Crystal structure and electrochemical performance of La0.75Ce0.25Ni3.46-Al0.17Mn0.04Co1.33 alloy for high-power-type 29 Ah Ni-MH battery
来源期刊：Journal of Rare Earths2015年第6期
论文作者：栗欢欢 费扬 王亚平 陈龙 江浩斌
文章页码：633 - 638
摘 要：An AB5 type alloy, La0.75Ce0.25Ni3.46Al0.17Mn0.04Co1.33, was successfully prepared via partial substitution of Ce for La and Al, Mn, Co for Ni, respectively. The structure, morphology, and chemical composition of the as-obtained alloy powders were carefully examined by X-ray diffraction, scanning electron microscopy equipped with energy dispersive X-ray spectroscopy. Electrochemical properties of the hydrogen storage alloy were systematically investigated in standard 29 Ah Ni-MH batteries. The 29 Ah Ni-MH battery exhibited a theoretical discharge capacity of 29 Ah at 1 C. The capacity retention was 99% after 2000 cycles. Furthermore, excellent low temperature performance of this hydrogen storage alloy was obtained at-25 ℃. And the results showed that it exhibited not only high discharge capacity（21 Ah at-25 ℃ and 1 C）, excellent high current densities instantaneous discharge performance（discharge 0.9 Ah in 10 s at 12.5 C rate and the voltage could be maintained around 0.73 V）, but also remarkable high-rate discharge capacity（discharge 17.7 Ah at 50% SOC and 6.25 C, and the voltage could be maintained around 0.95 V）.
栗欢欢，费扬，王亚平，陈龙，江浩斌
Automotive Engineering Research Institute, Jiangsu University
摘 要：An AB5 type alloy, La0.75Ce0.25Ni3.46Al0.17Mn0.04Co1.33, was successfully prepared via partial substitution of Ce for La and Al, Mn, Co for Ni, respectively. The structure, morphology, and chemical composition of the as-obtained alloy powders were carefully examined by X-ray diffraction, scanning electron microscopy equipped with energy dispersive X-ray spectroscopy. Electrochemical properties of the hydrogen storage alloy were systematically investigated in standard 29 Ah Ni-MH batteries. The 29 Ah Ni-MH battery exhibited a theoretical discharge capacity of 29 Ah at 1 C. The capacity retention was 99% after 2000 cycles. Furthermore, excellent low temperature performance of this hydrogen storage alloy was obtained at-25 ℃. And the results showed that it exhibited not only high discharge capacity（21 Ah at-25 ℃ and 1 C）, excellent high current densities instantaneous discharge performance（discharge 0.9 Ah in 10 s at 12.5 C rate and the voltage could be maintained around 0.73 V）, but also remarkable high-rate discharge capacity（discharge 17.7 Ah at 50% SOC and 6.25 C, and the voltage could be maintained around 0.95 V）.
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