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Effects of rapid quenching on structure and electrochemical characteristics of La_(0.5)Ce_(0.2)Mg_(0.3)Co_(0.4)Ni_(2.6-x)Mn_x(x=0-0.4) electrode alloys 被引量:3

Effects of rapid quenching on structure and electrochemical characteristics of La_(0.5)Ce_(0.2)Mg_(0.3)Co_(0.4)Ni_(2.6-x)Mn_x(x=0-0.4) electrode alloys
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摘要 The La-Mg-Ni system PuNi3-type La0.5Ce0.2Mg0.3Co0.4Ni2.6-xMnx(x=0,0.1,0.2,0.3,0.4) hydrogen storage alloys were prepared by casting and rapid quenching. The effects of the rapid quenching on the structure and electrochemical characteristics of the alloys were studied. The results obtained by XRD,SEM and TEM indicate that the as-cast and quenched alloys mainly consist of two major phases,(La,Mg)Ni3 and LaNi5,as well as a residual phase LaNi. The rapid quenching does not exert an obvious influence on the phase composition of the alloys,but it leads to an increase of the LaNi5 phase and a decrease of the(La,Mg)Ni3 phase. The as-quenched alloys have a nano-crystalline structure,and the grain sizes of the alloys are in the range of 20-30 nm. The results by the electrochemical measurements indicate that both the discharge capacity and the high rate discharge(HRD) ability of the alloy first increase and then decrease with the variety of quenching rate and obtain the maximum values at the special quenching rate which is changeable with the variety of Mn content. The rapid quenching significantly improves the cycle stabilities of the alloys,but it slightly impairs the activation capabilities of the alloys. The La-Mg-Ni system PuNi3-type La0.5Ce0.2Mg0.3Co0.4Ni2.6-xMnx(x=0, 0.1, 0.2, 0.3, 0.4) hydrogen storage alloys were prepared by casting and rapid quenching. The effects of the rapid quenching on the structure and electrochemical characteristics of the alloys were studied. The results obtained by XRD, SEM and TEM indicate that the as-cast and quenched alloys mainly consist of two major phases, (La,Mg)Ni3 and LaNis, as well as a residual phase LaNi. The rapid quenching does not exert an obvious influence on the phase composition of the alloys, but it leads to an increase of the LaNi5 phase and a decrease of the (La, Mg)Ni3 phase. The as-quenched alloys have a nano-crystalline structure, and the grain sizes of the alloys are in the range of 20-30 nm. The results by the electrochemical measurements indicate that both the discharge capacity and the high rate discharge(HRD) ability of the alloy first increase and then decrease with the variety of quenching rate and obtain the maximum values at the special quenching rate which is changeable with the variety of Mn content. The rapid quenching significantly improves the cycle stabilities of the alloys, but it slightly impairs the activation capabilities of the alloys.
出处 《中国有色金属学会会刊:英文版》 CSCD 2009年第2期364-371,共8页 Transactions of Nonferrous Metals Society of China
基金 Project(2006AA05Z132) supported by the Hi-tech Research and Development Program of China Project(50701011) supported by the National Natural Science Foundation of China Project(200711020703) supported by the Natural Science Foundation of Inner Mongolia, China Project(NJzy08071) supported by Higher Education Science Research Project of Inner Mongolia, China
关键词 纳米晶结构 电极合金 电化学特性 快淬合金 LANI5 人力资源开发 快速冷却 香格里拉 La-Mg-Ni system electrode alloy rapid quenching structure electrochemical performance
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参考文献26

