applications. 24,25 At the present state of the art, the commercially used MHs usually have a reversible capacity of ∼300 mAh/g, 26,27 and therefore, the search for new hydrogen storage materials with higher energy density has been continuously carried out in recent years.…”

Preparation of the Mg2Ni compound from ultrafine particles and its hydrogen storage properties

“…For preparation of the Mg-based hydrogen storage alloys, several methods such as conventional melting [1], mechanical alloying (MA) [2,3], combustion synthesis [4], melt spinning [5], the replacement-diffusion method [6] and the rotation-cylinder method [7] have been developed. Because of the large difference in the vapour pressure and melting point between Mg and Ni, it remains difficult to prepare the pure Mg 2 Ni compound by the conventional melting method.…”

Microstructure and electrochemical hydrogenation/dehydrogenation performance of melt-spun La-doped Mg2Ni alloys

“…Recently, some reversible structural changes in dehydriding were reported in the Mg-Ag [20] and Mg-In [21,22] binary alloy systems to reduce the thermodynamic stabilities of MgH 2 . On the other hand, new synthetic methods are always used to ameliorate the internal microstructures and the microscopic phase compositions of the alloys [23][24][25][26][27]. Specific architectures are designed to obtain desired properties of Mg-based materials.…”