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›› 2001, Vol. 1 ›› Issue (4): 0-0.

• 4 •    

快淬Zr0.9Ti0.1(Ni,Co,Mn,V)2.1贮氢合金的结构与性能

文明芬，翟玉春，陈廉, 等   

  1. 东北大学材料与冶金学院，辽宁 沈阳110006
  • 出版日期:2001-08-20 发布日期:2001-08-20

Research of 2D Substructure Search Program for Chemical Structure Database

LIU Bing, ZHOU Jia-ju   

  1. 1. School of Material & Metall., Northeastern Univ., Shenyang, Liaoning 110004, China; 2. Inst. Met.Research, CAS, Shenyang, Liaoning 110015; 3. Inst. Changsha Min. Met.,Changsha, Hunan 410084
  • Online:2001-08-20 Published:2001-08-20

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摘要： 对比了熔体快淬合金和常规熔铸合金Zr0.9Ti0.1(Ni,Co,Mn,V)2.1的微结构和电化学性能. XRD分析表明： 熔体快淬合金在退火前后的晶体结构与铸态合金一样，都为面心立方结构，由Laves C15主相组成；随快淬速度的增加，快淬合金中的非晶成份增多. 电化学测试表明：快淬合金有较好的活化性能，经6~8次循环即可完全活化，但其最大放电容量较低，小于270 mA×h/g；而退火后的快淬合金需经30次循环才能完全活化，其最大放电容量皆为340 mA×h/g左右，高于铸态合金和退火前的快淬合金；在电流密度为300 mA/g下充放电循环，发现退火后的快淬合金循环稳定性明显高于铸态合金电极，并且随快淬速度增加，循环稳定性越好.

关键词: 锂离子电池, 正极材料, LiMn2O4, 固相分段法, Jahn-Teller效应

Abstract: The structure and electrochemical properties of Zr0.9Ti0.1(Ni,Co,Mn,V)2.1 alloys prepared by both the melt-spinning method and the conventional induction melting were investigated. XRD studies showed that Zr0.9Ti0.1(Ni,Co,Mn,V)2.1 alloys at as-cast, melt-spinning and annealing were all the face center cubic structure with Laves C15 phase, and the higher the melt-spinning rate, the more the amorphous content. The electrochemical measurements showed that melt-spinning alloys had better activity, low discharge capacity (<270 mA×h/g); but after annealed, the alloys are activated completely with 30 cycles, the capacities about 340 mA×h/g were higher than those of the as-cast and melt-spinning alloys; the annealed alloys had better cycle stability than that of the as-cast alloy, and the higher the melt-spinning rate, the more stable the alloy became.

Key words: 2D substructure search, substructure match, VF algorithm, object oriented

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