In the study, the hydrogen storing materials Mg–Ni-based Mg_50-xTi_xNi₄₅Al₃Co₂ (x = 0, 1, 2, 3, 4) + 50 wt% Ni (named Mg_50-xTi_xNi₄₅Al₃Co₂ (x = 0–4) + 50Ni) with nanocrystalline and amorphous structures were fabricated by the method of mechanical milling and designed for the negative electrode of Ni–MH batteries. The investigation aims at researching the function of Ti dosage on the electrochemical hydrogen storing characteristics and microstructure of the experimental specimens. The analysis of X-ray diffraction profiles and Scanning Electron Microscope images determines that the experiment specimens contain the major phase Mg₂Ni and the minor phase MgNi₂. The observation of TEM images reveals a fact that the specimens after ball-milling treatment consist of the nanocrystal and amorphism structures. The electrochemical tests show that as for the samples after ball-milling treatment, the discharge capacities of them gain the utmost value at the first circulate without activation treatment, and the increase of Ti dosage brings on an evident rise in the specimens' discharge capacity and cycle stability. Concretely, as the Ti content alters from 0 to 4, the discharge capacities of the as-milled (20 h) sample increase from 405.0 to 519.4 mAh/g and capacity retention rate of 100th circulate (S₁₀₀ = C₁₀₀/C_max) augments from 45% to 72%. What's more, a series of measurements, such as the high rate discharge ability (HRD), the electrochemical impedance spectrum (EIS) as well as Tafel polarization curves etc. show that the electrochemical kinetics performances of as-milled specimens in this experiment have a trend of increasing first and then decreasing with the addition of Ti element.

在研究中，储氢材料Mg–Ni基Mg _{50- x} Ti _x Ni ₄₅ Al ₃ Co ₂（x  = 0、1、2、3、4）+ 50 wt％Ni（称为Mg _{50- x} Ti _X的Ni ₄₅的Al ₃有限公司₂（X = 0-4）+ 50Ni）具有纳米晶体和非晶结构，是通过机械研磨的方法制造的，并设计用于Ni-MH电池的负极。该研究旨在研究Ti用量对实验样品电化学储氢特性和微观结构的作用。通过X射线衍射图谱和扫描电子显微镜图像分析确定该实验样品包含主相Mg ₂ Ni和次相MgNi ₂。TEM图像的观察揭示了一个事实，即球磨处理后的样品由纳米晶体和无定形结构组成。电化学测试表明，经球磨处理后的样品，未经活化处理，其放电容量在第一次循环时获得最大的值，Ti剂量的增加明显提高了样品的放电能力，循环稳定性。具体而言，当Ti含量从0变为4时，已研磨（20 h）样品的放电容量从405.0增加至519.4 mAh / g，并且第100次循环的容量保持率（S ₁₀₀  =  C ₁₀₀ / C _max）从45％增加到72％。此外，高速率放电能力（HRD），电化学阻抗谱（EIS）以及Tafel极化曲线等一系列测量结果表明，在此实验中，研磨后样品的电化学动力学性能具有Ti元素的添加先增加后减少的趋势。