  • 1WILLEMS J J G, BUSCHOW K H J. A nickel metal hydride battery for electric vehicles [J]. J Less-Common Met, 1987. 129:13- 30.
  • 2OVSHINSKY S R, FETCENKO M A. ROSS J. From permanent magnets to rechargeable hydride electrodes [J]. Science, 1993, 260: 176- 181.
  • 3TSUKAHARA M, KAMIYA T, TAKAHASHI K. KAWABATA A. SAKURAI S, SHI J. TAKESHITA H T, KURIYAMA N, SAKAI T Hydrogen storage and electrode properties of V-based solid solution type alloys prepared by a thermic process [J]. J Electrochem Soc. 2000. 147:2941 2944.
  • 4SUN D L, ENOKI H, GINGL F, AKIBA E. New approach for synthesizing Mg-based alloys [J]. J Alloys Comp, 1999. 285: 279-283.
  • 5KADIR K, SAKAI T, UFHARA I. Synthesis and structure determination of a new series of hydrogen storage alloys: RMg2Ni9 (R=La, Ce, Pr, Nd, Sm and Gd) built from MgNi2 Laves-type layers alternating with AB5 layers [J]. J Alloys Comp. 1997, 257:115-121.
  • 6KADIR K, KURIYAMA N, SAKAI T. UEHARA I, ERIKSSON I. Structural investigation and hydrogen capacity of CaMg2Ni9: A new phase in the AB2C9 system isostructural with LaMg2Ni9[J]. J Alloys Compd, 1999,284:145 154.
  • 7KADIR K, SAKAI T, UEHARA I. Structural investigation and hydrogen capacity of YMg:Ni9 and (Y0.5Ca0.5)(MgCa)Ni9: New phases in the AB2C9 system isostructural with LaMg2Ni9[J]. J Alloys Comp, 1999, 287:264 -270.
  • 8KOHNO T, YOSHIDA H, KAWASHIMA F. INABA T, SAKAI I, YAMAMOTO M, KANDA M. Hydrogen storage properties of new ternary system alloys: La2MgNi9, La5Mg2Ni23, La3MgNi14[J]. J Alloys Comp, 2000, 311: L5-L7.
  • 9LIAO B, LEI Y Q, LU G L, CHEN L X, PAN H G, WANG Q D. The electrochemical properties of LaxMg3 ,Ni9 (x= 1.0- 2.0) hydrogen storage alloys [J]. J Alloys Comp, 2003, 356/357:746 -749.
  • 10WANG D H, LUO Y C, YAN R X, ZHANG F L, KANG L. Phase structure and electrochemical properties of La0.67Mg0.33Ni3.0-xCo1(x-0,0.25,0.5,0.75) hydrogen storage alloys [J]. J Alloys Comp. 2006,413:193 -197.

二级参考文献14

  • 1Li Ping,Wang Xinlin,Zhang Yanghuan, et al. [J]. J Alloys Comp, 2003, 354:310-314.
  • 2Coeeiantelli J M, Bernard P, Fernandez S, et al. [J]. J Alloys Comp 1997, 253-254: 642-647.
  • 3Li Ping, Zhang Yanghuang, Wang Xinlin, et al. [J]. J Power Sources, 2003, 124: 285-292.
  • 4Hu Weikang,Kim Dong-Myung,Jang Kuk-Jin,et al. [J].J Alloys Comp,1998, 269: 254-258.
  • 5Iwakura C, Ohkawa K, Senoh H, et al. [J]. J Electrochem Soc, 2002, 149: A462-A465.
  • 6Tang Rui,Liu Yongning,Zhu Jiewu, et al. [J]. J Electrochem Soc, 2004, 151: A1774-A1777.
  • 7Chartouni D, Meli F, Zuttel A, et al. [J]. J Alloys Comp, 1996, 241: 160-166.
  • 8Zhang Yanghuan,Chen Meiyan, Wan Xinlin, et al. [J].Electrochim Acta, 2004, 49: 1161-1168.
  • 9Zhang Yanghuan,Chen Meiyan, Dong Xiaoping, et al.[J]. J Alloys Comp, 2004, 376:275-281.
  • 10Su Maosung,Wu Hongrong,Wang Yungyun, et al. [J].J Alloys Comp, 2000, 302: 248-257.

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