Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (10): 954-956.doi: 10.3866/PKU.WHXB19981018

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Properties of AB5-type Hydrogen Storage Alloy Electrodes

Zhang Zhao-Liang, Sun Dong-Sheng, Yang Xi-Yao   

  1. College of Chemistry and Molecular Engineering,Peking University,Beijing 100871|College Materials Science and Engineering,Shandong University of Technology,Jinan 250061
  • Received:1997-12-03 Revised:1998-04-10 Published:1998-10-15
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Abstract:

The properties of La_0.45Ce_0.2Nd_0.2Pr_0.15Ni_3.55Co_0.75 alloy electrode com-pared with those of La_0.65Nd_0.2Pr_0.15Ni_3.55Co_0.75Mn_0.4Al_0.3 have been investigated, in addition, the effects of Ce have been disscussed. The La_0.65Nd_0.2Pr_0.15Ni_3.55Co_0.75Mn_0.4 alloy electrode shows a high discharge capacity and rate capability but low cycling stability. With partial substitution for La by Ce, i.e. the La_0.45Ce_0.2Nd_0.2Pr_0.15Ni_3.55Co_0.75 alloy electrode shows a good cycling stability, which decays only 12% of maximum capacity (310 mA•h•g-1) after 300 cycles.

Key words: Hydrogen storage alloy, Metal hydride-nickel battery, Rare-earth, Cycle life