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]. A hydrogen storage alloy requires not only a large hydrogen capacity but also a fast hydriding/dehydriding reaction rate. By using magnesium hydride in nanocrystalline form obtained by BM[2... are the catalysis of hydrogen sorption in magnesium by reduction of activation barrier of hydriding/dehydriding reactions[6-7], facilitation of hydrogen diffusion in the matrix due to changes......
materials or negative anode electrode in Ni-MH batteries[1]. However, these kinds of the hydrides suffer from high thermodynamic stability, resulting in sluggish hydriding/dehydriding kinetics which makes them still far from practical applications. A variety of attempts, mechanical alloying (MA)[2], melt spinning[3], hydriding combustion synthesis[4], surface modification[5], adding catalysts[6], etc......
properties of AB5 alloys with particular reference to the LaNi5-xAlx ternary alloy system [J]. Inorg Chem, 1979, (18) : 3343. [4] Lambert S W, Chandra D, Cathey W N, et al. Investigation of hydriding...学学报) , 1992, (4) : 558~562. [9] Cantrell J S, Beiter T A and Bowman R C Jr. Crystal structure and hydriding behavior of LaNi5-ySny [J]. J Alloys Comp, 1994, (207~208) : 372~376. [10......
by hydriding-dehydriding treatment, nano-structured as-hydrided Mg-3%Al-1%Zn (AZ31 Mg) (mass fraction) alloy powders were thermally dehydrided at various temperatures from 275 to 375 ℃. The kinetics..., as indicated by TAKAMURA et al[12-13]. In an effort to establish a new way to produce nanocrystalline Mg alloy powders, we have recently developed a mechanically assisted hydriding- dehydriding......
Microstructure of alloy MlNi3.75Co0.75Mn0.3Al0.2 (Ml-La-rich mischmetal) during electrochemical hydriding-dehydriding process YUAN Zhi-qing(袁志庆)1, L Guang-lie(吕光烈)1,GU Jian-ming(顾建明)1, SHENG Xiao... of microstructures of alloy MlNi3.75Co0.75Mn0.3Al0.2 (Ml-La-rich mischmetal) during the electrochemical hydriding-dehydriding process was studied by using in-situ X-ray diffraction method......
by gravity casting and hydrogen-storage properties of Mg-23.5%Ni-(5, 10 and 15%)La[J]. J Alloys Comp, 2008, 463: 143-147. [6] LIU F J, SUDA S. Properties and characteristics of fluorinated hydriding..., GEBERT A. Electrochemical hydrogenation of Mg65Cu25Y10 metallic glass[J]. J Alloys Comp, 2004, 364: 229-237. [12] SPASSOV T, K?STER U. Thermal stability and hydriding properties of nanocrystalline melt......
of Alloys and Compounds, 1999, 293/294/295: 521-525. [11] Spassov T, K?ster U. Thermal stability and hydriding properties of nanocrystalline melt-spun Mg63Ni30Y7 alloy[J]. Journal of Alloys..., 2002, 339(1/2): 230-235. [13] Friedlmeier G, Arakawa M, Hirai T, et al. Preparation and structural, thermal and hydriding characteristics of melt-spun Mg-Ni alloys[J]. Journal of Alloys and Compounds......
, the practical applications of Mg2Ni-type alloy for Ni-MH batteries are full of challenges because of some innate shortcomings, such as sluggish hydriding/dehydriding kinetics, low electrochemical discharge... to the increased corrosion resistance [7]. Furthermore, it was documented that the hydriding and dehydriding kinetics of the Mg and Mg-based alloys are very sensitive to their structures [8]. WANG et al [9......
- and Copper-substitution Effects on Thermal Stabilities and Hydriding Properties of Amorphous MgNi[J]. Journal of Alloys and Compounds, 1998, 280(1-2): 279-283.[2]LEE H Y, GOO N H, JEONG W T, et al.... Hydriding-dehydriding Characteristics of Aged Mg-10%Ni Alloy Hydride and Water Resistance of Sol-gel Encapsulated Composite[J]. Journal of Alloys and Compounds, 2000,311(2):207-213.[4]GASIOROWSKI......
, Suda S, et al. Physicochemical and electrochemical hydriding-dehydriding characteristics of amorphous MgNix(x=1.0, 1.5, 2.0) alloys prepared by mechanical alloying[J]. J Solid State Electrochem, 2001... and TiNi synthesized by mechanical alloying[J]. Journal of Alloys and Compounds, 2003, 360: 243-249. [6]LI Li-quan. Reaction mechanism of hydriding combustion synthesis of Mg2NiH4[J]. Intermetallics......