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对Ｍｌ（Ｎｉ_(４．５５－ｘ)Ｍｎ_(０．４)Ｔｉ_(０．０５)）合金（ｘ＝０．０─０．８）的相结构、气态吸放氢特性及电化学性能进行了系统的研究．结果表明，在ｘ≤０．３的组成范围内，合金保持单一的 ＬａＮｉ_５相；当 ｘ＞０．３时，合金中析出多种第二相，且第二相总量随Ｃｏ含量的增加而增多．随合金Ｃｏ含量的增加，晶胞体积增大，吸放氢平台下降，滞后减小，但贮氢容量降低．在ｘ≤０．３的组成范围内，合金的 Ｃｏ含量增加提高了合金的放电容量和高倍率放电性能；当ｘ＞０．３时，合金的放电容量下降，但改善了合金的循环稳定性．
The phase structure, gas absorption and desorption properties and electrochemical performance of Ml (Ni_ (4.55-x) Mn_ (0.4) Ti_ (0.05)) alloy (x = 0.0─0.8) The systematic research. The results show that the alloy maintains a single LaNi_5 phase within the composition range of x≤0.3. When x> 0.3, multiple second phases are precipitated in the alloy, and the total amount of the second phase increases with increasing Co content increase. With the increase of alloy Co content, the unit cell volume increases, the hydrogen absorption and desorption platform decreases, the hysteresis decreases, but the hydrogen storage capacity decreases. In the range of x≤0.3, the increase of the Co content of the alloy improves the discharge capacity and high rate discharge performance of the alloy. When x> 0.3, the discharge capacity of the alloy decreases, but the cycle stability of the alloy is improved .