P. Chen, Z. Xiong, J. Hu, G. Wu, National University of Singapore, Singapore, Singapore
The demand for efficient solid-state hydrogen storage materials encourages tremendous efforts in the development of novel systems. In this talk, we will report the recent progresses in the study of metal nitrides and imides as potential hydrogen sorbents. Hydrogen absorption and desorption over these newly synthesized substances can be taken place at temperatures lower than 150 ºC with more than 5 wt% of storage capacity. Investigations also indicate that chemical modifications on the subject materials considerably improve the materials’ performances in terms of equilibrium pressure and kinetics.
Summary: Seven novel Metal-N-H systems were developed for hydrogen storage. It is revealed that interaction between amides and hydrides leads to hydrogen desorption and new structure formation. Mg(NH2)2+LiAlH4, LiNH2+LiAlH4 and Mg(NH2)2+MgH2 systems can release hydrogen near ambient temperature with storage capacity higher than 4.5wt%, showing great promising for the practical application.
