NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Analysis of redox additive-based overcharge protection for rechargeable lithium batteriesThe overcharge condition in secondary lithium batteries employing redox additives for overcharge protection, has been theoretically analyzed in terms of a finite linear diffusion model. The analysis leads to expressions relating the steady-state overcharge current density and cell voltage to the concentration, diffusion coefficient, standard reduction potential of the redox couple, and interelectrode distance. The model permits the estimation of the maximum permissible overcharge rate for any chosen set of system conditions. Digital simulation of the overcharge experiment leads to numerical representation of the potential transients, and estimate of the influence of diffusion coefficient and interelectrode distance on the transient attainment of the steady state during overcharge. The model has been experimentally verified using 1,1-prime-dimethyl ferrocene as a redox additive. The analysis of the experimental results in terms of the theory allows the calculation of the diffusion coefficient and the formal potential of the redox couple. The model and the theoretical results may be exploited in the design and optimization of overcharge protection by the redox additive approach.
Document ID
19910063437
Document Type
Reprint (Version printed in journal)
Authors
Narayanan, S. R. (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)
Bankston, C. P. (JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1991
Publication Information
Publication: Electrochemical Society, Journal
Volume: 138
ISSN: 0013-4651
Subject Category
ENERGY PRODUCTION AND CONVERSION
Distribution Limits
Public
Copyright
Other