2002
DOI: 10.1016/s0925-8388(01)01460-8
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High catalytic activity disordered VTiZrNiCrCoMnAlSn hydrogen storage alloys for nickel–metal hydride batteries

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Cited by 44 publications
(33 citation statements)
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“…The activated (alkaline bath treated or cycled) AB2 alloy surface consists of a top nonelectrochemical reactive ZrO2 patch, a surface oxide (~200 nm) with embedded metallic Ni/Coclusters [10,93], and an amorphous buffer layer (~100 nm) underneath [94]. In one example, the Zr/Ti ratios are 8.2, 1.2, 0.8, and 1.9 for the top oxide, supporting oxide, buffer oxide, and bulk, respectively, which indicates a higher leaching rate for Zr compared to that of Ti [94].…”
Section: Oxidationmentioning
confidence: 99%
See 1 more Smart Citation
“…The activated (alkaline bath treated or cycled) AB2 alloy surface consists of a top nonelectrochemical reactive ZrO2 patch, a surface oxide (~200 nm) with embedded metallic Ni/Coclusters [10,93], and an amorphous buffer layer (~100 nm) underneath [94]. In one example, the Zr/Ti ratios are 8.2, 1.2, 0.8, and 1.9 for the top oxide, supporting oxide, buffer oxide, and bulk, respectively, which indicates a higher leaching rate for Zr compared to that of Ti [94].…”
Section: Oxidationmentioning
confidence: 99%
“…Meanwhile, the Laves phase AB 2 MH alloy has also been proposed to improve the energy density of Ni/MH batteries. Although the AB 2 MH alloy has the potential for relatively high capacity potential (440 mAh·g −1 [10,11] when compared to 330 mAh·g −1 from the AB 5 alloy), it suffers from a relatively slow electrochemical reaction rate and a less-desirable cycle life (see comparison in Table 1) [12]. A further comparison of the main battery performances between AB 2 and AB 5 MH alloys can be found in previous research (Table 1 in [13]).…”
Section: Introductionmentioning
confidence: 99%
“…Using Laves phase-based AB 2 metal hydrides (MHs) as the active material in the negative electrode can increase the gravimetric energy of a Ni/MH battery [3]. Two different Laves phases MH alloys are available for the electrochemical applications, specifically a C14 with a hexagonal crystal structure and a C15 with a face-centered-cubic crystal structure.…”
Section: Introductionmentioning
confidence: 99%
“…Two different Laves phases MH alloys are available for the electrochemical applications, specifically a C14 with a hexagonal crystal structure and a C15 with a face-centered-cubic crystal structure. Both structures have the same number of tetrahedral hydrogen occupation sites per AB 2 formula, which are indicted by yellow (A 2 B 2 ), blue (AB 3 Comparisons in crystal structure, hydrogen-storage (H-storage) characteristics in the gaseous phase (GP), and electrochemical (EC) properties of these two state-of-art representatives were reported in a separate paper [4]. It was suggested that the C14-predominated MH alloy was more suitable for high-capacity and long-life applications, while the C15-predominated MH alloy can be used in areas requiring improved high-rate (HR) and low-temperature (LT) performances [5].…”
Section: Introductionmentioning
confidence: 99%
“…[9,15,16] The interaction between the main working Laves phases and secondary minor phases appears to play an important role in improving the electrochemical properties of the alloys. [17][18][19][20] In addition, the multicomponent alloys have the best electrochemical properties in the as-cast state.…”
mentioning
confidence: 99%