Li-Al-B-H复合体系的储氢性能研究  

INVESTIGATION ON HYDROGEN STORAGE PROPERTIES OF Li-Al-B-H COMPOSITE

作　　者：陈如柑[1] 王新华[1] 徐楼[1] 李寿权[1] 葛红卫[1] 

机构地区：[1]浙江大学材料系,杭州310027

出　　处：《太阳能学报》2011年第7期1111-1115,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50671094);国家重点基础研究发展(973)计划(2007CB209706)

摘　　要：以LiAlH_4和LiBH_4为原料,采用球磨方法制备了Li-Al-B-H复合储氢体系,通过XRD、TG、DSC和SEM等研究手段对复合物的微观结构和性能进行表征。研究结果表明:LiAlH_4/2LiBH_4复合物加热至500℃时的放氢量达到9.7wt%,在450℃和8MPa H_2条件下的最大吸氢量达到6.8wt%。还计算了(LiAlH_4/2LiBH_4)复合物放氢反应的表观活化能,并对(LiAlH_4/2LiBH_4)复合物吸放氢反应的机理进行了讨论。Recently, metal complex hydrides like LiA1H4 and LiBH4 have become a focus item in the field of hydrogen storage material, due to their high hydrogen storage capacity. LiAIH4/2LiBH4 composite was studied. The microstructures and hydrogen storage properties are characterized by means of XRD, TG, DSC and SEM. The results showed that LiA1HJ2LiBH4 composite can release 9.7wt% of hydrogen when it is heated to 500℃. The hydrogen absorption capacity reachs 6.8wt% at 450℃ and 8MPa H2. Moreover, the activation energy of dehydrogenation reaction of （LiA1H4/2LiBH4） composite was calculated, and the hydrogenation/dehydrogenation mechanism was discussed.

关 键 词：储氢材料 配位氢化物 吸放氢性能 LiAlH4 LiBH4 

分 类 号：TG139[一般工业技术—材料科学与工程]