(1. 太原理工大学 材料科学与工程学院，太原 030024；
2. 清华大学 基础工业训练中心，北京 100084；
3. 清华大学 物理系，北京 100084)
摘 要: 通过XRD、动电位极化法和放电容量测试等手段对Mg65Ni10RE25的非晶合金电极结构、耐腐蚀性和放电容量等性能进行了分析，并采用表征非晶合金形成能力的参数对其结构和化学稳定性进行了评价。结果表明：设计的Mg65Ni10La25、Mg65Ni10Nd25和Mg65Ni10Mm25具有典型的非晶结构特征。其中，Mg65Ni10Mm25通过增加组元提高了非晶合金的形成能力，同时，较高的原子堆垛密度和强烈的原子间相互作用抑制了晶化的进行，使其具有良好的稳定性；但多组元的添加则加速了合金在溶液中的腐蚀反应，是导致Mg65Ni10Mm25非晶储氢合金电极放电容量降低的主要原因。
关键字: Mg-Ni-RE非晶合金；储氢材料；电极；放电容量
（1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2. Fundamental Industry Training Center, Tsinghua University, Beijing 100084, China;
3. Department of Physics, Tsinghua University, Beijing 100084, China）
Abstract:The amorphous Mg65Ni10RE25 alloys were prepared by copper-mold injection casting, and the structure, corrosion resistance property and discharge capacity of Mg65Ni10RE25 alloys were investigated by using XRD, electrical chemical test and discharge capacity test. The structure and chemical stability of the amorphous Mg65Ni10RE25 alloys were also evaluated by the parameters related to the glass-forming ability. The results show that the Mg65Ni10La25, Mg65Ni10Nd25 and Mg65Ni10Mm25 alloys all have an amorphous structure. Moreover, due to the addition of rare earth elements, the glasses-forming ability of Mg65Ni10Mm25 will be improved, and the crystallization will be inhibited. The addition of rare earth elements can accelerate the reaction rate, which becomes the main reason for the degradation of the discharge capacity.
Key words: amorphous Mg65Ni10RE25 alloys; hydrogen storage material; electrode; discharge capacity
