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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Compositional optimization of vanadium-free hypo-stoichiometric AB_2 metal hydride alloy for Ni/MH battery application
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Compositional optimization of vanadium-free hypo-stoichiometric AB_2 metal hydride alloy for Ni/MH battery application

机译：用于Ni / MH电池的无钒次化学计量AB_2金属氢化物合金的成分优化

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摘要

In an effort to reduce raw material cost and improve the charge retention characteristic of nickel metal hydride batteries, the Ti, Zr, and Ni-contents in vanadium-free AB_2 metal hydride alloys were optimized according to their capacity, charge retention, activation, high-rate capability, low-temperature performance, and cycle stability. A multi-component hypo-stoichiometric AB_2 alloy with a composition of Ti_(10)Zr_(27)Cr_8Mn_(15)Co_5Ni_(35) was identified and compared to vanadium-containing AB_2 metal hydride alloys. Vanadium-free alloys provided better charge retention performance but with a trade-off in cycle life. The gaseous and electrochemical storage properties were correlated to both the average composition and the stoichiometry of the main AB_2 phases.
机译：为了降低原材料成本并改善镍氢电池的电荷保持特性，无钒AB_2金属氢化物合金中的Ti，Zr和Ni含量根据容量，电荷保持，活化，高速率能力，低温性能和循环稳定性。确定了具有Ti_（10）Zr_（27）Cr_8Mn_（15）Co_5Ni_（35）组成的多组分低化学计量AB_2合金，并将其与含钒的AB_2金属氢化物合金进行了比较。无钒合金提供了更好的电荷保持性能，但在循环寿命方面有所取舍。气态和电化学存储特性与主要AB_2相的平均组成和化学计量均相关。

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