Hydrogen Absorption Characteristics of Crystalline LaNi5 Prepared by Mechanical Alloying

Sakaguchi, Hiroki; Sugioka, Takuo; Adachi, Gin‐ya

doi:10.1246/cl.1995.561

Cited by 10 publications

(3 citation statements)

References 11 publications

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“…On the other hand, mechanical alloying seems to be a suitable procedure for the synthesis of nanocrystalline AB 5 alloys [148][149][150]. When milling is performed under an inert atmosphere, hydrogen can be readily absorbed if the milled powder is not exposed to the air [151].…”

Section: Abmentioning

confidence: 99%

Metal Hydrides

Huot

2010

Handbook of Hydrogen Storage

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Metal hydrides are promising candidates for many stationary and mobile hydrogen storage applications. Presently, the most common use of metal hydrides is as anode material in commercial nickel-metal hydrides (Ni-MH) rechargeable batteries which have replaced conventional nickel-cadmium batteries in many applications. A wide variety of Ni-MH batteries are now on the market with cell sizes ranging from 30 mAh to 250 Ah [1,2]. Some other applications are: hydrogen compression [3], aircraft fire-detectors [4], isotope separation [5], and hydrogen getters for microelectronic packages. Hydride formation is also used in the HDDR process (hydrogenation-disproportionation-desorption-recombination) for the synthesis of magnetic materials such as Nd 2 Fe 14 B [6]. A striking application is as a component of cryocoolers for the ESA Planck mission [7]. Another exciting new application is the use of metal hydrides for switchable mirrors [8]. As we can see, metal hydrides have a wide range of applications. However, most research and development is targeted towards two applications: batteries and hydrogen storage. The former is now widely exploited but the latter is still facing many technical problems. The main advantages of storing hydrogen in a metal hydride are the high hydrogen volumetric densities (sometimes higher than in liquid hydrogen) and the possibility to absorb and desorb hydrogen with a small change in hydrogen pressure [9].The physics of hydrogen in elemental metals was reviewed at the end of the 1970s in thebooksHydrogeninMetals,volumesIandII [10,11].The1970s alsosawtheemergence of the important field of intermetallic compounds as hydride materials. An in-depth review of this field can be found in Hydrogen in Intermetallic Compounds volumes I, and II [12,13]. A review of the propertiesand applications of hydrogen in metals can befound in the third volume of Hydrogen in Metals [14]. The basic properties of the metal-hydrogen system are discussed from a fundamental point of view by Fukai [15]. Although initial studies on nanocrystalline and amorphous metal hydrides were initiated around the 1980s [16], the real emergence of nanocrystalline metal hydrides as a new class of Handbook of Hydrogen Storage. Edited by Michael Hirscher

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Section: Abmentioning

confidence: 99%

Metal Hydrides

Huot

2010

Handbook of Hydrogen Storage

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“…At the same time, the product can be produced easily by ball milling. [51,52] A material synthesized in such a manner exhibits improved hydrogenation and dehydrogenation kinetics, [53] see Figure 8. It was also shown that a nanocomposite produced by ball milling of the immiscible metals Fe and Mg exhibits better hydrogenation kinetics and reversible capacities for hydrogen than the same material produced by sintering.…”

Section: Nanocompositesmentioning

confidence: 99%

Nanotechnological Aspects in Materials for Hydrogen Storage

Fichtner¹

2005

Adv Eng Mater

230

162

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A nanotechnological app#roach aims at making tailor‐made developments for storage materials by combining different scientific disciplines and focussing on processes on the microscale. The approach has already been successful in achieving major advances in the field of novel solid materials for hydrogen storage. However, further breakthroughs are necessary to reach the goal of storage systems for fuel cell‐driven, mobile applications.

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“…The mechanochemical method allows to change thermal stability of a hydride phase, to decrease/increase temperature of its decomposition or a phase transition, to expand significantly a region of the ␣-solid solution or to constrict a two-phase region, to change equilibrium pressure, etc. [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%