TITLE

Effect of copper additive on Zr0.9Ti0.1V0.2Mn0.6Cr0.05Co0.05Ni1.2 alloy anode for nickel–metal hydride batteries

AUTHOR(S)
Hariprakash, B.; Martha, S.K.; Shukla, A.K.
PUB. DATE
June 2003
SOURCE
Journal of Applied Electrochemistry;Jun2003, Vol. 33 Issue 6, p497
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Zr1-xTixV0.2Mn0.6Cr0.05Co0.05Ni1.2 (0 ⩽ x ⩽ 0.3) alloys have been characterized as metal–hydride electrodes for nickel–metal hydride batteries. Although the alloy electrodes with no Ti substitution in place of Zr exhibit a specific capacity value of 375 mA h g-1, it has been possible to enhance the specific capacity of the electrodes to 395 mA h g-1 by substituting 10% Ti in place of Zr, that is, with Zr0.9Ti0.1V0.2Mn0.6Cr0.05Co0.05Ni1.2 alloy. The specific capacity value of Zr0.9Ti0.1V0.2Mn0.6Cr0.05Co0.05Ni1.2 alloy was further enhanced to 415 mA h g-1 on copper powder addition. Interestingly, the discharge curves for the latter electrode are quite flat thus providing an advantage of constant specific energy output over the entire regime of electrode discharge. Both a.c. impedance and d.c. linear polarization studies conducted on these electrodes lead to a lower charge-transfer resistance value for the metal-hydride electrode with copper additive suggesting the electrode with copper powder additive to have a higher catalytic activity than those without copper. The electrode with the copper additive also exhibits little change in its capacity over about 100 charge–discharge cycles.
ACCESSION #
16781761

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics