Characterization of lithium-thionyl chloride cells by impedance techniques

The main contributor to voltage drop observed on initial discharge of lithium-thionyl chloride cells is the resistance of the passive layer on the lithium anode, as can be determined from the Nyquist plot of a lithium-thionyl chloride cell. At extremely low discharge currents, initial voltage drop c...

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Bibliographic Details
Published in:Journal of power sources 2001-07, Vol.97, p.714-718
Main Authors: Walsh, F., Pozin, M., Cherniy, A., Tikhonov, K.
Format: Article
Language:English
Subjects:
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Impedance techniques
Lithium-thionyl chloride cells
Nyquist plot
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Summary:The main contributor to voltage drop observed on initial discharge of lithium-thionyl chloride cells is the resistance of the passive layer on the lithium anode, as can be determined from the Nyquist plot of a lithium-thionyl chloride cell. At extremely low discharge currents, initial voltage drop corresponds to the value found from the impedance measurements; at higher current, an empirical correction based on the experimental results is required. The dispersion in the values of the impedance parameters and thus in initial voltage drop of individual cells was analyzed. The condition of the lithium surface after assembly was shown not to be the only reason for high dispersion in impedance parameter values.
ISSN:0378-7753
1873-2755
DOI:10.1016/S0378-7753(01)00751-0