Dual-tuning effects of In, Al, and Ti on the thermodynamics and kinetics of Mg85In5Al5Ti5 alloy synthesized by plasma milling

Cao, Zhijie; Ouyang, Liuzhang; Wu, Yanting; Wang, Hui; Liu, Jiangwen; Fang, Fang; Sun, Dalin; Zhang, Qingan; Zhu, Min

doi:10.1016/j.jallcom.2014.10.200

Cited by 135 publications

(42 citation statements)

References 41 publications

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“…They claimed that addition of Ti and in-situ synthesized MgF 2 improved the kinetics and the introduction of In as well as Al imparted enhanced thermodynamics to the Mg 85 In 5 Al 5 Ti 5 system42. In their study, the dehydrogenation enthalpy change and activation energy of this new system were 65.2 kJ/(mol H 2 ) and 125.2 kJ/mol, respectively.…”

mentioning

confidence: 96%

Metallic glassy Zr70Ni20Pd10 powders for improving the hydrogenation/dehydrogenation behavior of MgH2

El‐Eskandarany

2016

Sci Rep

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Because of its low density, storage of hydrogen in the gaseous and liquids states possess technical and economic challenges. One practical solution for utilizing hydrogen in vehicles with proton-exchange fuel cells membranes is storing hydrogen in metal hydrides. Magnesium hydride (MgH2) remains the best hydrogen storage material due to its high hydrogen capacity and low cost of production. Due to its high activation energy and poor hydrogen sorption/desorption kinetics at moderate temperatures, the pure form of MgH2 is usually mechanically treated by high-energy ball mills and catalyzed with different types of catalysts. These steps are necessary for destabilizing MgH2 to enhance its kinetics behaviors. In the present work, we used a small mole fractions (5 wt.%) of metallic glassy of Zr70Ni20Pd10 powders as a new enhancement agent to improve its hydrogenation/dehydrogenation behaviors of MgH2. This short-range ordered material led to lower the decomposition temperature of MgH2 and its activation energy by about 121 °C and 51 kJ/mol, respectively. Complete hydrogenation/dehydrogenation processes were successfully achieved to charge/discharge about 6 wt.%H2 at 100 °C/200 °C within 1.18 min/3.8 min, respectively. In addition, this new nanocomposite system shows high performance of achieving continuous 100 hydrogen charging/discharging cycles without degradation.

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mentioning

confidence: 96%

Metallic glassy Zr70Ni20Pd10 powders for improving the hydrogenation/dehydrogenation behavior of MgH2

El‐Eskandarany

2016

Sci Rep

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“…Одним із шляхів вирішення проблеми пониження термо-динамічної стабільности MgH 2 , який застосовується дослідниками в останні роки [9,[15][16][17][18][19], є використання механічних стопів (МС), що уявляють собою тверді розчини в маґнії одного або декількох металів, спроможних знизити ентальпію утворення/розкладу Mg(Me)H 2 . Експериментальні дослідження вказують на те, що тер-модинамічна стабільність такого гідриду твердого розчину зале-жить від способу і умов одержання [9,[15][16][17][18][19]. Більшість дослідни-ків використовують способи, які уможливлюють запобігти неґати-вному впливу поверхневого шару оксиду-гідроксиду на процеси дисоціятивної хемосорбції і рекомбінації водню і зменшити розмір зерен для скорочення його дифузійних шляхів в твердій матриці.…”

Section: вступunclassified

Influence of Admixtures of Si, Fe, Ti on Temperature and Kinetics of Dissociation of MgH$_2$ Obtained by Reactive Mechanical Alloyage

Ershova¹,

Dobrovolsky²,

Solonin³

et al. 2018

Metallofiz. Noveishie Tekhnol.

