Effect of magnetic field on the microstructure and electrochemical performance of rapidly quenched La 0.1 Nd 0.075 Mg 0.04 Ni 0.65 Co 0.12 alloy

Chen, Xiangrong; Wang, Haiyan; Zhu, Shuping; Li, Fangfang; Tang, Yougen; Liu, Zuming

doi:10.1016/j.jallcom.2014.08.002

Cited by 6 publications

(6 citation statements)

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“…Reproduced with permission. [ 191 ] Copyright 2014, Elaevier. e) Semilogarithmic curves of anodic current density versus time responses of alloys, f) electrochemical impedance spectroscopy spectra of alloy electrodes, and the surface of g) as‐cast alloy electrode and h) 25MFRQ alloy electrode after 100 cycles.…”

Section: Magnetic Field Effects On Electrocatalysis In Metal–air Batt...mentioning

confidence: 99%

“…[ 189 ] Chen et al. [ 191 ] verified that the applied magnetic field‐assisted method improves the electrochemical kinetics of La 0.1 Nd 0.075 Mg 0.04 Ni 0.65 Co 0.12 alloys by the combination of potential‐step measurements and electrochemical impedance spectroscopy tests. The results show that the anti‐pulverization and anti‐oxidation ability of alloys treated by a 0.8 T magnetic field is better than that of untreated alloys due to the increased grain boundaries during cycling (Figure 10e), and compact structure realized by magnetic field treatment reduce contact resistance and encourages charge transfer at alloy surface (Figure 10f), which is favorable for La 2 Ni 7 phase formation with inherent better electrochemical properties (Figure 10g,h).…”

Section: Magnetic Field Effects On Electrocatalysis In Metal–air Batt...mentioning

confidence: 99%

“…Electrochemical impedance spectroscopy, polarization curves, cyclic voltammetry and potential-step measurements are common methods of investigating the electrode (electrochemical) kinetics with and without a magnetic field. [190,191,197,198] When the electrode reaction is dominated by charge-transfer, the potential between the solution and the electrode can be altered by an applied magnetic field in some cases, and leading to the change in reaction mechanism. The electrode reaction process is usually controlled by charge transfer or diffusion, or synergistically controlled by both.…”

Section: Electrode Kineticsmentioning

confidence: 99%

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Magnetoelectric Coupling for Metal–Air Batteries

Wang

Zuo

et al. 2022

Adv Funct Materials

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Metal–air batteries have become one of the new potential sources of electrochemical energy due to the excellent electrochemical characteristics, environmental friendliness and cheap cost. Whereas, the commercialization of the metal–air batteries is still subject to the sluggish kinetics on air electrode and hydrogen evolution corrosion as well as dendrite growth of metal anode. Recently, the applied magnetic field, as a technology for transferring energy across physical space, receives more attention, can improve the performance of metal–air batteries by promoting mass transfer, accelerating charge transfer and enhancing electrocatalytic ability based on magnetohydrodynamic effect, Kelvin force effect, Hall effect, Spin selectivity effect, Maxwell stress effect and Magnetothermal effect. This review provides the recent progress in the research on the relative mechanism and characteristic of the magnetic field in the metal–air batteries.

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Section: Magnetic Field Effects On Electrocatalysis In Metal–air Batt...mentioning

confidence: 99%

Section: Magnetic Field Effects On Electrocatalysis In Metal–air Batt...mentioning

confidence: 99%

Section: Electrode Kineticsmentioning

confidence: 99%

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Magnetoelectric Coupling for Metal–Air Batteries

Wang

Zuo

et al. 2022

Adv Funct Materials

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“…The LaNi 5 alloy offers the possibility of total or partial substitution of La and Ni by other metals. Nickel can be substituted by transition elements such as Co, 8 Al, 9 Mn, 10 and Fe 11 . La is substituted by Mishmetal 12 .…”

Section: Introductionmentioning

confidence: 99%

Structural, morphological, and electrochemical properties of AB₅ hydrogen storage alloy by mechanical alloying

