Li-Mg-N-H体系储氢材料的研究进展-中国材料进展

文章信息/Info

Author(s):: CAI Mingyuan; LI Chao; ZHANG Liping; YAO Zhendong; FAN Meiqiang; (School of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China)

Keywords:: hydrogen storage materials; Li-Mg-N-H system; amides; imides; hydrides

摘要:: 以Mg(NH2)2-2LiH为代表的Li-Mg-N-H体系储氢材料因其储氢容量高、吸放氢可逆、热力学性能较为适宜等优势，被认为是目前最有望实现车载实用化的固态储氢材料之一。该体系的最大问题是吸放氢反应的动力学壁垒较高。综述了Li-Mg-N-H体系主要的成分体系及储氢性能、储氢性能的改善和规模化应用探索等相关研究进展。Li-Mg-N-H体系储氢性能改善的策略主要为材料纳米化和催化改性，其中有效的催化改性剂包括碱金属基化合物（不含硼氢化物）、金属硼氢化物、过渡金属及其化合物、碳材料等。最后,讨论了该体系实现车载实用化需要重点关注的研究方向。

Abstract:: Li-Mg-N-H system hydrogen storage materials represented by Mg(NH2)2-2LiH has been considered to be one of the most promising solidstate hydrogen storage materials for on-board application, because it has high reversible hydrogen storage capacity and favorable thermodynamic properties. The biggest problem of this system is the high de/hydrogenation kinetic barrier. In this paper, the research progress on the components design of the Li-Mg-N-H system and their hydrogen storage properties, improvement of its hydrogen storage performance and large-scale application attempts are reviewed. The strategies for improving the hydrogen storage performance of the Li-Mg-N-H system are mainly nanosizing, catalysis and doping modification. Effective catalytic modifiers include alkali metalbased compounds (not including borohydrides), metal borohydrides, transition metals and their compounds, carbon materials, etc. Finally, the future research directions of the Li-Mg-N-H system for on-board application are discussed.