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Синтезовано механічний стоп-композит МС (Mg 5% ваг. Si 5% вaг. Fe 2% вaг. Ti) методою реактивного механічного стоплення (РМС). При ти-ску водню у 0,1 МПа із застосуванням термодесорбційної спектроскопії досліджено водневу місткість, термічну стійкість, кінетику десорбції во-дню з гідридної фази MgH 2 , одержаної МС. Встановлено, що додавання до маґнію Si, Ti, Fe приводить до істотного поліпшення кінетики десорбції водню з одержаної РМС гідридної фази MgH 2 . Не встановлено пониження термодинамічної стабільности MgH 2 за рахунок вказаного леґування. Пі-сля реактивного помелу протягом 20 год. воднева місткість механічного стопу виявилася рівною 5,6% ваг., а після перших циклів сорбції-десорбції водню -5,1% ваг.Ключові слова: кінетика сорбції-десорбції, воднесорбційні властивості, механічний стоп, термічна стійкість, термодесорбційна спектроскопія.The mechanical alloy MА (Mg 5% wt. Si 5% wt. Fe 2% wt. Ti) is synthesized by the method of reactive mechanical alloyage (RMA). At hydrogen pressure of 0.1 MPa, the hydrogen capacity, thermal stability, and kinetics of hydrogen desorption from the MgH 2 hydride phase obtained by means of the MA are studied with the use of thermal desorption spectroscopy. As de-

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“…So far, a variety of chemical elements, such as In, [5][6][7] Ni, [8][9][10] Zr, 11,12 Ag, 13 Al, 14,15 Ti, 16,17 rare earth (RE) elements 18 and their composites, [19][20][21][22][23] have been exploited as the alloying elements for the Mg-based alloys. Among them, adding RE elements attracts extensive interest for the Mg-based alloys due to its excellent improvement of the hydriding/dehydriding rate, which may be a better choice to meet the requirements of future hydrogen energy storage systems.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, dualtuning effects of the thermodynamics and kinetics for Mgbased materials is one of the key issues for hydrogen economy and hydrogen storage materials. [35][36][37] Cao et al 35 found that the Mg 85 In 5 Al 5 Ti 5 alloy displays both enhanced dehydriding kinetics and thermodynamics, which is prepared by plasma milling (Pmilling). 36 The addition of In into Mg 2 Ni not only greatly enhanced the dehydriding kinetics but also signicantly lowered the thermodynamic stability.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and hydrogen storage kinetics of Mg₈₉RE₁₁ (RE = Pr, Nd, Sm) binary alloys

Chen

Liu

2019

RSC Adv.

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Dual-tuning effects of In, Al, and Ti on the thermodynamics and kinetics of Mg85In5Al5Ti5 alloy synthesized by plasma milling

Cited by 135 publications

References 41 publications

Metallic glassy Zr70Ni20Pd10 powders for improving the hydrogenation/dehydrogenation behavior of MgH2

Metallic glassy Zr70Ni20Pd10 powders for improving the hydrogenation/dehydrogenation behavior of MgH2

Influence of Admixtures of Si, Fe, Ti on Temperature and Kinetics of Dissociation of MgH$_2$ Obtained by Reactive Mechanical Alloyage

Microstructure and hydrogen storage kinetics of Mg₈₉RE₁₁ (RE = Pr, Nd, Sm) binary alloys

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Dual-tuning effects of In, Al, and Ti on the thermodynamics and kinetics of Mg85In5Al5Ti5 alloy synthesized by plasma milling

Cited by 135 publications

References 41 publications

Metallic glassy Zr70Ni20Pd10 powders for improving the hydrogenation/dehydrogenation behavior of MgH2

Metallic glassy Zr70Ni20Pd10 powders for improving the hydrogenation/dehydrogenation behavior of MgH2

Influence of Admixtures of Si, Fe, Ti on Temperature and Kinetics of Dissociation of MgH$_2$ Obtained by Reactive Mechanical Alloyage

Microstructure and hydrogen storage kinetics of Mg89RE11 (RE = Pr, Nd, Sm) binary alloys

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Microstructure and hydrogen storage kinetics of Mg₈₉RE₁₁ (RE = Pr, Nd, Sm) binary alloys