燃料电池轻质可逆储氢体系的研究

项目名称： 燃料电池轻质可逆储氢体系的研究

项目编号： No.20806010

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 白莹

作者单位： 北京理工大学

项目金额： 18万元

中文摘要： 本项目拟围绕燃料电池对在线供（储）氢的需要，研究新型高性能的轻质可逆储氢材料。将以LiBH4、NaBH4等轻质配位氢化物和LiNH2 、NaNH2等轻质氨基化物组合成新的轻质储氢体系，利用其组分间的相互作用降低体系稳定性，以实现低温下的快速放氢和部分的储放氢可逆性；又从进一步改善材料储放氢可逆性的角度出发，引入Co-B、Ni-B等具有高度氢活性且分子量适宜的金属硼化物催化剂，克服逆向储氢过程的能垒，从而设计出一类兼顾高储氢量和良好的储放氢可逆性的"配位氢化物-氨基化合物-硼化物"复合轻质储氢体系，可望适宜于燃料电池电动车的在线供氢要求。

中文关键词： 燃料电池；可逆储氢；配位氢化物；氨基化物；硼化物

英文摘要： Aiming on meeting the demands of hydrogen supply and hydroge storage for fuel cells, this project is focusing on the studies of novel light and reversible hydrogen storage materials. Herein, light coordination hydrides such as LiBH4 or NaBH4, and light amides such as LiNH2 or NaNH2, will compose novel light hydrogen storage systems, which can release hydrogen at low temperatures and show reversiblities in some degree, because the interaction between the light coordination hydrides and the light amides can reduce the stabilities of the as-composed systems. Based on the above work, some metal borides such as Co-B or Ni-B will be introduced into these systems to improve the reversibilities, because these metal borides have high activities for hydrogenation and dehydrogenation, and therefore may overcome the energy barriers for subsequent hydrogen storage processes. It is expected that the composited "coordination hydride-amide-boride" light hydrogen storage systems have high hydrogen storage capacities and good reversibilities, and are promising for the in-situ hydrogen supply for the fuel cell vehicles.

英文关键词： fuel cell; reversible hydrogen storage; coordination hydride; amide; boride