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Electrochemical impedance spectroscopy of lithium-titanium disulfide rechargeable cellsThe two-terminal alternating current impedance of Li/TiS2 rechargeable cells was studied as a function of frequency, state-of-charge, and extended cycling. Analysis based on a plausible equivalent circuit model for the Li/TiS2 cell leads to evaluation of kinetic parameters for the various physicochemical processes occurring at the electrode/electrolyte interfaces. To investigate the causes of cell degradation during extended cycling, the parameters evaluated for cells cycled 5 times were compared with the parameters of cells cycled over 600 times. The findings are that the combined ohmic resistance of the electrolyte and electrodes suffers a tenfold increase after extended cycling, while the charge-transfer resistance and diffusional impedance at the TiS2/electrolyte interface are not significantIy affected. The results reflect the morphological change and increase in area of the anode due to cycling. The study also shows that overdischarge of a cathode-limited cell causes a decrease in the diffusion coefficient of the lithium ion in the cathode.
Document ID
19930064855
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Narayanan, S. R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Shen, D. H.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Surampudi, S.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Attia, A. I.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Halpert, G.
(JPL Pasadena, CA, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Publication Information
Publication: Electrochemical Society, Journal
Volume: 140
Issue: 7
ISSN: 0013-4651
Subject Category
Energy Production And Conversion
Accession Number
93A48852
Distribution Limits
Public
Copyright
Other

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