Synthesis and electrochemical properties of high-energy ball-milled Laves phase (Zr,Ti)(V,Mn,Cr)2 alloys with nickel powder

Jurczyk, M.; Rajewski, W.; Majchrzycki, W.; Wójcik, Grażyna

doi:10.1016/s0925-8388(98)00574-x

Cited by 23 publications

(7 citation statements)

References 8 publications

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“…A fluorination process can improve the surface anti-corrosion capability [66][67][68][69][70][71] and HRD [72], while a hot alkaline bath helps remove the native oxide that forms during the processes and creates a less dense oxide with catalytic Ni, which further increases the surface's catalytic ability [51,66,73,74] and HRD [72]. Other methods include hot-charging performed at 80 • C [75], surface treatment in NH 4 F and NiCl 2 solution [76], NiO coating by the sol-gel method [77], electroless Cu-coating [78], ball-milling with [79,80] or without Ni powder [81,82], ball-milling with La-containing AB 5 or A 2 B 7 MH alloys [83], and surface reduction by KBH 4 and NaBH 4 [84].…”

Section: Surface Treatmentmentioning

confidence: 99%

C14 Laves Phase Metal Hydride Alloys for Ni/MH Batteries Applications

2017

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C14 Laves phase alloys play a significant role in improving the performance of nickel/metal hydride batteries, which currently dominate the 1.2 V consumer-type rechargeable battery market and those for hybrid electric vehicles. In the current study, the properties of C14 Laves phase based metal hydride alloys are reviewed in relation to their electrochemical applications. Various preparation methods and failure mechanisms of the C14 Laves phase based metal hydride alloys, and the influence of all elements on the electrochemical performance, are discussed. The contributions of some commonly used constituting elements are compared to performance requirements. The importance of stoichiometry and its impact on electrochemical properties is also included. At the end, a discussion section addresses historical hurdles, previous trials, and future directions for implementing C14 Laves phase based metal hydride alloys in commercial nickel/metal hydride batteries.

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Section: Surface Treatmentmentioning

confidence: 99%

C14 Laves Phase Metal Hydride Alloys for Ni/MH Batteries Applications

2017

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“…A detailed description of the electrode preparation was given in Ref. [10]. The electrochemical properties of such electrodes were measured in a three-compartment glass cell in deaerated 6 M KOH solution, using a much larger NiOOH/Ni(OH) 2 counter electrode and a Hg/HgO/6 M KOH reference electrode.…”

Section: Methodsmentioning

confidence: 99%

Nanocrystalline Hydrogen Storage Alloys Formed by Mechanical Alloying

Jurczyk

Rajewski

2000

Interface Controlled Materials

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The structural and electrochemical properties of a range of alloys, including: ZrV 2 , ZrV 1.5 Ni 0.5 , which have the cubic MgCu 2 structure, Zr 0.35 Ti 0.65 V 0.85 Cr 0.26 Ni 1.30 , which has the hexagonal MgZn 2 structure and MmNi 5 , MmNi 4.2 Al 0.8 , MmNi 3.5 Co 0.7 Al 0.8 , which have the hexagonal CaCu 5 type structure, have been investigated. These alloys have been prepared using mechanical alloying (MA) followed by annealing. The amorphous phase forms directly from the starting mixture of the elements, without other phase formation. Heating the MA samples at 1070 K for 1 h resulted in the creation of ordered alloys. For some nanocrystalline materials discharge capacities of 210 mAh g -1 were obtained.

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“…The nanocrystalline ZrV 2 and Zr 0.35 Ti 0.65 V 0.85 Cr 0.26 Ni 1.30 alloys were synthesized by MA, followed by annealing [34,35]. The electrochemical properties of nanocrystalline powders were measured and compared with those of amorphous material.…”

Section: 32mentioning

confidence: 99%

“…Independently, it has been shown, that the electrochemical properties of hydrogen storage alloys, which do not contain nickel, can be stimulated by HEBM of the precursor alloys with a small amount of nickel powders [34]. The ZrV 2 and Zr 0.5 Ti 0.5 V 0.8 Mn 0.8 Cr 0.4 alloy powders have been prepared in this way, after which it was confirmed that the discharge capacity of electrodes prepared by the application of ZrV 2 and Zr 0.5 Ti 0.5 V 0.8 Mn 0.8 Cr 0.4 alloy powders with 10 wt.% nickel powder addition was impossible to estimate because of the extremely high polarization.…”

Section: 32mentioning

confidence: 99%