Changes in alkaline electrolyte concentration and its effect on the open-circuit potentials in the nickel--cadmium cell

Journal Article · Sat Oct 01 04:00:00 EDT 1977 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2133096· OSTI ID:5010244

Halpert, G ^[1]; May, L

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1. NASA Goddard Space Flight Center, Greenbelt, MD

In the electrode reactions of the nickel--cadmium cell there is an interchange of H/sub 2/O and OH/sup -/ at the electrodes, depending on whether the cell has been charged or discharged. The calculations described below are based on a reaction involving KOH adsorption/desorption. The results from experimental cells are found to be consistent with this model. Electrolyte concentrations are calculated for different states of charge of a cell where the effect of precharge is considered. The open-circuit potentials (negative, positive, and cell) are calculated for various KOH concentrations (10.3 to 45.2%) and temperatures (0 to 40/sup 0/C). The calculated temperature coefficient for the cell potential is found to be -0.45 mV/deg, which is comparable to that found in previous experiments.

• OSTI ID: 5010244
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 124:10; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
250903 -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ADSORPTION
ALKALI METAL COMPOUNDS
CHEMICAL REACTIONS
DESORPTION
ELECTRIC BATTERIES
ELECTRIC POTENTIAL
ELECTROCHEMICAL CELLS
ELECTROLYTES
ENERGY STORAGE SYSTEMS
HYDROGEN COMPOUNDS
HYDROXIDES
MEDIUM TEMPERATURE
METAL-METAL OXIDE BATTERIES
NICKEL-CADMIUM BATTERIES
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
QUANTITY RATIO
SORPTION
TEMPERATURE DEPENDENCE
WATER