| 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. |
| 关键词: 储氢材料 机械球磨 放氢性能 |
| DOI： |
| 分类号: |
| 基金项目:湖南省自然科学基金重点资助项目（10JJ2037） |
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| Preparation and dehydrogenation properties of Zn(BH4)2–LiNH2 hydrogen storage material |
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| Abstract: |
| 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. |
| Key words: hydrogen storage material mechanical ball-milling hydrogenation properties |
