Electrode characteristics of nanocrystalline TiFe-type alloys

Jurczyk, M.; Jankowska, E.; Makowiecka, M.; Wieczorek, I.

doi:10.1016/s0925-8388(02)01347-6

Cited by 36 publications

(17 citation statements)

References 9 publications

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“…Negative electrodes were fabricated by compacting the alloy powder onto an expanded nickel substrate through a roll mill without any binder. Half-cell measurements were performed using a CTE MCL2 Mini cell testing Annealing has been used to effectively alter the phase components in the AB [38,39], AB 2 [40][41][42][43], AB 3 [44][45][46][47], A 2 B 7 [48][49][50][51], A 5 B 19 [52], AB 5 [53][54][55], A 8 B 21 [56,57], and body-centered-cubic (bcc) [58] MH alloys. According to first-principle calculations on superlattice MH alloy systems, the preferable phase abundance can be influenced by the starting composition and annealing condition [59,60].…”

Section: Methodsmentioning

confidence: 99%

Comparison among Constituent Phases in Superlattice Metal Hydride Alloys for Battery Applications

Kim

Ouchi²,

Nei³

et al. 2017

Batteries

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Abstract:The effects of seven constituent phases-CeNi 3 , NdNi 3 , Nd 2 Ni 7 , Pr 2 Ni 7 , Sm 5 Ni 19 , Nd 5 Co 19 , and CaCu 5 -on the gaseous phase and electrochemical characteristics of a superlattice metal hydride alloy made by induction melting with a composition of Sm 14 La 5.7 Mg 4.0 Ni 73 Al 3.3 were studied through a series of annealing experiments. With an increase in annealing temperature, the abundance of non-superlattice CaCu 5 phase first decreases and then increases, which is opposite to the phase abundance evolution of Nd 2 Ni 7 -the phase with the best electrochemical performance. The optimal annealing condition for the composition in this study is 920 • C for 5 h. Extensive correlation studies reveal that the A 2 B 7 phase demonstrates higher gaseous phase hydrogen storage and electrochemical discharge capacities and better battery performance in high-rate dischargeability, charge retention, and cycle life. Moreover, the hexagonal stacking structure is found to be more favorable than the rhombohedral structure.

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Section: Methodsmentioning

confidence: 99%

Comparison among Constituent Phases in Superlattice Metal Hydride Alloys for Battery Applications

Kim

Ouchi²,

Nei³

et al. 2017

Batteries

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show abstract

“…Among the available different hydrogen storage systems, metal hydrides have been mostly attracted due to their high volumetric energy density and favorable heat of formation that allows operation at ambient temperatures [1,2]. Many researchers have studied the hydrogen storage properties of various types of metal hydride families such as AB, AB 2 , AB 3 , AB 5 , Mg-based systems and BCC alloys [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Improvement of hydrogen storage properties of the AB2 Laves phase alloys for automotive application

Kandavel

Bhat

Rougier

et al. 2008

International Journal of Hydrogen Energy

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“…The discharge capacity of electrodes prepared from TiFe alloy powder by the application of MA and annealing displayed a very low capacity (7.50 mA Á h g À1 at 4 mA g À1 discharge current), whereas the arcmelted electrodes had no capacity [31]. The reduction in powder size, and the creation of new surfaces, is effective for the improvement of the hydrogen absorption rate.…”

Section: An Overview Of Hydrogen Storage Systemsmentioning

confidence: 99%