| Mmx（NiCoMnTi）5贮氢合金的电极特性 |
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| 引用本文： | 张文鹏 魏丹. Mmx（NiCoMnTi）5贮氢合金的电极特性[J]. 功能材料, 1998, 29(6): 665-666 |
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| 作者姓名： | 张文鹏 魏丹 |
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| 作者单位： | 冶金部钢铁研究总院新材料所!北京，100081(张文鹏，吴建民，莫付江)，中国腐蚀与防护学会!北京，100083(魏丹) |
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| 摘 要： | 测试了MmxNi3．8Co0．6Mn0．55Ti0．05合金的充放电特性及循环寿命。当x＝1．05时，合金有较高的放电容量，其循环寿命略微降低，这主要归因于稀土元素有较好的吸氢特性且易在晶界处偏析，形成MmNi相。当x＝0．95时，合金的放电容量及循环寿命显著降低，这是由于合金中的Mn向晶界处偏析，且极易溶于6mol／LKOH中，破坏了合金的表面，降低了放电容量和循环寿命。
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| 关 键 词： | 贮氢合金 充放电特性 循环寿命 放电 容量 |
The Electrode Characteristics of the Mm_x(NiCoMnTi)_5 Hydrogen Storage Alloys |
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| Zhang Wenpeng, Wei Dan, Wu Jianmin, Mo Fujiang. The Electrode Characteristics of the Mm_x(NiCoMnTi)_5 Hydrogen Storage Alloys[J]. Journal of Functional Materials, 1998, 29(6): 665-666 |
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| Authors: | Zhang Wenpeng Wei Dan Wu Jianmin Mo Fujiang |
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| Abstract: | The charge-discharge characteristics of MmxNi3.8Co0.6 Mn0.55Ti0.05 alloys were investigated . When x=1 .05 , thealloy had higher discharge capacity and lower cycle lifetime . It was due to the the rare earth elements high hydrogen-absorption characteristics and the precipitation of MmNi phase at the grain boundaries . When x= 0.95, the discharge capacity and cycle lifetimedecreased obviously owing to the precipitation of Mn element at the grain boundaries , and the Mn element was solved in the6mol/L KOH easily, broke the surfaces of the alloy, decreased the cycle lifetime . |
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| Keywords: | hydrogen storage alloys charge-discharge characteristics cycle lifetime discharge capacity |
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