Al-LiBH4复合材料的制备与产氢性能  

Preparation and Hydrogen Generation for Al-LiBH_4 Composite Materials

作　　者：刘昊[1,2] 徐芬[3] 孙立贤[3,2] 曹忠[1] 周怀营[3] 

机构地区：[1]长沙理工大学化学与生物工程学院,长沙410004 [2]中国科学院大连化学物理研究所材料热化学实验室,大连116023 [3]桂林电子科技大学材料科学与工程学院,桂林541004

出　　处：《高等学校化学学报》2013年第8期1953-1958,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21173111,51071081,51071146,21075011);国家“九七三”计划项目(批准号:2010CB631303,2012BAD31B08)资助

摘　　要：采用机械球磨法制备了Al-LiBH4系列铝基复合材料.该材料的产氢性能和X射线衍射(XRD)分析结果表明,反应温度升高有利于金属铝和LiBH4之间的相互促进作用,提高材料的氢气产量及产率.常温下该复合材料与水反应迅速,氢气产量高.球料比30∶1、球磨5 h制备的Al-25%LiBH4复合材料30 min内每克材料可以产生720 mL氢气;当反应温度升高至90℃时,在30 min内的氢气产量高达2026 mL/g,氢气产率达95%;而在90℃反应时Al-30%LiBH4材料的氢气产量为2211 mL/g,氢气产率在96%以上.Al-LiBH4 composite materials were prepared by the mechanical ball milling. The results of the hy- drogen-production curves and X-ray diffraction patterns show that when the reaction temperature is higher, the mutual promotion effect between aluminum and LiBH4 will be more intensed, and the generation of hydrogen will be more. The milled materials have good properties of hydrogen generation in water at room temperature, especially for the Al-25% LiBH4（ mass fraction of LiBH4 is 25% ） material milled for 5 h with a ball/material ratio of 30 ： 1, which can produce 720 mL/g hydrogen. At 90 ℃, the Al-25% LiBH4 material can produce 2026 mL/g hydrogen with the hydrogen yield of 95% while the Al-30% LiBH4 material can produce 2211 mL/g hydrogen with the hydrogen yield of 96%.

关 键 词：Al-LiBH4复合材料 微量热 制氢 机械球磨 X射线衍射 

分 类 号：O647[理学—物理化学] O614.3[理学—化学]