纳米复合镁基储氢材料热力学及动力学调控

In this project, nano-crystalline structured Mg(In)H2-REH2~3-Tm hydrogen storage composite will be synthesized by using in-situ hydrogenating Mg(In)-RE-Tm alloy prepared by induction melting. The nanostructure could be the stabilized by Tm and REH2~3, and at the same time thermodynamics properties will be adjusted by In introducing and nano-crystallization while kinetics properties will be guaranteed the catalysis of REH2~3-Tm. The relationship between thermodynamic, kinetic properties and microstructure for Mg(In)H2-REH2~3-Tm nanocomposite will be explored. The data for thermodynamics and kinetics of Mg(In)H2-REH2~3-Tm composite hydrogen storage material will be measured accurately and the corresponding mathematical model will be built for further directing the adjustment for the thermodynamics and kinetics properties of Magnesium based hydrogen storage material. In addition, it will provide a new material for the development of mobile hydrogen source technology and the infrastructure construction of hydrogen refueling station. In a word, the Mg(In)H2-REH2~3-Tm composite hydrogen storage material with independent intellectual property rights will be developed in order to point the right direction for improving hydrogen storage properties of Magnesium based material and provide the new method for preparing the hydrogen storage material.

本项目拟通过感应熔炼制备Mg-In-RE-Tm合金，采用原位氢化合成方法制备纳米晶结构的Mg(In)H2-REH2~3-Tm复合储氢材料。充分发挥纳米化和In对热力学的调控作用，Tm和REH2~3对纳米结构稳定化作用及REH2~3-Tm对动力学的保障作用，针对其成分、组织结构调整的变化来研究其热力学和动力学特性；探索Mg(In)H2-REH2~3-Tm复合材料的储氢特性与其成分和组织结构的相关性及其影响的机制。将准确测定Mg(In)H2-REH2~3-Tm复合储氢材料的动力学和热力学性能数据，并建立起相对应的数学模型，实现对镁基储氢材料热力学和动力学调控，为发展移动氢源技术和加氢站等氢能基础设施提供新的材料，研制具有自主知识产权的Mg(In)H2-REH2~3-Tm纳米复合储氢材料，为进一步改善镁基材料的储氢性能指明方向,为储氢材料制备提供新的方法。

通过感应熔炼制备了Mg-In-Cd三元固溶体、Mg-In-Ni合金、Mg-In-RE-Ni合金和Mg-Ag-Al合金，采用等离子体辅助球磨方法制备了原位生成的MgF2催化的Mg-In-Al合金和Mg-In-Al-Ti合金，再通过原位氢化合成方法制备了纳米晶结构的Mg(In)H2基复合储氢材料。充分发挥了纳米化和In、Cd、Al对热力学的调控作用，Ni、REH2~3、TiH2和原位生成的MgF2催化剂对纳米结构稳定化作用及对动力学的保障作用，针对其成分、组织结构调整的变化来研究其热力学和动力学特性；探索Mg(In)H2基复合材料的储氢特性与其成分和组织结构的相关性及其影响的机制。将准确测定Mg(In)H2基复合储氢材料的动力学和热力学性能数据，实现对镁基储氢材料热力学和动力学调控，研制了具有自主知识产权的Mg(In)H2基纳米复合储氢材料和Mg基水解制氢材料，为进一步改善镁基材料的储氢性能提供了支持，并为储氢/制氢材料制备提供新的方法。