Mg_(1.7)M_(0.3)(M=Mg,Ti,Al)Ni贮氢合金结构及性能研究

Study on the Crystalline Structure and Electrochemical Properties of Mg_(1.7)M_(0.3)(M=Mg,Ti,Al)Ni Alloys

采用固态烧结法制备了Mg1 7M0 3(M =Mg、Ti、Al)Ni贮氢合金 ,X射线衍射分析结果表明 ,适当提高烧结温度有利于Mg2 Ni相的形成 ;Ti对Mg的取代未引起合金相结构的明显变化 ,而Al取代Mg除有Mg2 Ni相外 ,还有一呈立方晶体结构的新相生成。Ti、Al对Mg的取代 ,不仅提高了Mg2 Ni合金的放电容量 ,同时也提高了合金的循环寿命。

Mg 1.7M 0.3(M=Mg?Ti?Al)Ni alloys were synthesized by solid-sintering method.XRD shows that improving sintering temperature is useful for producing Mg 2Ni phase.It also shows that Ti substitution can't change alloy crystalline,but Al substitution produces a new cubic crystalline phase beside Mg 2Ni phase.Ti and Al substitutions for Mg not only improve discharge capacity,but also improve cycle life.