Dabaki

Khaldi

Elkedim

et al. 2021

Env Prog and Sustain Energy

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Mechanical alloying (MA) is one of the most promising methods in the development of intermetallic alloys and their scientific research. In this paper, elemental powder mixtures of Ca, Ni, and Mn of nominal composition CaNi5‐xMnx (with x = 0.3, 0.5, and 1) were elaborated by MA technique during different milling times (2–60 h). Structural, morphological, and electrochemical changes were investigated by X‐ray diffraction (XRD), scanning electron microscopy, and Ec‐Lab galvanostat, respectively. The XRD test indicated that each alloy has Ni and CaNi3 or CaNi5 phases. In addition, the particle size of the ground powders is decreased with increasing milling time. Furthermore, all alloys have a very high activation capacity, whereby the activation capacity can be fully realized during the first cycle. The results showed that the most significant value of discharge capacity for all alloys was 40 h.

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“…Ni-MH batteries have been extensively used in many fields due to their many advantages, such as low maintenance cost, light weight, configurable design, superb thermal performance, and high power [9,10]. Their excellent performance is due to the characteristics of their negative electrode active materials [11,12].…”

Section: Introductionmentioning

confidence: 99%

Phase structure and electrochemical characteristics of CaNi4.7Mn0.3 hydrogen storage alloy by mechanical alloying

Dabaki

Khaldi

Elkedim

et al. 2021

J Solid State Electrochem

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In this paper, we study systematically the effect of ball/powder weight ratio on the morphological, structural, and electrochemical properties of CaNi 4.7 Mn 0.3 powder alloy by mechanical milling. The CaNi 4.7 Mn 0.3 alloy powder is elaborated for an optimal milling time of 40 h with 8:1 and 12:1 ball/powder weight ratios. The X-ray diffraction (XRD) characterization shows that the CaNi 4.7 Mn 0.3 alloy powder is characterized by a nanocrystalline/amorphous crystallographic state and exhibits two major Ni and CaNi 3 phases irrespective of the ball/powder weight ratio. The CaNi 4.7 Mn 0.3 electrode activates rapidly in the first cycle regardless of the ball/powder weight ratio, and the best value of maximum discharge capacity is obtained for an 8:1 ratio (125 mAh g −1 ). The values of diffusion coefficient/mean grain size squared ratio D H a 2 , Nernst's potential E 0 , and exchange current density I 0 at the first activation cycle are the best for 8:1 ball/powder weight ratio. After activation, the discharge capacity decreases exponentially regardless of the ball/powder weight ratio. Indeed, the capacity loss and the degradation rate after 50th cycle are about 71%, 10.71 cycle −1 and 53%, 2.95 cycle −1 for 8:1 and 12:1, respectively. The evolution of the D H a 2 ratio, E 0 , and I 0 during the cycling is in good agreement with that of the discharge capacity. The highest values of the diffusion coefficient D H , Nernst's potential E 0 , and exchange current density I 0 after 50th cycle are observed for 8:1 ball/powder weight ratio. KeywordsCaNi 4.7 Mn 0.3 hydrogen storage alloy • Mechanical alloying • Morphological and structural properties • Electrochemical properties

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Effect of magnetic field on the microstructure and electrochemical performance of rapidly quenched La 0.1 Nd 0.075 Mg 0.04 Ni 0.65 Co 0.12 alloy

Cited by 6 publications

References 51 publications

Magnetoelectric Coupling for Metal–Air Batteries

Magnetoelectric Coupling for Metal–Air Batteries

Structural, morphological, and electrochemical properties of AB₅ hydrogen storage alloy by mechanical alloying

Phase structure and electrochemical characteristics of CaNi4.7Mn0.3 hydrogen storage alloy by mechanical alloying

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Effect of magnetic field on the microstructure and electrochemical performance of rapidly quenched La 0.1 Nd 0.075 Mg 0.04 Ni 0.65 Co 0.12 alloy

Cited by 6 publications

References 51 publications

Magnetoelectric Coupling for Metal–Air Batteries

Magnetoelectric Coupling for Metal–Air Batteries

Structural, morphological, and electrochemical properties of AB5 hydrogen storage alloy by mechanical alloying

Phase structure and electrochemical characteristics of CaNi4.7Mn0.3 hydrogen storage alloy by mechanical alloying

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Structural, morphological, and electrochemical properties of AB₅ hydrogen storage alloy by mechanical alloying