Improvement in high-temperature performance of Co-free high-Fe AB5-type hydrogen storage alloys

Chao, Dongliang; Zhong, Cheng; Ma, Zhenqiang; Yang, Fei; Wu, Yucheng; Zhu, Ding; Wu, Chien-Huei; Chen, Yungui

doi:10.1016/j.ijhydene.2012.05.147

Cited by 34 publications

(4 citation statements)

References 29 publications

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“…However, discharge capacity was degraded. 39 Other research works on AB 5 alloy are summarized in the Tables 2-4. Although, these exhibit good long-term cyclic performance, their equivalent gravimetric hydrogen storage capacity is lower than the current US DOE targets for mobile applications.…”

Section: Ab 5 Alloymentioning

confidence: 99%

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Electrochemical hydrogen storage: Achievements, emerging trends, and perspectives

Yadav

Oberoi

Mittal

2022

Intl J of Energy Research

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Hydrogen being abundant, eco-friendly, is a promising alternative energy source to fossil fuels. Its practical application is limited because of difficulty in storage due to low energy density and safety issues. Solid-state electrochemical hydrogen storage is a promising method among several approaches of hydrogen storage to meet the U.S. Department of Energy's (DOE) targets. Till 2020, no hydrogen storage material has achieved targets due to lack of proper strategies. In view of meeting targets decided by U.S. DOE, a detailed review of

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Section: Ab 5 Alloymentioning

confidence: 99%

“…by replacing Co content with Fe. However, discharge capacity was degraded 39 . Other research works on AB 5 alloy are summarized in the Tables 2‐4.…”

Section: Achievements In Electrochemical Hydrogen Storage Materialsmentioning

confidence: 99%

Electrochemical hydrogen storage: Achievements, emerging trends, and perspectives

Yadav

Oberoi

Mittal

2022

Intl J of Energy Research

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“…In the Tafel polarization curves of all the samples (Figure 4(a)), there is a clear increase in the anodic current density to a limiting current density, , beyond which the current decreases. This is indicative of the oxidation of the electrode surface, with the resulting oxidation product inhibiting the penetration of hydrogen atoms [14,15]. The decrease in anodic charge current density with repeated cycling also suggests that charging becomes more difficult, and, hence, may be regarded as the critical passivation current density, which is determined by the diffusion of hydrogen in the bulk electrode during anodic polarization [16].…”

Section: Dynamic Properties Of Electrode Materials Figure 4(a)mentioning

confidence: 99%

Electrochemical Properties of La₂Mg₁₇/Ni Electrodes Prepared via TiF₃-Catalysed Mechanical Milling

Liu

Zhang

et al. 2015

Advances in Materials Science and Engineering

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In order to improve the hydrogen storage capacity of conventional La2Mg17electrode alloys, a nanocrystalline/amorphous-structured La2Mg17-Ni composite material was produced by high energy ball milling in the presence of TiF3. Subsequent analysis of the discharge/charge cycle performances of this electrode material revealed that its cycle stability and electrochemical capacity were greatly improved, with the latter reaching a maximum value of 787.07 mAh/g with optimisation of the TiF3addition. Moreover, a remarkable enhancement in the reversibility of electrochemical reactions on the material’s surface was also observed. Hydrogen diffusion coefficients for the material were calculated by means of a potential step method, confirming that TiF3markedly improves the long-range diffusion of hydrogen within the material.

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“…Therefore, no prominent solution has appeared to improve the highrate properties and retain the electrochemical performance at relatively high temperatures (45 °C∼60 °C). 15,16 In the past decade, in an innovative approach, metal oxide materials were also investigated as a hydrogen storage material for these batteries. Esaka and co-workers, in a pioneering work, examined ACe 0.95 M 0.05 O 3−δ (A = Ba, Sr; M = Yb, Tm, Pr, Tb) perovskite-type oxides for hydrogen storage properties in an alkaline medium.…”

mentioning

confidence: 99%

High Capacity, Rate-Capability, and Power Delivery at High-Temperature by an Oxygen-Deficient Perovskite Oxide as Proton Insertion Anodes for Energy Storage Devices

Bhardwaj

Bae

Kim

et al. 2021

J. Electrochem. Soc.

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Ni/MH batteries have undergone constant development over time to fulfill emerging demands; however, poor high-temperature performance limits their widespread applicability as a cheap and robust energy storage system. Herein, Sm 1-x Sr x CoO 3−δ (x = 0, 0.5, 1) perovskite oxides are investigated as proton insertion anodes for batteries. The oxygen-deficient Sm 0.5 Sr 0.5 CoO 3-δ (SSC) unveils maximum reversible discharge capacity of 182 mAh g −1 at 25 °C, the highest for oxide materials investigated so far. It also increases with temperature to 240 mAh g −1 at 60 °C. Partial substitution of samarium for acceptor dopant strontium is found to induce lattice expansion and improve cobalt-ion reducibility to facilitate higher hydrogen storage. The kinetic properties viz. exchange current density, hydrogen diffusivity, the activation energies of the charge-transfer process, and hydrogen diffusion are scrutinized. The complex impedance analysis indicates a gradual reduction of bulk (R b ) and charge-transfer (R ct ) polarization with temperature. Moreover, the SSC exhibits good cyclability, low self-discharge rates, satisfactory rate-capability, good power delivery, and a high coulombic efficiency even at elevated temperatures to be a potentially suitable anode for Ni/Oxide or proton rechargeable batteries.

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Improvement in high-temperature performance of Co-free high-Fe AB5-type hydrogen storage alloys

Cited by 34 publications

References 29 publications

Electrochemical hydrogen storage: Achievements, emerging trends, and perspectives

Electrochemical hydrogen storage: Achievements, emerging trends, and perspectives

Electrochemical Properties of La₂Mg₁₇/Ni Electrodes Prepared via TiF₃-Catalysed Mechanical Milling

High Capacity, Rate-Capability, and Power Delivery at High-Temperature by an Oxygen-Deficient Perovskite Oxide as Proton Insertion Anodes for Energy Storage Devices

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Improvement in high-temperature performance of Co-free high-Fe AB5-type hydrogen storage alloys

Cited by 34 publications

References 29 publications

Electrochemical hydrogen storage: Achievements, emerging trends, and perspectives

Electrochemical hydrogen storage: Achievements, emerging trends, and perspectives

Electrochemical Properties of La2Mg17/Ni Electrodes Prepared via TiF3-Catalysed Mechanical Milling

High Capacity, Rate-Capability, and Power Delivery at High-Temperature by an Oxygen-Deficient Perovskite Oxide as Proton Insertion Anodes for Energy Storage Devices

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Electrochemical Properties of La₂Mg₁₇/Ni Electrodes Prepared via TiF₃-Catalysed Mechanical Milling