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Structures and electrochemical performances of La_(0.75-x)Zr_xMg_(0.25)Ni_(3.2)Co_(0.2)Al_(0.1) (x=0-0.2) electrode alloys prepared by melt spinning 被引量：1

Structures and electrochemical performances of La_(0.75-x)Zr_xMg_(0.25)Ni_(3.2)Co_(0.2)Al_(0.1) (x=0-0.2) electrode alloys prepared by melt spinning
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摘要 The La-Mg-Ni system A2B7-type electrode alloys with nominal composition La0.75-xZrxMg0.25Ni3.2Co0.2Al0.1(x=0,0.05, 0.1,0.15,0.2)were prepared by casting and melt-spinning.The influences of melt spinning on the electrochemical performances as well as the structures of the alloys were investigated.The results obtained by XRD,SEM and TEM show that the as-cast and spun alloys have a multiphase structure,consisting of two main phases(La,Mg)Ni3 and LaNi5 as well as a residual phase LaNi2.The melt spinning leads to an obvious increase of the LaNi5 phase and a decrease of the(La,Mg)Ni3 phase in the alloys.The results of the electrochemical measurement indicate that the discharge capacity of the alloys(x≤0.1)first increases and then decreases with the increase of spinning rate,whereas for x>0.1,the discharge capacity of the alloys monotonously falls.The melt spinning slightly impairs the activation capability of the alloys,but it significantly enhances the cycle stability of the alloys. The La-Mg-Ni system A2B7-type electrode alloys with nominal composition La0.75-xZrxMg0.25Ni3.2Co0.2Al0.1（x=0,0.05, 0.1,0.15,0.2）were prepared by casting and melt-spinning.The influences of melt spinning on the electrochemical performances as well as the structures of the alloys were investigated.The results obtained by XRD,SEM and TEM show that the as-cast and spun alloys have a multiphase structure,consisting of two main phases（La,Mg）Ni3 and LaNi5 as well as a residual phase LaNi2.The melt spinning leads to an obvious increase of the LaNi5 phase and a decrease of the（La,Mg）Ni3 phase in the alloys.The results of the electrochemical measurement indicate that the discharge capacity of the alloys（x≤0.1）first increases and then decreases with the increase of spinning rate,whereas for x〉0.1,the discharge capacity of the alloys monotonously falls.The melt spinning slightly impairs the activation capability of the alloys,but it significantly enhances the cycle stability of the alloys.
作者 张羊换 赵栋梁 师颜春 祁焱 郭世海 王新林
机构地区 Department of Functional Material Research School of Material
出处 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第4期607-613,共7页 中国有色金属学报（英文版）
基金 Project(2007AA03Z227)supported by High-tech Research and Development Program of China Projects(50871050,50701011)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 High Education Science Research Project of Inner Mongolia,China
关键词 A2B7-type electrode alloy La-Mg-Ni alloy Ni-MH battery MELT-SPINNING electrochemical performance A2B7-type electrode alloy La-Mg-Ni alloy Ni-MH battery melt-spinning electrochemical performance
分类号 TG146.45 [金属学及工艺—金属材料]
  • 相关文献

参考文献18

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共引文献2

同被引文献27

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Transactions of Nonferrous Metals Society of China
2010年 第4期

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