采用机械球磨法制备了K2 Ti6 O13晶须单独掺杂、以及K2 Ti6 O13晶须与Ni粉复合掺杂的MgH2储氢复合体系，并通过XRD ，SEM ，DSC等检测手段对其微观结构与解氢性能进行表征。结果表明：当K2 Ti6 O13晶须单独掺杂于MgH2时，K2Ti6O13晶须起到助磨细化MgH2晶粒的作用，同时还抑制了MgH2颗粒的团聚，有效降低了MgH2基体的解氢温度，且当K2Ti6O13与MgH2质量配比为3∶7时，MgH2解氢性能的改善效果尤为明显，其解氢温度较纯MgH2球磨体系降低了近75℃；此外，当K2Ti6O13晶须和Ni粉末复合掺杂于MgH2时，得益于K2Ti6O13晶须的助磨细化MgH2晶粒以及Ni固溶于MgH2晶格致使其结构稳定性降低的双重作用，从而使得MgH2基体的解氢温度较K2 Ti6 O13晶须单独掺杂时进一步降低，相对于纯M g H2球磨体系降低了近87℃。
The K2 Ti6 O13 whisker separate‐doped and K2 Ti6 O13 whisker and Ni powder multi‐doped MgH2 hydrogen storage composite systems were prepared by mechanical milling method .The micro‐structures and dehydrogenation properties of the prepared samples were characterized by some testing methods such as X‐ray diffraction (XRD) ,scanning electron microscope (SEM ) and differential scan‐ning calorimeter (DSC) .The results show that the K2 Ti6O13 whisker not only plays the roles in refi‐ning the MgH2 crystalline grain ,but also inhibit the agglomeration of MgH2 particles in K2 Ti6 O13 whisker separate‐doped system ,which results in the decreased dehydrogenation temperature of MgH2 matrix .When the mass ratio of K2 Ti6 O13 to MgH2 is 3∶7 ,the improvement effect on dehydrogena‐tion properties of MgH2 is the most remarkable .As compared with pure ball‐milled MgH2 ,the dehy‐drogenation temperature of MgH2 in K2 Ti6 O13 whisker separate‐doped system is decreased by nearly 75℃ .For K2Ti6O13 whisker and Ni powder multi‐dopedsystem ,the dehydrogenation temperature of MgH2 matrix is further decreased compared to K2 Ti6O13 whisker separate‐doped one due to the dual effects of refined MgH2 crystalline grain by K2 Ti6 O13 whisker and destabilized MgH2 lattice by Ni so‐lution .As compared with pure ball‐milled MgH2 , the dehydrogenation temperature of MgH2 in K2 Ti6 O13 whisker and Ni powder multi‐doped system is decreased by nearly 87℃ .
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