Surface modification of the MH electrode of the MH/Ni batteries with copper

Kai Yang*, Feng Wu, Shi Chen, Cun Zhong Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In order to increase the conductivity of the metal-hydride electrode of the MH/Ni batteries, the electrode was modified with a thin copper film using vacuum evaporate plating technology. The XRD, XPS and SEM were used to analyze the modified and unmodified electrodes. Results showed that the electrode could be modified with copper-without influence on the crystal structure of the alloy. The electrochemical performance test showed that the discharge capacity at 5 C was increased by 190 mA·h and the discharge voltage was increased by 0.12 V after the surface modification of the electrode, the resistance of the batteries was also decreased by 32.8%. Meanwhile, the inner pressure of the batteries during charging was lowered and the charging efficiency of the batteries was improved.

Original languageEnglish
Pages (from-to)1109-1112
Number of pages4
JournalBeijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
Volume25
Issue number12
Publication statusPublished - Dec 2005

Keywords

  • MH/Ni batteries
  • Metal-hydride electrode
  • Surface modification
  • Vacuum evaporate plating technology

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