高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 129.

• Chemistry in Energy Sciences • 上一篇    下一篇

Comparative Study on the Structure and Electrochemical Properties of RE(Ni,Co,Mn,Ti)5 (RE=La,Ce,Pr,d) Alloys

ZHU Guang-Ming, LEI Yong-Quan, CHEN Li-Xin, YANG Xiao-Quang, WANG Qi-Dong   

  1. 1. Department of Chemistry, Xiamen University, Xiamen 361005;
    2. Department of Materials Science and Engineering, Zhejiang University, Hangzho 310027
  • 出版日期:2000-12-31 发布日期:2000-12-31
  • 基金资助:

    This work was supported by National Science Foundation of China.

Comparative Study on the Structure and Electrochemical Properties of RE(Ni,Co,Mn,Ti)5 (RE=La,Ce,Pr,d) Alloys

ZHU Guang-Ming, LEI Yong-Quan, CHEN Li-Xin, YANG Xiao-Quang, WANG Qi-Dong   

  1. 1. Department of Chemistry, Xiamen University, Xiamen 361005;
    2. Department of Materials Science and Engineering, Zhejiang University, Hangzho 310027
  • Online:2000-12-31 Published:2000-12-31
  • Contact: 21
  • Supported by:

    This work was supported by National Science Foundation of China.

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摘要：

As main composition of mishmetals, the four pure light lanthanide elements La, Ce,Pr or Nd was used individually instead of Ml or Mm as RE in preparation of AB5 typed hydrogen storage alloy RE(Ni,Co,Mn,Ti)5. The four alloys, La(Ni,Co5Mn,Ti)5, Ce(Ni,Co>ln,Ti)5, Pr(Ni,Co,Mn,Ti)5 and Nd(Ni,Co,Mn,Ti)5 were then tested, characterized and compared in the their cell volumes (Vcell), P-C-T curves, and mainly electrochemical characteristics against charge/discharge cycles, including the activation cycle number (na),the maximum discharge opacity at 50 mA/g charge/discharge rate (C50,max), the high-rate-dischargeability and the rate of decay (-dC/dn). These properties are compared and analyzed to reveal the difference of the effects of each element on the electrochemical properties of rare earth based AB5 typed hydrogen storage alloy.

Abstract:

As main composition of mishmetals, the four pure light lanthanide elements La, Ce,Pr or Nd was used individually instead of Ml or Mm as RE in preparation of AB5 typed hydrogen storage alloy RE(Ni,Co,Mn,Ti)5. The four alloys, La(Ni,Co5Mn,Ti)5, Ce(Ni,Co>ln,Ti)5, Pr(Ni,Co,Mn,Ti)5 and Nd(Ni,Co,Mn,Ti)5 were then tested, characterized and compared in the their cell volumes (Vcell), P-C-T curves, and mainly electrochemical characteristics against charge/discharge cycles, including the activation cycle number (na),the maximum discharge opacity at 50 mA/g charge/discharge rate (C50,max), the high-rate-dischargeability and the rate of decay (-dC/dn). These properties are compared and analyzed to reveal the difference of the effects of each element on the electrochemical properties of rare earth based AB5 typed hydrogen storage alloy.

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