Advanced nanocrystalline Zr-based AB(2) hydrogen storage electrode materials for NiMH EV batteries

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	Advanced nanocrystalline Zr-based AB(2) hydrogen storage electrode materials for NiMH EV batteries
	L. Chen; F. Wu; M. Tong; D. M. Chen; R. B. Long; Z. Q. Shang; H. Liu; W. S. Sun; K. Yang; L. B. Wang; Y. Y. Li
	1999
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	293 页码:508-520
摘要	The metallurgical microstructure, crystal-structure and electrochemical properties of Laves phase Zr-V-Mn-Ni system alloys (modified with Ti, Co, Sn, etc.) were investigated systematically in the present paper. Conventional polycrystalline Zr-based alloys, which consist of cubic C15 Laves phase, hexagonal C14 Laves phase and non-laves phase (such as Zr7Ni10, Zr9Ni11, Zr(NiMn)Sn-0.35), show the highest discharge capacity of 342 mAh g(-1) (at 60 mA g(-1) charge-discharge current), which decreases by 7.8% after 300 cycles. Amorphous phase alloys in melt-spun alloys exhibit poor electrochemical properties. Advanced nanocrystalline C15-Laves single-phase alloys were prepared by completely crystallizing the melt-spun amorphous Zr1-xTix[(NiVMnCo)(1-nu)Sn-nu](2+alpha) alloys. These alloys have a special microstructure composed of high-density interface phase and random-oriented grains varying from several nanometres to several dozens of nanometres. It was found that these materials had high discharge capacity (the maximum capacity is up to 379 mAh g(-1)) and long cycle life (the capacity only decreases 3% after 300 cycles). The maximum discharge capacities were found in the metallurgical microstructure and crystal-structure in Zr-based AB(2) alloys. The maximum discharge capacity increases in regular nanocrystalline/C15-Laves single-phase>polycrystalline/multi-phase (Laves and non-laves)>comorphous state/C15-Laves single-phase. It was shown that the complete crystallization method from amorphous solids is an effective way to greatly improve the electrochemical performance of Zr-based AB(2) hydrogen storage electrode materials, which is not only significant for academic research but also valuable for practical applications in the NiMH battery system for pure electric vehicles (PEV) and hybrid electric vehicles (HEV). (C) 1999 Elsevier Science S.A. All rights reserved.
部门归属	chinese acad sci, inst met res, shenyang 110015, peoples r china. natl engn dev ctr high tech energy storage mat, zhongshan 528437, peoples r china.;chen, l (reprint author), chinese acad sci, inst met res, shenyang 110015, peoples r china
关键词	Nanocrystalline Electrode Materials Zr-based Ab(2) Hydrogen Storage Alloys Complete Crystallization Method From Amorphous Solids Metallurgical Structure And crystal-Structure Electrochemical Properties Hydriding Properties System Alloys Cr
URL	查看原文
WOS记录号	WOS:000084065500099
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37323
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Chen,F. Wu,M. Tong,et al. Advanced nanocrystalline Zr-based AB(2) hydrogen storage electrode materials for NiMH EV batteries[J]. Journal of Alloys and Compounds,1999,293:508-520.
APA	L. Chen.,F. Wu.,M. Tong.,D. M. Chen.,R. B. Long.,...&Y. Y. Li.(1999).Advanced nanocrystalline Zr-based AB(2) hydrogen storage electrode materials for NiMH EV batteries.Journal of Alloys and Compounds,293,508-520.
MLA	L. Chen,et al."Advanced nanocrystalline Zr-based AB(2) hydrogen storage electrode materials for NiMH EV batteries".Journal of Alloys and Compounds 293(1999):508-520.