研究了元素Y(钇)对La1-xJNi4.8Mn0.2(x=0.6,0.7,0.8)合金储氢性能的影响,结果表明:La1-xYxNi4.8Mn0.2合金为CaCu5型六方结构；随着Y含量的增加,晶格参数a和晶胞体积V减小,而c几乎不变,c/a线性增大;随着Y含量的增加,合金的吸放氢平台压显著升高,吸氢量减少,吸放氢平台斜率Sf和滞后系数Hf略有增加,滞后系数Hf与XRD(111)峰的半高宽(FWHM)值的变化有着很好的对应关系,抗粉化性能提高.当Y含量x=0.8时,合金的吸放氢动力学综合性能最好.
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