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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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RE(Ni,Co,Mn,Ti)5合金(RE=La,Ce,Pr,Nd)的单胞体积对电化学性能的影响
, PP. 61-66
Keywords: 贮氢电极合金,稀土,电化学性能
Abstract:
制备了La(Ni,Co,Mn,Ti)5,Ce(Ni,Co,Mn,Ti)5,Pr(Ni,Co,Mn,Ti)5和Nd(Ni,Co,Mn,Ti)5四种单一稀土贮氢电极合金,分别测定了它们的单胞体积、氢化物生成焓和几个主要的电化学性能指标(包括活化循环次数、最大放电容量、高倍率放电率和容量衰退速率),以分析不同稀土元素对合金电化学性能的影响.结果表明,在四种合金中,单胞体积对合金的热力学性质和电化学性能起了决定性作用,它与合金的氢化物生成焓呈简单的线性关系,对电化学性能有双重影响,使四个主要指标随单胞体积的变化均出现极大或极小值.单胞体积本身的变化与稀土元素的周期性有关.
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