Temperature performance of AB5 hydrogen storage alloy for Ni-MH batteries

Téliz, Erika; Sebastian, C.S.; Zinola, Fernando; Díaz, Verónica

doi:10.1016/j.ijhydene.2016.04.015

Cited by 24 publications

(9 citation statements)

References 32 publications

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“…The discharge capacities obtained at different temperatures are plotted in Figure 9. Mo-addition in the Mm-based superlattice alloy improved the low-temperature performance of the Ni/MH cells, which is also observed in cells with AB 2 [23], AB 5 [24,25], and La-based superlattice [26,27] MH alloys. While Cell Mo3 gave the highest discharge capacity at −10 and −20 °C, Cell Mo5 was the champion at −30 and −40 °C.…”

Section: Cell Performancementioning

confidence: 59%

Properties of Nickel Metal Hydride Battery Using Molybdenum-added Superlattice Metal Hydride Alloy

Kim¹

2018

Mater. Sci. Eng. Adv. Res

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The performance of sealed cells comprising of a series of superlattice metal hydride (MH) alloys with compositions of Mm 0.83 Mg 0.17 Ni 2.94-x Al 0.17 Co 0.20 Mo x (Mm is a mixture of La, Pr, and Nd, x = 0.00, 0.05, 0.10, 0.15, and 0.20) was evaluated and compared against other substitutional elements, such as Fe, Mn, and Co. The capacities of cells with Mo-containing alloys are higher than the ones using Mo-free alloy due to the former's higher active material utilization in positive electrodes. Cells with alloy of x = 0.10 showed the highest capacity and high-rate dischargeability, the best low-temperature (−10 and −20 °C), and the longest cycle performance (C-rates charge and discharge). This level of Mo (x = 0.10) is effective in protecting the alloy surface from oxidation. The main failure mechanism of the sudden capacity drop for cells in this study is the venting of gas/ electrolyte mixture from the build-up of internal pressure; this is caused by a dense surface oxide layer formed on the MH alloy blocking the path for gas-recombination during overcharge.

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Section: Cell Performancementioning

confidence: 59%

Properties of Nickel Metal Hydride Battery Using Molybdenum-added Superlattice Metal Hydride Alloy

Kim¹

2018

Mater. Sci. Eng. Adv. Res

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“…Better findings may be obtained by rising the electrolyte concentration or augmenting temperature. Within this framework, Teliz et al 33 showed that the change of…”

Section: Redox Parameters Of the Negative Electrode Znfe 2 Omentioning

confidence: 99%

Electrochemical behavior of a spinel zinc ferrite alloy obtained by a simple sol‐gel route for Ni‐MH battery applications

Zayani

Azizi

El‐Nasser

et al. 2020

Intl J of Energy Research

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Summary The hydrogen storage properties of zinc ferrite spinel (ZnFe2O4) alloy were studied, in this work. This alloy, formed applying the sol‐gel technique, was employed as anode in Ni‐MH accumulators. X‐ray diffractogram analysis showed the appearance of the compound spinel with cubic structure. In fact, the crystallite size, specified by the TEM technique, was equal to 30 nm. The hydrogen storage properties of zinc ferrite spinel alloy were examined applying various electromechanical methods (chronopotentiometry, cyclic voltammetry, and chronoamperometry) at the C/10 rate and at room temperature. The maximum discharge capacity value was almost equal to 145 mAh/g. After 100 cycles, a good cycling stability was attained and correlation between the (DH/a2) ratio and the discharge capacity as noticed. The electrolyte/ZnFe2O4 anode interface prior to and following activation was studied utilizing electrochemical impedance spectroscopy.

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“…The A site in AB 5 represents one or more strongly hydride-forming elements while B site represents one or more weakly hydride-forming elements, and usually helps to dissociate the H 2 molecules on the surface of alloy material [58]. The A site is usually occupied by La, Ca or rare earth element while Ni, Cu, Co, Pt or Fe fill the B site [59]. AB 5 alloys are known to have a CuCa 5 -type hexagonal crystal structure which normally belongs to space group P6/mmm (#191) [60,61].…”

Section: Structural Characteristics Of Mechanically Milled Ab 5 -Type...mentioning

confidence: 99%

“…Of 37 voids available within LaNi 5 lattice structure, only 6 voids are occupied by hydrogen atoms to form LaNi 5 H 6 ternary hydride [70]. It is notable that the hysteresis effect in AB 5 -type alloy is relatively small as compared to other low temperature systems with a large and distinct miscibility gap [59]. Mechanical alloying has also been employed to synthesize AB 5 alloys [25,62,67,71].…”

Section: Hydrogen Absorption Behaviour Of Mechanically Alloyed Ab 5 -...mentioning

confidence: 99%

A Comprehensive Review on Hydrogen Absorption Behaviour of Metal Alloys Prepared through Mechanical Alloying

Somo

Maponya

Davids

et al. 2020

Metals

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Hydride-forming alloys are currently considered reliable and suitable hydrogen storage materials because of their relatively high volumetric densities, and reversible H2 absorption/desorption kinetics, with high storage capacity. Nonetheless, their practical use is obstructed by several factors, including deterioration and slow hydrogen absorption/desorption kinetics resulting from the surface chemical action of gas impurities. Lately, common strategies, such as spark plasma sintering, mechanical alloying, melt spinning, surface modification and alloying with other elements have been exploited, in order to overcome kinetic barriers. Through these techniques, improvements in hydriding kinetics has been achieved, however, it is still far from that required in practical application. In this review, we provide a critical overview on the effect of mechanical alloying of various metal hydrides (MHs), ranging from binary hydrides (CaH2, MgH2, etc) to ternary hydrides (examples being Ti-Mn-N and Ca-La-Mg-based systems), that are used in solid-state hydrogen storage, while we also deliver comparative study on how the aforementioned alloy preparation techniques affect H2 absorption/desorption kinetics of different MHs. Comparisons have been made on the resultant material phases attained by mechanical alloying with those of melt spinning and spark plasma sintering techniques. The reaction mechanism, surface modification techniques and hydrogen storage properties of these various MHs were discussed in detail. We also discussed the remaining challenges and proposed some suggestions to the emerging research of MHs. Based on the findings obtained in this review, the combination of two or more compatible techniques, e.g., synthesis of metal alloy materials through mechanical alloying followed by surface modification (metal deposition, metal-metal co-deposition or fluorination), may provide better hydriding kinetics.

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Temperature performance of AB5 hydrogen storage alloy for Ni-MH batteries

Cited by 24 publications

References 32 publications

Properties of Nickel Metal Hydride Battery Using Molybdenum-added Superlattice Metal Hydride Alloy

Properties of Nickel Metal Hydride Battery Using Molybdenum-added Superlattice Metal Hydride Alloy

Electrochemical behavior of a spinel zinc ferrite alloy obtained by a simple sol‐gel route for Ni‐MH battery applications

A Comprehensive Review on Hydrogen Absorption Behaviour of Metal Alloys Prepared through Mechanical Alloying

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