Electrophoretic mobilities of cadmium hydroxide, nickel hydroxide, and silver oxide in Ni--Cd and Ag--Zn battery electrolytes

Journal Article · Sun Feb 01 04:00:00 EST 1976 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2132777· OSTI ID:7351717

Mayer, S W

Since cadmium migration damage of separators is a major cause of Ni--Cd battery failures or performance degradation, a series of electrophoretic mobility measurements was made for cadmium hydroxide suspensions in concentrated KOH battery electrolyte at several concentrations of K/sub 2/CO/sub 3/ to investigate whether electrophoresis of cadmium hydroxide could be the mechanism for migration to separators. It was found that the mobility of the cadmium hydroxide suspension in an applied electrical field is adequate to account for the observed migration of cadmium hydroxide to separators. The view that high carbonate concentrations in Ni--Cd battery electrolyte may increase cadmium migration damage of separators is consistent with these electrophoretic measurements since it was demonstrated that increasing K/sub 2/CO/sub 3/ concentration from 0.8 to 6.2 percent increased cadmium hydroxide migration by a factor of 3. Zeta potentials were calculated from the data. Similar measurements have been made for nickel hydroxide suspensions in Ni--Cd battery electrolyte at several K/sub 2/CO/sub 3/ concentrations. The results are consistent with ion probe analyses for nickel in nylon separators exhibiting considerable cadmium migration. Silver oxide mobility reached a maximum at 5.1 percent K/sub 2/CO/sub 3/ and declined at 15.8 percent K/sub 2/CO/sub 3/. 3 tables. (auth)

• Research Organization: Aerospace Corp., El Segundo, CA
• OSTI ID: 7351717
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 123:2; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALKALI METAL COMPOUNDS
BATTERY SEPARATORS
CADMIUM COMPOUNDS
CADMIUM HYDROXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELECTROPHORESIS
ENERGY STORAGE SYSTEMS
HYDROGEN COMPOUNDS
HYDROXIDES
METAL-METAL OXIDE BATTERIES
MOBILITY
NICKEL COMPOUNDS
NICKEL HYDROXIDES
NICKEL-CADMIUM BATTERIES
OXIDES
OXYGEN COMPOUNDS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
SILVER COMPOUNDS
SILVER OXIDES
SILVER-ZINC BATTERIES
TRANSITION ELEMENT COMPOUNDS