具有调制结构的三元与二元镁基储氢合金

Ternary and binary magnesium-based hydrogen storage alloys with modulated structures

镁基材料是极具发展前景的低成本高容量可逆储氢材料。为改善氢化镁的热力学和动力学性能,本文提出了利用调制结构中的晶内特殊有序结构与成分分布特性来调控镁基材料的储氢热力学和动力学。设计并制备了含有长周期堆垛有序结构(LPSO)的三元Mg-TM(Ni,Cu)-Y储氢合金,利用半共溅射方法设计制备了双组元调制结构Mg-TM(Ti,Zr,Ni)储氢薄膜,比较研究了三组元Mg-TM-Y型中LPSO与双组元Mg-TM调制结构镁基储氢合金的吸/放氢反应规律。研究结果为设计新型镁基材料提供了新的结构调控思路。

Magnesium-based hydrogen storage alloys with high hydrogen capacity and good reversibility are promising for practical applications.To improve the hydrogenation/dehydrogenation thermodynamics and kinetic properties of Mg-based alloy,this work proposed to use the special ordered structure and composition distribution characteristics in the modulated structure to adjust the thermodynamics and kinetic properties of hydrogen storage of Mg-based materials.We designed and prepared the ternary Mg-TM(Ni,Cu)-Y hydrogen storage alloys containing a long-period stacking ordered structures(LPSOs).A series of dual-component Mg-TM(Ti,Zr,Ni)with modulated structures hydrogen storage thin film were designed and prepared using a semi-cosputtering method.The three-component Mg-TM-Y type LPSO and two-component Mg-TM modulation structure in Mg-based hydrogen storage alloys have been comparatively studied.The research provides novel ideas of structural control for the design of Mg-based materials.