Modeling Lithium Diffusion in Nickel Composite Graphite

Author(s)

Venkat R. Subramanian, University of South Carolina - Columbia
Ping Yu, University of South Carolina - Columbia
Branko N Popov, University of South Carolina - ColumbiaFollow
Ralph E. White, University of South Carolina - ColumbiaFollow

Document Type

Article

Abstract

A simple theoretical model is presented to simulate the galvanostatic discharge behavior of the Ni-composite graphite electrode. The discharge profiles predicted by using a constant diffusion coefficient (CDC) and by a varied diffusion coefficient (VDC) are compared in this paper. The results show that, the VDC model can be simplified to the CDC for discharge rates less than 2C for a 5 μm particle. Also, an approximate analytical solution is presented for VDC model, which is found to be valid for discharge rates up to 6C. Exchange current and diffusion coefficient for the lithium-diffusion are predicted.

Publication Info

Published in Journal of Power Sources, Volume 96, Issue 2, 2001, pages 396-405.

Rights

Copyright Elsevier, 2001.

Subramanian, V. R., Yu, P., Popov, B. N., & White, R. E. (15 June 2001). Modeling Lithium Diffusion in Nickel Composite Graphite. Journal of Power Sources, 96 (2), 396 – 405. http://dx.doi.org/10.1016/S0378-7753(00)00657-1