AUXILIARY ELECTRODE FOR CHARGE CONTROL OF SEALED NICKEL-CADMIUM BATTERIES.

Abstract

For platinized cloth auxiliary electrodes the quantity of electrolyte is critical; with too little electrolyte the O2 reduction polarization curve is concave upward, with too much it shows a good plateau and voltage at low currents, but falls off prematurely and sharply. For VCB or WCB Black the optimum amount is about 0.13 = .01 gram of 30% KOH per square inch. Contamination by CO2 adversely affects performance, but with the optimum quantity of KOH,conversion of 30 equivalent % to carbonate can be tolerated. As O2 reduction electrodes unplatinized cloths are only 1/5 5o 1/10 as good as platinized ones. Platinized cloths moistened with 30% KOH catalyze the H2 plus O2 reaction at a moderate rate. Techniques have been worked out for modifying commercial hermetically sealed cells to allow incorporation of cloth auxiliary electrodes. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 14, 1965
Accession Number
AD0466291

Entities

People

  • Philip F. Grieger

Tags

DTIC Thesaurus Topics

  • Carbonates
  • Chemical Compounds
  • Contamination
  • Conversion
  • Electrodes
  • Electrolytes
  • Nickel Cadmium Batteries
  • Polarization

Readers

  • Battery Technology and Engineering
  • Materials Science
  • Spectroscopy.