Hydrogen storage properties of LiBH4–Li3AlH6 composites
Hydrogen storage properties of LiBH4–Li3AlH6 composites
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LiBH4·Li3AlH6复合材料的储氢性能
DOI：
10.1016/j.jallcom.2011.12.054
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发表时间：
2012-03
影响因子：
6.2
通讯作者：
Yan, Mi
中科院分区：
文献类型：
--
作者：
Li, Shouquan;Ge, Hongwei;Chen, Lixin;Yan, Mi
为了改善LiBH4的脱氢性能，采用机械球磨法制备了LiBH4-Li3AlH6储氢体系。采用热重分析(TG)、差示扫描量热分析(DSC)、质谱分析(MS)、粉末X射线衍射(XRD)和傅立叶变换红外光谱(FTIR)研究了LiBH4-Li3AlH6(摩尔比为1：1)复合材料的脱氢/再加氢性能。实验结果表明，该催化剂的脱氢能力可达8.5wt%，整个脱氢过程为三步反应：(1)在160℃下发生分解反应Li3AlH6→3LiH+Al+3/2H2；(2)在300℃~350℃形成中间产物，然后转化为Al、AlB2和H2。(2LiBH4+Al→[Li2B2AlH4]→x(AlB2+2LiH+3H2)+(1−x)[Li2B2AlH4]，(0<；x<；1))；和(3)LiH+Al→LiAl+1/2H2的最终脱氢，剩余中间体(1−x)[Li2B2AlH4]→(1−x)(AlB2+2LiH+3H2)，(0<；x<；1))。此外，脱氢产物在8 Mpa H2和400°C下可二次加氢生成LiBH4。
To improve the dehydrogenation properties of LiBH4, a novel hydrogen storage system, LiBH4–Li3AlH6, was synthesized by mechanical ball milling. The dehydrogenation/rehydrogenation properties of LiBH4–Li3AlH6(molar rato: 1:1) composites were studied via thermogravimetry (TG), differential scanning calorimetry (DSC), mass spectral analysis (MS), powder X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The experimental results show that the hydrogen desorption capacity reaches 8.5wt% and that the whole dehydrogenation is a three-step process: (1) a decomposition reaction Li3AlH6→3LiH+Al+3/2H2, occurring at 160°C; (2) formation of an intermediate product from 300°C to 350°C, and then subsequent transformation into Al, AlB2, and H2. (2LiBH4+Al→[Li2B2AlH4]→x(AlB2+2LiH+3H2)+(1−x) [Li2B2AlH4], (0<x<1)); and (3) final dehydrogenation of LiH+Al→LiAl+1/2H2, occurring at 415°C, with sequential decomposition of the remaining intermediate ((1−x)[Li2B2AlH4]→(1−x)(AlB2+2LiH+3H2), (0<x<1)). Furthermore, the dehydrogenated products can be rehydrogenated to LiBH4 at 8MPa H2and 400°C.
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影响因子：
32.5
作者：
Xue-li Zheng;Guotao Wu;Wen Li;Zhitao Xiong;Teng He;Jianping Guo;Hua Chen;Ping Chen
通讯作者：
Xue-li Zheng;Guotao Wu;Wen Li;Zhitao Xiong;Teng He;Jianping Guo;Hua Chen;Ping Chen
影响因子：
7.2
作者：
Xin Wang;Y. Bei;X. C. Song;G. Fang;Shuang Li;C. P. Chen;Qiyuan Wang
通讯作者：
Xin Wang;Y. Bei;X. C. Song;G. Fang;Shuang Li;C. P. Chen;Qiyuan Wang
影响因子：
6.2
作者：
Xinhua Wang;Rugan Chen;Yan Zhang;Changpin Chen;Qidong Wang
通讯作者：
Xinhua Wang;Rugan Chen;Yan Zhang;Changpin Chen;Qidong Wang
影响因子：
6.2
作者：
J. Jang;J. Shim;Y. Cho;Byeong-Joo Lee
通讯作者：
J. Jang;J. Shim;Y. Cho;Byeong-Joo Lee
影响因子：
6.2
作者：
A. Ampoumogli;T. Steriotis;P. Trikalitis;D. Giasafaki;E. Bardají;M. Fichtner;G. Charalambopoulou
通讯作者：
A. Ampoumogli;T. Steriotis;P. Trikalitis;D. Giasafaki;E. Bardají;M. Fichtner;G. Charalambopoulou