Crystal structure and electrochemical characteristics of non-AB₅ type La–Ni system alloys

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• 作者：Siqi Shi ; Chuying Ouyang ; Minsheng Lei
• 关键词：Ni– ; MH battery ; Hydride electrode alloy ; High rate chargeability ; High rate dischargeability
• 刊名：Journal of Power Sources
• 出版年：2007
• 出版时间：10 February 2007
• 年：2007
• 卷：164
• 期：2
• 页码：911-915
• 全文大小：657 K

文摘

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, LaNi_2.28 alloy has the most excellent high rate charging performance, and La₂Ni₇ alloy exhibit the highest high rate dischargeability, while La₇Ni₃ alloy is capable of discharging at low temperature.