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首页> 外文期刊>Journal of power sources >Effects of cerium on the hydrogen absorption-desorption properties of rare earth-Mg-Ni hydrogen-absorbing alloys
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Effects of cerium on the hydrogen absorption-desorption properties of rare earth-Mg-Ni hydrogen-absorbing alloys

机译：铈对稀土Mg-Ni吸氢合金吸氢解吸性能的影响

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摘要

The influence of Ce addition on the phase constitution, microstructure, hydrogen absorption/desorption properties and battery performances of newly developed rare earth (RE)-Mg-Ni hydrogen-absorbing superlattice alloys for negative electrode materials in Ni-metal hydride (MH) batteries were investigated. The partial substitution of RE (La and Nd) with Ce results in a higher discharge performance and a lower cycle life in the battery. The Ce addition greatly affects the phase constitution, which is mainly characterized by increased formation of the AB(2) phase (A = RE or Mg and B = Ni or Al). The existence of the AB2 phase is found to accelerate alloy pulverization and oxidation when the alloys are used as negative electrode materials in Ni-MH model cells. The accelerated pulverization and oxidation are considered to be responsible for the observed higher discharge performance and lower cycle life in the batteries, respectively. (C) 2017 Elsevier B.V. All rights reserved.
机译：铈的添加对新开发的镍氢电池负极材料稀土（RE）-Mg-Ni吸氢超晶格合金的相组成，微观结构，氢吸收/解吸性能和电池性能的影响被调查了。用Ce部分替代RE（La和Nd）会导致更高的放电性能和更低的电池循环寿命。铈的添加极大地影响了相的组成，其主要特征是增加了AB（2）相的形成（A = RE或Mg，B = Ni或Al）。当将合金用作Ni-MH模型电池的负极材料时，发现AB2相的存在会加速合金的粉碎和氧化。加速的粉化和氧化被认为分别负责观察到的电池更高的放电性能和更低的循环寿命。 （C）2017 Elsevier B.V.保留所有权利。

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