Hydrogen storage performance of Mg-based composites prepared by spark plasma sintering
Hydrogen storage performance of Mg-based composites prepared by spark plasma sintering
复制标题
放电等离子烧结镁基复合材料的储氢性能
DOI：
10.1016/j.jallcom.2009.06.144
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发表时间：
2009-11
影响因子：
6.2
通讯作者：
中科院分区：
文献类型：
--
作者：
本文研究了放电等离子烧结（SPS）制备的镁基复合材料的储氢能力、吸氢机理和氢化物稳定性。结果表明，复合材料具有Mg相和V基固溶体的双相组织，其烧结界面存在纳米晶镁。添加体积分数为 20% 的 V 基固溶体后，复合材料在 573K 时表现出最大可逆储氢容量为 4.2wt.%，而纯镁的可逆储氢容量几乎为零。 DSC结果表明，随着V基固溶体体积从20vol.%增加到50vol.%，MgH2的氢化物分解温度从纯Mg中的708K急剧下降到636K和591K。随着V基固溶体的添加，纯镁在573K时的吸氢动力学得到了极大的改善，其吸氢机理从表面反应控制转变为复合材料中的扩散控制。基于这些实验结果，提出了一个模型来描述这些复合材料中的氢吸收/解吸机制。
The hydrogen storage capacities, hydrogen absorption mechanism and hydride stability of Mg-based composites prepared by spark plasma sintering (SPS) were investigated in this paper. The results showed that the composites had a double-phase microstructure of Mg phase and V-based solid solution, with nanocrystalline magnesium existing at their sintering interface. With the addition of the V-based solid solution in 20% volume fraction, the composite exhibited a maximum reversible hydrogen storage capacity of 4.2wt.% at 573K, compared with that of pure Mg of almost zero. DSC results indicated that the hydride decomposition temperature of MgH2decreased sharply from 708K in pure Mg to 636K and to 591K as the volume of V-based solid solution increased from 20vol.% to 50vol.%. With the addition of V-based solid solution, the hydrogen absorption kinetics of pure Mg was greatly improved at 573K, and its hydrogen absorption mechanism changed from surface reaction control to diffusion control in the composite. Based on these experimental results, a model was put forward to describe the hydrogen absorption/desorption mechanism in these composites.
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影响因子：
6.2
作者：
M. Mintz;Y. Zeiri
通讯作者：
M. Mintz;Y. Zeiri
影响因子：
3.7
作者：
Jianfeng Mao;Zhu Wu;T. Chen;Baicheng Weng;N. Xu;T. Huang;Zaiping Guo;Huakun Liu;D. Grant;G. Walker;Xuebin Yu
通讯作者：
Jianfeng Mao;Zhu Wu;T. Chen;Baicheng Weng;N. Xu;T. Huang;Zaiping Guo;Huakun Liu;D. Grant;G. Walker;Xuebin Yu
DOI：
10.1016/j.ijhydene.2007.07.010
发表时间：
2007-12
期刊：
Fuel and Energy Abstracts
影响因子：
--
作者：
B. Singh;Gunchoo Shim;Sung-Wook Cho
通讯作者：
B. Singh;Gunchoo Shim;Sung-Wook Cho
影响因子：
6.2
作者：
Fu, Y.;Groll, M.;Kulenovic, R.
通讯作者：
Kulenovic, R.
影响因子：
6.2
作者：
Jianfeng Mao;Xuebin Yu;Zaiping Guo;Huakun Liu;Zhongdao Wu;J. Ni
通讯作者：
Jianfeng Mao;Xuebin Yu;Zaiping Guo;Huakun Liu;Zhongdao Wu;J. Ni