Hydrogen storage properties of flexible and porous La0.8Mg0.2Ni3.8/PVDF composite

Hydrogen storage properties of flexible and porous La0.8Mg0.2Ni3.8/PVDF composite
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柔性多孔La0.8Mg0.2Ni3.8/PVDF复合材料的储氢性能

DOI:
10.1016/j.ijhydene.2013.02.062
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发表时间:
2013-08
期刊:
Int. J. Hydrogen Energy
影响因子:
--
通讯作者:
柴玉俊
柴玉俊
中科院分区:
其他
文献类型:
--
作者:
柴玉俊

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研究了柔性多孔La0.8Mg0.2Ni3.8/PVDF(聚偏二氟乙烯)复合材料的储氢性能。在该复合材料中,PVDF 充当粘合剂连接合金粉末,(NH4)2CO3 充当造孔剂以产生空隙空间。随着PVDF含量的增加,复合材料的吸氢动力学逐渐降低。 (NH4)2CO3从1%增加到5%时,容量先增加后减少。与本征复合材料 (La0.8Mg0.2Ni3.8/1%PVDF) 相比,在 70 °C 时观察到复合材料的容量增加了 0.08–0.13 wt%。从 0 °C 到 100 °C 的温度变化,典型多孔复合材料 (La0.8Mg0.2Ni3.8/1%PVDF/3%(NH4)2CO3) 的容量增加了 0.1–0.15%。 PVDF辅助复合材料在氢化/脱氢过程中表现出柔性/固化特性,这可能会降低合金粉末的氧化并保留空隙空间。最后,十次氢化/脱氢循环后,容量仍增加了约 0.1 wt%。
A study on the hydrogen storage properties of flexible and porous La0.8Mg0.2Ni3.8/PVDF (polyvinylidene fluoride) composite was reported. In this composite, PVDF acted as a binder to connect the alloy powders and (NH4)2CO3as a pore-forming agent to create void space. Increasing PVDF content, the hydrogen absorption kinetics of the composite gradually decreased. Increasing (NH4)2CO3from 1% to 5%, the capacity firstly increased and then decreased. 0.08–0.13 wt% increased capacity for the composite was observed at 70 °C by comparison with the intrinsic composite (La0.8Mg0.2Ni3.8/1%PVDF). Varying temperature from 0 °C to 100 °C, 0.1–0.15 wt% increased capacity were obtained for the typical porous composite (La0.8Mg0.2Ni3.8/1%PVDF/3%(NH4)2CO3). The PVDF-assisted composite showed the flexible/solidified characteristic in hydriding/dehydriding, which maybe lowed down the oxidation of the alloy powders and preserved the void space. Finally, ∼0.1 wt% increased capacity remained after ten hydriding/dehydriding cycles.
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