Determination of the Lithium Ion Diffusion Coefficient in Graphite

Author(s)

Ping Yu, University of South Carolina - Columbia
Branko N. Popov, University of South Carolina - ColumbiaFollow
James A. Ritter, University of South Carolina - ColumbiaFollow
Ralph E. White, University of South Carolina - ColumbiaFollow

Document Type

Article

Subject Area(s)

Chemical Engineering

Abstract

A complex impedance model for spherical particles was used to determine the lithium ion diffusion coefficient in graphite as a function of the state of charge (SOC) and temperature. The values obtained range from of 1.12 × 10^–10 to 6.51 × 10^–11 cm²/s at 25°C for 0 and 30% SOC, respectively, and for 0% SOC, the value at 55°C was 1.35 × 10^–10 cm²/s. The conventional potentiostatic intermittent titration technique (PITT) and Warburg impedance approaches were also evaluated, and the advantages and disadvantages of these techniques were exposed

Publication Info

Journal of the Electrochemical Society, 1999, pages 8-14.

Rights

© The Electrochemical Society, Inc. 1999. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in the Journal of the Electrochemical Society.

http://www.electrochem.org/

Publisher's link: http://dx.doi.org/10.1149/1.1391556

DOI: 10.1149/1.1391556