用快淬工艺制备了Mg2Ni型纳米晶合金,合金的成分为Mg20Ni10-xCux (x＝0,1,2,3,4).用XRD、SEM、HRTEM分析了铸态及快淬态合金的微观结构,采用程控电池测试仪测试了合金电极的电化学性能,并用自动控制的Sieverts设备测试了合金的吸放氢动力学性能.结果表明,所有的快淬态合金具有纳米晶结构,Cu替代Ni不改变合金的Mg2Ni型主相,但显著地改善了合金的电化学贮氢性能,包括放电容量和电化学循环稳定性.此外,合金的吸氢量随Cu含量的增加先上升后下降,而合金的放氢量随Cu含量的增加而增加.
参考文献
| [1] | Schlapbach L;Züttel A .[J].Nature,2001,414:353. |
| [2] | Simi(c)i(c) M V;Zduji(c) M;Dimitrijevi(c) R et al.[J].Journal of Power Sources,2006,158:730. |
| [3] | Spassov T;K(c)ster U .[J].Journal of Alloys and Compounds,1999,287:243. |
| [4] | Orimo S;Fujii H .[J].Journal of Alloys and Compounds,1996,232:L16. |
| [5] | Hong T W;Kim Y J .[J].Journal of Alloys and Compounds,2002,330-332:584. |
| [6] | Spassov T;Solsona P;Suri(n)ach S et al.[J].Journal of Alloys and Compounds,2002,345:123. |
| [7] | Song M Y;Kwon S N;Bae J S et al.[J].International Journal of Hydrogen Energy,2008,33:1711. |
| [8] | Spassov T.;Koster U. .Thermal stability and hydriding properties of nanocrystalline melt-spun Mg63Ni30Y7 alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(2):279-286. |
| [9] | Orimo S;Fujii H .[J].Applied Physics A:Materials Science and Processing,2001,72:167. |
| [10] | Tanaka K;Kanda Y;Furuhashi M et al.[J].Journal of Alloys and Compounds,1999,295:521. |
| [11] | Mulas G;Schiffini L;Cocco G .[J].Journal of Materials Research,2004,19:3279. |
| [12] | Woo J H;Lee K S .[J].Journal of the Electrochemical Society,1999,146:819. |
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