Study on Preparation and Electrochemical Properties of Mm_0.75Mg_0.25Ni_3.5Co_0.2Al_0.3 Hydrogen Storage Alloy with High Stability and Low Cost AITranslate

1邓安强,罗永春,王浩,赵磊,罗元魁.退火处理对A_2B_7型La_(0.63)(Pr_(0.1)Nd_(0.1)Y_(0.6)Sm_(0.1)Gd_(0.1))_(0.2)Mg_(0.17)Ni_(3.1)Co_(0.3)Al_(0.1)储氢合金相结构和电化学性能的影响[J].材料导报,2018,32(15):2565-2570. 被引量：7

3卢照,覃铭,蒋卫卿,卿培林,刘淑辉.Effect of AB_(2-)based alloy addition on structure and electrochemical properties of La_(0.5)Pr-(0.2)Zr_(0.1)Mg_(0.2)Ni_(2.75)Co_(0.45)Fe_(0.1)Al_(0.2) hydrogen storage alloy[J].稀土学报：英文版,2013,31(4):386-394. 被引量：2

10Lijun Lv,Jian Lin,Guo Yang,Zhaowei Ma,Linhua Xu,Xiujie He,Xingbo Han,Wei Liu.Hydrogen storage performance of LaNi_(3.95)Al_(0.75)Co_(0.3) alloy with different preparation methods[J].自然科学进展·国际材料：英文版,2022,32(2):206-214.

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Chinese Library Classification Number:TG139.7[一般工业技术—材料科学与工程]

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Mm_0.75Mg_0.25Ni_3.5Co_0.2Al_0.3(Mm represents lanthanum-rich mixed rare earth)as-cast alloy was prepared in a high-frequency induction levitation furnace and then annealed at different temperatures.XRD analysis shows that the alloy is mainly composed of LaNi₅ phase and La₂Ni₇ phase.The diffraction peaks of LaNi₅ and La₂Ni₇ alloy phases are strengthened after annealing treatment.At the annealing temperature of 800℃,the unit cell volume of La₂Ni₇ reaches the maximum value of 0.5497nm³,indicating that Co and Al alloying elements can be better dissolved in the main phases after annealing treatment at 800℃.Elec-trochemical test analysis shows that the annealed alloy at 800℃ has a maximum discharge capacity of up to 351.5 mA·h/g,a capacity retention rate of 82.3%after 130charge-discharge cycles,and excellent high-rate discharge performance.