Mechanism of the enhancement of discharge rate property for Nd0.8Mg0.2(Ni0.8Co0.2)3.8 hydrogen storage alloy by magnetic annealing

被引：7
|
作者：
Pan Chongchao [1 ,3 ]
Yang Shonglin [1 ]
Yu Ronghai [1 ]
Shi Ji [2 ]
Nakamura, Y. [2 ]
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, Key Lab Adv Mat, Beijing 100084, Peoples R China
[2] Tokyo Inst Technol, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan
[3] China Natl Inst Standardizat, Beijing 100088, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2010年 / 28卷 / 02期
基金：
中国国家自然科学基金;
关键词：
magnetic annealing; hydrogen storage; interstitial orientation; discharge rate property; rare earths; ELECTROCHEMICAL PROPERTIES; CHEMICAL-EQUILIBRIUM; METAL-HYDRIDES; FIELD; ELECTRODES;
D O I：
10.1016/S1002-0721(09)60098-3
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
For further improving the rate properties of Nd0.8Mg0.2(Ni0.8Co0.2)(3.8) hydrogen storage alloy, the alloy was annealed in high magnetic fields (10 T). The results showed that the electrochemical properties and magnetic properties of Nd0.8Mg0.2(Ni0.8Co0.2)(3.8) hydrogen storage alloy were considerably enhanced. And there was no change of the phase composition. The lattice constants of c and c/a ratio increased for the sample magnetically annealed, yielding uniaxial magnetic anisotropy along the c axis. The increase of c and c/a ratio enlarged interstitial volume, leading to a larger diffusion channel for hydrogen atoms, and resulted in high hydrogen storage capacity and rate properties.
引用
收藏
页码：286 / 289
页数：4
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