文章摘要
Zn(BH4)2-LiNH2复合储氢材料的制备及储氢性能
Preparation and dehydrogenation properties of Zn(BH4)2–LiNH2 hydrogen storage material
  
DOI:
中文关键词: 储氢材料  机械球磨  放氢性能
英文关键词: hydrogen storage material  mechanical ball-milling  hydrogenation properties
基金项目:湖南省自然科学基金重点资助项目(10JJ2037)
作者单位
何轶伦,杨宝刚,李松林,姜圆圆,王行 中南大学 粉末冶金国家重点实验室湖南 长沙 410083 
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中文摘要:
      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 H2条件下不能可逆吸氢.
英文摘要:
      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 & DSC-TGA and hydrogen storage device. The results showed that Zn(BH4)2-LiNH2 composite system melt at 116 ℃ 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-LiNH2 composite 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.
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