Electrochemical study of cobalt-free AB5-type hydrogen storage alloys

Khaldi, Chokri

doi:10.1016/s0360-3199(03)00157-5

Cited by 81 publications

(23 citation statements)

References 7 publications

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“…5 the effective diffusion coefficient of hydrogen D H is almost independent of cycle number with an average value of 8.05$10 À11 cm 2 s À1 . This value is very close to the diffusion coefficient values of hydrogen in the other LaNi 5 -type alloys, which are in the range of 1$10 À11 e1$10 À10 cm 2 s À1 [13,18,19]. It is very important to restrain the decrease of the discharge capacity even at the high discharge current density for practical application of metal hydride electrode.…”

Section: Resultssupporting

confidence: 76%

“…It was shown, for instance, that the alloys where the cobalt is partially substituted by iron, allow to keep a good cyclic stability [12]. However, the total replacement of cobalt by iron in LaNi 3.55 Mn 0.4 Al 0.3 Co 0.75 alloy leads to a decrease in the maximum capacity but improves the cycle lifetime of the alloy [13]. The cobalt free La 0.5 Ce 0.4 Ti 0.1 Ni 3.77 Mn 0.36 Al 0.27 (CuFeCr) 0.6 alloy showed very good cycling stability, although the initial capacity (266 mA h g À1 ) was lower than that of the cobalt-containing alloy [14].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical studies of LaNi4.3Co0.4Al0.3 hydrogen storage alloy

Giza

2013

Intermetallics

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Section: Resultssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Electrochemical studies of LaNi4.3Co0.4Al0.3 hydrogen storage alloy

Giza

2013

Intermetallics

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“…AB-type ZrNi hydrogen storage alloy has the theoretical capacity of 536 mAh g ¹1 , 9) which is higher than that of commercial AB 5 -or AB 3 -type rare earth-based alloys, 10,11) so the ZrNi alloy is a promising negative electrode active material. 1214) Recently, we have developed new AB-type ZrTiNbNi quaternary hydrogen storage alloys, and the electrochemical capacities of the Zr 0.58 Ti 0.4 Nb 0.02 Ni negative electrode at 333 and 303 K were 384 and 335 mAh g ¹1 , 15) respectively.…”

Section: Introductionmentioning

confidence: 97%

Effect on Electrochemical Properties of Phases in AB-Type Zr–Ti–Nb–Ni Alloys as Nickel-Metal Hydride Batteries

Matsuyama¹,

Takito²,

Kozuka³

et al. 2019

Mater. Trans.

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AB-type ZrTiNbNi alloys are good candidates as the negative electrode for Ni-metal hydride (MH) batteries because they have high discharge capacity around 330 mAh g ¹1 at 303 K. The Zr 0.49 Ti 0.5 Nb 0.01 Ni alloy consists of two phases, the primary-phase with B33-type orthorhombic structure and the secondary-phase with B2-type cubic structure. To compare electrochemical properties of each phase with the mother alloy, we synthesized the primary-phase and secondary phase alloys with compositions of Zr 0.54 Ti 0.47 Nb 0.01 Ni 0.98 and Zr 0.47 Ti 0.52 Nb 0.01 Ni, respectively. The discharge capacity was examined at 25 mA g ¹1 and 303 K, showing that the primary-phase alloy has the highest value of 362 mAh g ¹1 than the mother alloy (335 mAh g ¹1 ) and the secondary-phase alloy (253 mAh g ¹1 ). For cycle performance, all alloys were excellent (½95%) at 100 mA g ¹1 and 303 K. For high-rate dischargeability, the secondary-phase alloy was the best, probably because the stability of hydride for the secondary-phase alloy was lower than that for the mother and the primary-phase alloy.

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“…The performance of Ni‐MH battery is drastically determined by the active anode materials . The intrinsic problems of the most commercial anode electrode material such as the low capacity of AB 5 and the poor activation of AB 2 hydrogen storage alloys are significant impact on the hydrogen battery application . Therefore, it is interesting to develop new anode materials for the Ni‐MH rechargeable batteries.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] The intrinsic problems of the most commercial anode electrode material such as the low capacity of AB 5 and the poor activation of AB 2 hydrogen storage alloys are significant impact on the hydrogen battery application. [5][6][7][8] Therefore, it is interesting to develop new anode materials for the Ni-MH rechargeable batteries. Nowadays, many investigations have reported that the perovskite oxides are the most promising negative electrode materials for hydrogen batteries because of their higher capacity and lower cost compared with the traditional hydrogen storage alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries

et al. 2018

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Summary To obtain a novel negative electrode for nickel‐metal hydride rechargeable batteries, perovskite‐type oxide LaGaO3 was synthesized by the sol‐gel method. The electrochemical properties of the oxide were systematically investigated at different temperatures by using galvanostatic, chronoamperometric, and potentiodynamic polarization methods. We have selected 298, 313, and 328 K as room, intermediate, and high temperatures, respectively. The galvanostatic results showed that the discharge capacity of the oxide LaGaO3 increased with the temperature elevating during the first 3 cycles. This oxide has the highest discharge capacity of about 220 mAh g−1at high temperature. For room and intermediate temperatures, we observed that the discharge capacity maintains a constant about of 5 and 13 mAh g−1 for 298 and 313 K, respectively, when the number of cycles is increased. The electrochemical kinetic analysis indicates that the exchange current density and the hydrogen diffusion coefficient of the oxide LaGaO3 increase with the rise in temperature. The apparent activation energy (Ea) for hydrogen diffusion process and the activation energy (ΔrH*) for charge‐transfer reaction of the investigated oxide electrode LaGaO3 are estimated. The calculated values of the Ea and ΔrH* are 117.46 and 105 kJ mol−1, respectively. The above experimental results indicated that the kinetic properties of the working electrode have been significantly improved by the elevating of the temperature. The best electrochemical performance (faster activation and highest maximum capacity) of the oxide electrode is obtained at high temperature (328 K).

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Electrochemical study of cobalt-free AB5-type hydrogen storage alloys

Cited by 81 publications

References 7 publications

Electrochemical studies of LaNi4.3Co0.4Al0.3 hydrogen storage alloy

Electrochemical studies of LaNi4.3Co0.4Al0.3 hydrogen storage alloy

Effect on Electrochemical Properties of Phases in AB-Type Zr–Ti–Nb–Ni Alloys as Nickel-Metal Hydride Batteries

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries

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Electrochemical study of cobalt-free AB5-type hydrogen storage alloys

Cited by 81 publications

References 7 publications

Electrochemical studies of LaNi4.3Co0.4Al0.3 hydrogen storage alloy

Electrochemical studies of LaNi4.3Co0.4Al0.3 hydrogen storage alloy

Effect on Electrochemical Properties of Phases in AB-Type Zr–Ti–Nb–Ni Alloys as Nickel-Metal Hydride Batteries

Effect of temperature on behavior of perovskite-type oxide LaGaO3 used as a novel anode material for Ni-MH secondary batteries

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Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries