Capacity Trends in Nickel Electrodes as Affected by Temperature and Electrolyte Concentration
Abstract
An extensive review of the capacity trends of six representative nickel electrodes has been completed. The nickel electrodes were either taken from cells that had been successfully cycled for 40,000 simulated low Earth orbit cycles or were very new in terms of their life cycle history. One type of testing carried out on these electrodes determined their flooded capacity at four different temperatures under two different charging regimes when using two different electrolyte concentrations. The other type of testing determined the positions of the different charging peaks relative to the potential at which the co-evolution of oxygen becomes a significant factor during the charging process. The results of this study have explained why the use of certain temperatures and electrolyte concentrations can result in desirable or undesirable cell performance characteristics. The reasons behind two of the characteristic lower cell capacity phenomenon related to the use of 26% KOH vs. 31% KOH as the cell electrolyte concentration have become evident based on the results of this study.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2002
- Accession Number
- ADA417267
Entities
People
- Albert H. Zimmerman
- G. A. To
- L. H. Thaller
Organizations
- The Aerospace Corporation