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研究了退火时间对快淬LaNi3合金相结构及电化学性能的影响。结果表明,合金快淬后的相组成为LaNi3相、LaNi5相、La2Ni7相和LaNi2.28相。经750℃退火后,合金主要由LaNi3相和La2Ni7相组成。退火时间较短(0 h和1 h)时,合金中存在少量LaNi5相;保温3 h时,LaNi5相已基本消失。随退火时间增加,合金的最大放电容量由145.94 mAh/g(0 h)增加到176.44 mAh/g(3 h)。
The effect of annealing time on the phase structure and electrochemical properties of LaNi3 alloy was investigated. The results show that the phase composition of the alloy after rapid quenching is LaNi3 phase, LaNi5 phase, La2Ni7 phase and LaNi2.28 phase. After annealed at 750 ℃, the alloy mainly consists of LaNi3 phase and La2Ni7 phase. When the annealing time is short (0 h and 1 h), a small amount of LaNi5 phase exists in the alloy. When the annealing time is 3 h, the phase of LaNi5 basically disappears. With the increase of annealing time, the maximum discharge capacity of the alloy increased from 145.94 mAh / g (0 h) to 176.44 mAh / g (3 h).