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本文研究了非化学计量比混合稀土-镍系贮氢合金MmBx的配比数x对合金结构、热力学性能和金属氢化物（MH）电极充放电性能的影响。随着配比数x的减小，合金晶胞体积和金属氢化物生成焓（─ΔH）增加，平台压力降低且与配比x有lnpeq=1．99x-11．13的关系．当x＜5．0时，合金在CaCu5型主相之外析出Cc2Ni7第二相，该第二相具有较高的电催化活性．x＜5．0时，合金电极具有较高的初容量和活化性能．在x=4．8时．合金最大放电容量为274.7mA．h／g．
In this paper, the effect of the ratio x of non-stoichiometric mixed rare earth-nickel hydrogen storage alloy MmBx on the structure and thermodynamic properties of the alloy and the charge-discharge performance of the metal hydride (MH) electrode was investigated. With the decrease of the ratio x, the unit cell volume and the enthalpy of formation of metal hydride (─ΔH) increase, the pressure on the platform decreases and lnpeq = 1.99x-11.13 with the ratio x. When x <5.0, the alloy precipitates the second phase of Cc2Ni7 outside the main CaCu5 phase, which has higher electrocatalytic activity. When x <5.0, the alloy electrode has high initial capacity and activation performance. At x = 4.8. Alloy maximum discharge capacity of 274.7mA. h / g.