Zn(BH_4)_2-LiNH_2复合储氢材料的制备及储氢性能  

Preparation and dehydrogenation properties of Zn(BH_4)_2–LiNH_2 hydrogen storage material

作　　者：何轶伦[1] 杨宝刚[1] 李松林[1] 姜圆圆[1] 王行[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《湖南科技大学学报（自然科学版）》2014年第1期93-96,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：湖南省自然科学基金重点资助项目(10JJ2037)

摘　　要：以NaBH4,ZnCl2和LiNH2为原料,机械球磨法制备Zn(BH4)2-LiNH2复合储氢材料.采用X-射线衍射(XRD)、红外光谱(FTIR)、差示扫描量热-热重分析(DSC-TGA)和扫描电镜(SEM)和吸放氢测试装置等方法表征Zn(BH4)2-LiNH2复合储氢材料的物相、键合特征、热稳定性、储氢性能和形貌.结果表明:Zn(BH4)2-LiNH2复合体系在116℃和193℃时分别发生熔化和热分解.随着放氢温度的升高,体系在150℃时放氢气量为0.015 mol/g.而在200℃时,材料的放氢量增加至0.018 mol/g,提高放氢温度对该体系的放氢动力学影响有限.循环吸氢实验发现(BH4)2-LiNH2复合体系在150℃,0.1 MPa H2条件下不能可逆吸氢.Zn（BH4 ）2 -LiNH2 hydrogen storage materials was prepared by mechanical ball-milling using NaBH4 ,ZnCl2 and LiNH2 as raw materials. The Zn （BH4 ）2 -LiNH2 hydrogen storage materials were characterized by means of X -ray diffraction （XRD ）, fourier transform infrared spectroscopy （FTIR ）, differential scanning calorimeter＆amp;DSC-TGA and hydrogen storage device.The results showed that Zn（BH4 ）2-LiNH2 composite system melt at 1 16 ℃ and decompose at 193 ℃ respectively.The composite release 0.015 mol/g gas at 150 ℃.At 200 ℃,the amount of gas capacity in Zn（BH4）2 -LiNH2composite system increase to 0.018 mol/g.It is found that enhancing the dehydrogenation temperature of Zn （BH4 ）2 -LiNH2 has limited impact on its dehydrogenation dynamics.Zn（BH4 ）2 -LiNH2 composite system is irreversible under the condition of 150 ℃and 0.1 MPa H2 .

关 键 词：储氢材料 机械球磨 放氢性能 

分 类 号：TB34[一般工业技术—材料科学与工程]