Crystal structure and electrochemical characteristics of non-AB5 type La–Ni system alloys
Crystal structure and electrochemical characteristics of non-AB5 type La–Ni system alloys
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DOI：
10.1016/j.jpowsour.2006.09.113
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发表时间：
2007-02
影响因子：
9.2
通讯作者：
S. Shi;C. Ouyang;M. Lei
中科院分区：
文献类型：
--
作者：
S. Shi;C. Ouyang;M. Lei
在Ar气氛下用电弧炉熔炼法制备了La-Ni系化合物。X射线衍射分析表明，所制备的合金由不同的相组成。通过不同温度和充放电电流下的充放电循环测试，研究了这些合金电极的活化、最大放电容量、高倍率充放电能力(HRC)和高倍率放电能力(HRD)等电化学性能。在所研究的La-Ni合金电极中，LaNi2.28合金具有最优异的高倍率充电性能，La2Ni7合金表现出最高的高倍率放电能力，而La7Ni3合金具有低温放电能力。
The La–Ni system compounds have been prepared by arc-melting method under Ar atmosphere. X-ray diffraction analysis reveals that the as-prepared alloys consist of different phases. The electrochemical properties, including activation, maximum discharge capacity, high rate chargeability (HRC), and high rate dischargeability (HRD) of these alloy electrodes have been studied through the charge–discharge recycle testing at different temperatures and charge (or discharge) currents. Among the La–Ni alloy electrodes studied, LaNi2.28alloy has the most excellent high rate charging performance, and La2Ni7alloy exhibit the highest high rate dischargeability, while La7Ni3alloy is capable of discharging at low temperature.