Superior Hydrogen Absorption-Desorption Cycle Durability of Ball-Milled 82MgH2-3PrH2-15Al Composite
Superior Hydrogen Absorption-Desorption Cycle Durability of Ball-Milled 82MgH2-3PrH2-15Al Composite
复制标题
球磨 82MgH2-3PrH2-15Al 复合材料具有优异的氢吸收-脱附循环耐久性
DOI：
10.1002/slct.201903218
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发表时间：
2019
期刊：
影响因子：
2.1
通讯作者：
Zhang Qingan
中科院分区：
文献类型：
--
作者：
Zhou Jia;Lei Jingjing;Zhang Qingan
为了提高氢吸收-解吸循环耐久性，在4 MPa氢气氛下球磨82 MgH 2 - 3 PrH 2 - 15 Al（以摩尔比计）复合材料。 与球磨MgH 2样品相比，球磨复合材料表现出增强的循环稳定性。粉末X射线衍射和高分辨透射电子显微镜图像显示，球磨82 MgH 2 - 3 PrH 2 - 15 Al复合材料在初始脱氢过程中原位生成Pr 3Al 11相，在随后的吸放氢循环过程中该相保持不变。 Pr 3Al 11纳米颗粒对82 MgH 2 - 3 PrH 2 - 15 Al复合材料的循环耐久性有利，因为它们抑制了微晶生长并阻止了Mg的表面氧化。
In order to improve hydrogen absorption‐desorption cycle durability, an 82MgH2–3PrH2–15Al (in molar ratio) composite is ball‐milled under a 4 MPa hydrogen atmosphere. The ball‐milled composite exhibits enhanced cycle stability as compared to ball‐milled MgH2sample. The powder X‐ray diffraction patterns and high‐resolution transmission electron microscopy images reveal that Pr3Al11phase is in situ formed in the initial dehydrogenation process of ball‐milled 82MgH2‐3PrH2‐15Al composite, which keeps unchanged during subsequent hydrogen absorption‐desorption cycling. The Pr3Al11nanoparticles are beneficial to cycle durability in the 82MgH2‐3PrH2‐15Al composite due to their inhibition of crystallite growth and impediment to surface oxidation for Mg.