Accession Number:

AD0647468

Title:

A STUDY OF HIGH CURRENT DENSITIES IN NICKEL CADMIUM BIPOLAR BATTERIES.

Descriptive Note:

Final rept.,

Corporate Author:

GULTON INDUSTRIES INC HAWTHORNE CALIF

Report Date:

1966-10-01

Pagination or Media Count:

64.0

Abstract:

Foil type electrodes with 3 mil substrates and 4 mil sinters were developed and assembled into bipolar cells and batteries. Tests were conducted to determine the effects on current and voltage for substrate thickness, sinter thickness, position of end terminals, separator thickness, and plate loading. None of these physical design parameters showed significant effects on the change in current densities. Concentration and activation polarization were the limiting parameters of current density outputs in a bipolar nickel-cadmium battery. Calculated internal impedances were in the range of 1.5 to 3.5 milliohms sq inch. However, experimentally determined internal impedances were 20 times higher. Reference electrode determinations indicate that activation polarization of the negative cadmium electrode was the most significant. Activation and concentration polarization of the positive electrode were approximately equal and account for about half of the polarization of the negative. Current densities of 12.5 amperessq in were achieved at the maximum power point of 0.6 volts per cell. Author

Subject Categories:

  • Electrochemical Energy Storage

Distribution Statement:

APPROVED FOR PUBLIC RELEASE