(1. 太原理工大學(xué) 材料科學(xué)與工程學(xué)院，太原 030024；
2. 清華大學(xué) 基礎(chǔ)工業(yè)訓(xùn)練中心，北京 100084；
3. 清華大學(xué) 物理系，北京 100084)
摘 要: 通過XRD、動電位極化法和放電容量測試等手段對Mg65Ni10RE25的非晶合金電極結(jié)構(gòu)、耐腐蝕性和放電容量等性能進(jìn)行了分析，并采用表征非晶合金形成能力的參數(shù)對其結(jié)構(gòu)和化學(xué)穩(wěn)定性進(jìn)行了評價。結(jié)果表明：設(shè)計的Mg65Ni10La25、Mg65Ni10Nd25和Mg65Ni10Mm25具有典型的非晶結(jié)構(gòu)特征。其中，Mg65Ni10Mm25通過增加組元提高了非晶合金的形成能力，同時，較高的原子堆垛密度和強烈的原子間相互作用抑制了晶化的進(jìn)行，使其具有良好的穩(wěn)定性；但多組元的添加則加速了合金在溶液中的腐蝕反應(yīng)，是導(dǎo)致Mg65Ni10Mm25非晶儲氫合金電極放電容量降低的主要原因。
關(guān)鍵字: Mg-Ni-RE非晶合金；儲氫材料；電極；放電容量
（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
