Electrochemical hydrogen storage properties of a non-equilibrium Ti2Ni alloy

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

“…For example, S C has an extremely high maximum discharge capacity of 844.6 mAh/g, which is much higher than that of conventional hydrogen storage alloys [1][2][3][4][5][6]. The maximum discharge capacity of S S and S N are 669.8 and 367.0 mAh/g, respectively.…”

“…In the past few decades, extensive studies on hydrogen storage alloys (HMs) as anode materials of nickel-metal hydride (Ni-MH) batteries have been reported as being used in portable electronics due to their high specific capacity, good durability, and environmental friendliness [1][2][3][4][5][6]. Up to now, many kinds of metal hydrides have been developed; for instance, Mg-based alloys exhibit a maximum discharge capacity above 500 mAh/g, but the poor cycling ability limits widespread practical application [7].…”

The Current Status of Hydrogen Storage Alloy Development for Electrochemical Applications

“…Without the assistance of TiNi phase, the hydrogen stored in Ti 2 Ni phase cannot be released due to the stronger meta-hydrogen bond strength. However, the cycle stability of such a biphasic system suffers due to the corrosion and oxidation of Ti 2 Ni [ 159 , 162 ].…”

“…Annealing treatment was then proposed in addition to sintering and ball milling, which results in a thicker oxide layer on the surface of amorphous Ti 2 Ni and improves both capacity and charge retention of the alloy [ 167 ]. In order to increase the capacity, Zhao et al developed another fabrication method for Ti 2 Ni: induction melting, ball milling, and annealing [ 162 ]. The product is amorphous and nanocrystalline in nature and demonstrates reasonable capacity and good cycle stability; however, the highest reported capacity of 363 mAh·g −1 for Ti 2 Ni MH alloy is obtained at higher temperatures while cycle stability suffers.…”

Promising electrochemical hydrogen storage properties of thick Mg–Pd films obtained by insertion of thin Ti interlayers

“…Therefore, numerous hydrogen storage alloys have been developed as the negative electrodes for Ni-MH batteries, including AB 5 -type rare earth-based alloys, 9-13 AB 3 -or A 2 B 7 -type rare earth-magnesiumbased alloys 14,15 and Ti-Ni-based alloys. 16,17 However, further increasing the energy densities of Ni-MH batteries remains challenging, due to the disadvantages of dominating rare earth based negative electrodes used nowadays. These drawbacks include limited discharge capacity, high price, unsatisfying charge-discharge cycles and poor discharge properties at high current density, which severely impede their further applications in Ni-MH batteries.…”