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OALib Journal期刊
ISSN: 2333-9721
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元素掺杂对镁基储氢合金电化学性能的影响
DOI: 10.3969/j.issn.1671-7627.2011.04.012, PP. 52-57
Keywords: 镁基储氢合金,氢化燃烧合成,金属掺杂,电化学性能
Abstract:
利用氢化燃烧合成复合高能球磨法制备镁基储氢电极合金mg2nih4,并对合金进行不同元素(cr、co、nb、ti和v)掺杂处理。使用x线衍射仪(xrd)和电化学工作站对材料结构性能进行表征,并考察不同元素掺杂对电极合金的结构和电化学性能的影响。结果表明:少量金属元素掺杂处理并没有改变合金的主相结构。元素掺杂降低了合金电极的最大放电容量和动力学性能,但是合金电极的电化学循环稳定性均得到不同程度的提高,其中ti掺杂处理对于改善合金电极电化学循环性能最为明显。
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