针对熔体快淬法制备的非晶Mg65Ni27La8合金利用置换沉积的方法在非晶合金表面沉积金属Ag,以期改善合金电极的循环性能.修饰后的合金电极最大放电比容量虽然略低于修饰前的合金电极(590 mAh/g),但是都显示了较好循环稳定性.当Ag/Mg的摩尔比为1/5时,合金电极最大放电容量为551 mAh/g,且合金经过20个充放电循环后放电比容量保持率仍达69%;线性极化曲线显示其交换电流密度为353 mA/g;表面修饰后的合金颗粒之间的接触阻抗和合金表面的电荷传输阻抗均有不同程度的降低,分别由修饰前的0.91 Ω和3.15 Ω降低到0.33 Ω和0.85 Ω.
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