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详细地研究了Ml(NiMnTi)_(4.2)Co_(0.8-x)Fe_x(x=0～0.8)合金的电化学性能。试验发现，随着Fe含量x从0增加至0．8，合金的活化性能得到改善，但最大放电容量从302mAh／g逐渐降低到280mAh／g，高倍率放电性能从78.5％缓慢降至72．5％；当Fe含量x≤0．4时，合金的自放电率与高Co合金（x=0）相比有所降低，但当Fe含量x超过0．4后，合金的目放电率较高Co合金有所上升；随着Fe含量的增加，合金的充放电循环稳定性略有下降，但下降幅度不大。试验结果表明，采用适量Fe部分替代Co，既可以降低合金成本，又能保持较好的综合电化学性能。
The electrochemical properties of Ml (NiMnTi) _ (4.2) Co_ (0.8-x) Fe_x (x = 0 ~ 0.8) alloys were investigated in detail. The experimental results show that the activation energy of the alloy is improved as the content of Fe increases from 0 to 0.8. However, the maximum discharge capacity decreases from 302 mAh / g to 280 mAh / g, and the high rate discharge decreases slowly from 78.5% to 72. 5%. When the Fe content is less than or equal to 0.4, the self-discharge rate of the alloy decreases compared with that of the high-Co alloy (x = 0). However, when the Fe content x exceeds 0.4, High-Co alloy increased; with the increase of Fe content, the stability of the charge-discharge cycle of the alloy decreased slightly, but the decline was not large. The test results show that the use of appropriate amount of Fe instead of Co can not only reduce the cost of the alloy, but also maintain a good overall electrochemical performance.