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Nickel hydroxide active-material densities. Technical report

Technical Report ·
OSTI ID:7242190
The density of nickel-electrode active materials was measured in situ as a function of the state of charge and operating conditions of the nickel electrode. Sintered electrodes made by both chemical and electrochemical impregnation methods were studied, and the effects of cobalt additives on the density and compressibility of the active material were determined. The results clearly indicate a phase transition that occurs when the active material is charged above an oxidation state of about 2.7. The transition involves large changes in the density, volume, and compressibility of the active material. Changes in density during open-circuit stand, cycling, and trickle charging were measured and the results correlated with the operating characteristics of nickel electrodes in battery cells.
Research Organization:
Aerospace Corp., El Segundo, CA (USA). Chemistry and Physics Lab.
OSTI ID:
7242190
Report Number(s):
AD-A-191411/8/XAB; TR-0086A(2945-01)-3
Country of Publication:
United States
Language:
English