Impedance of aerospace NiCd cells under open circuit conditions. Interim rept

Technical Report · Mon Jan 25 00:00:00 EST 1982

OSTI ID:5192917

Zimmerman, A H

The open circuit impedance of 10-A h sealed NiCd cells has been measured from 0 to 100,00 Hz as a function of cell state of charge and temperature. The open-circuit impedance at frequencies below 0.01 Hz is modeled by two consecutive diffusion-controlled charge transfer processes in the NiCd cell. Data analysis indicates that both solid-state diffusion processes and electrolyte diffusion processes are consistent with the data. Because concentration polarization is known to occur in NiCd cells, the two observed processes are tentatively assigned to electrolyte diffusion in the positive and negative plates. The resolution of these processes in the impedance spectrum is sensitive to the relative pore structure and morphology of the electrode plates.

• Research Organization: Aerospace Corp., El Segundo, CA (USA)
• OSTI ID: 5192917
• Report Number(s): AD-A-111687/0
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
NICKEL-CADMIUM BATTERIES
IMPEDANCE
BATTERY SEPARATORS
CHARGE STATE
DATA PROCESSING
DIFFUSION
ELECTRICAL PROPERTIES
ELECTRODES
ELECTROLYTES
PERFORMANCE
PLATES
SPECTRA
TEMPERATURE DEPENDENCE
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
METAL-METAL OXIDE BATTERIES
PHYSICAL PROPERTIES
PROCESSING
250902* - Energy Storage- Batteries- Performance & Testing