Electrochemical impedance spectroscopy of lithium-titanium disulfide rechargeable cells

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2220729· OSTI ID:6263538

Narayanan, S R; Shen, D H; Surampudi, S; Attia, A I; Halpert, G ^[1]

---

1. California Inst. of Technology, Pasadena, CA (United States). Jet Propulsion Lab.

The two-terminal alternating current impedance of lithium-titanium disulfide (Li/TiS[sub 2]) rechargeable cells has been studies as a function of frequency, state-of-charge, and extended cycling. Analysis based on a plausible equivalent circuit model for the Li/TiS[sub 2] 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 five times have been compared with the parameters of cells that have been cycled over 600 times. The findings are that the combined ohmic resistance of the electrolyte and electrodes suffers a ten-fold increase after extended cycling, while the charge-transfer resistance and diffusional impedance at the TiS[sub 2]/electrolyte interface are not significantly 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. The study demonstrate the value of electrochemical impedance spectroscopy in investigating failure mechanisms. The approach and methodology followed here can be extended to other rechargeable lithium battery system.

• OSTI ID: 6263538
• Journal Information: Journal of the Electrochemical Society; (United States), Vol. 140:7; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
LITHIUM-SULFUR BATTERIES
FAILURE MODE ANALYSIS
IMPEDANCE
BATTERY CHARGE STATE
ELECTROCHEMISTRY
FREQUENCY DEPENDENCE
MEASURING METHODS
MECHANICAL TESTS
MORPHOLOGICAL CHANGES
SPECTROSCOPY
TITANIUM SULFIDES
CHALCOGENIDES
CHEMISTRY
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
MATERIALS TESTING
METAL-NONMETAL BATTERIES
SULFIDES
SULFUR COMPOUNDS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TESTING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
250902* - Energy Storage- Batteries- Performance & Testing