Jian GuHubei Institute of Aerospace Chemotechnology, China
Gu Jian holds an MA degree in Applied Chemistry and a PhD degree in Materials Science, and is currently Head and Senior Engineer at the Space Innovative Center of Graphene and Nanomaterials of Hubei Institute of Aerospace Chemotechnology. He is mainly engaged in the functionalization of graphene and its application in the energetic materials. He has undertaken a number of projects, such as Per-research project, Postdoctoral fund, Innovation fund and major special R& D project. He has published more than 30 academic papers so far, of which 9 SCI papers. He also applied 15 National (International) invention patents, of which 5 patents has authorized.
Title：Liquid phase self-assembly preparation of GO@AlH3 with excellent thermal stability and safety properties
SymposiumB25 Non-traditional Applications
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Abstract
AlH3 is a metastable state hydrogen storage compound, which has poor thermal stability and safety properties. In this paper, graphene oxide (GO) was used to prepare the GO@AlH3 hydrogen-storage composites through liquid phase self-assembly method. By means of the elemental analyzer, the H content of raw AlH3 and GO@AlH3 are detected. The microstructure, composition and thermal stability of GO@AlH3 are characterized by using of SEM, XRD, XPS, and DSC-TG. The effect of contents of GO on the thermal properties and safety properties of GO@AlH3, such as thermal decomposition, weight loss, friction sensitivity and impact sensitivity, was investigated systematically. Results show that the H content of GO@AlH3 is almost uniform with that of raw AlH3. The thermal stability and safety properties of GO@AlH3 are improved with the increase of mass fraction of GO in it. Optimum safety properties can be obtained in the sample of GO 0.2wt%, which exhibits a 35% loss of friction sensitivity and a 200% enhancement of impact sensitivity, respectively. The DSC exothermic peak shifts to high temperature and the weight loss before 170oC are remarkably reduced, which reveal the GO@AlH3 has better thermal stability. Thus, we pointed out that the proper approach to improve the thermal stability and safety properties of AlH3, providing a new technical basis for its application research in the hydrogen storage field and energetic materials.
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