Evaluation of electrochemical interface area and lithium diffusion coefficient for a composite graphite anode

Hui Yang; Hyun Joo Bang; Jai Prakash

doi:10.1149/1.1763139

Evaluation of electrochemical interface area and lithium diffusion coefficient for a composite graphite anode

Hui Yang, Hyun Joo Bang, Jai Prakash

Illinois Institute of Technology

Research output: Contribution to journal › Article › peer-review

83 Scopus citations

Abstract

A structural model to calculate the electrochemical interface area for a composite graphite electrode is described. A new equation using the model predicted area to calculated chemical diffusion coefficient (D_Li+) eliminates the effects from fabrication such as active mass (m_B) and geometric area (S_Geo). The chemical diffusion coefficient values calculated for graphite electrodes of different thicknesses and porosities using the new equation are almost the same as expected. The values of D_Li+ in the graphite vary between 10^-11.9 and 10_-9.9 cm ₂/s over the course of the lithium deintercalation in the graphite samples.

Original language	English
Pages (from-to)	A1247-A1250
Journal	Journal of the Electrochemical Society
Volume	151
Issue number	8
DOIs	https://doi.org/10.1149/1.1763139
State	Published - 2004
Externally published	Yes

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abstract = "A structural model to calculate the electrochemical interface area for a composite graphite electrode is described. A new equation using the model predicted area to calculated chemical diffusion coefficient (DLi+) eliminates the effects from fabrication such as active mass (mB) and geometric area (SGeo). The chemical diffusion coefficient values calculated for graphite electrodes of different thicknesses and porosities using the new equation are almost the same as expected. The values of DLi+ in the graphite vary between 10-11.9 and 10-9.9 cm 2/s over the course of the lithium deintercalation in the graphite samples.",

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AB - A structural model to calculate the electrochemical interface area for a composite graphite electrode is described. A new equation using the model predicted area to calculated chemical diffusion coefficient (DLi+) eliminates the effects from fabrication such as active mass (mB) and geometric area (SGeo). The chemical diffusion coefficient values calculated for graphite electrodes of different thicknesses and porosities using the new equation are almost the same as expected. The values of DLi+ in the graphite vary between 10-11.9 and 10-9.9 cm 2/s over the course of the lithium deintercalation in the graphite samples.

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Evaluation of electrochemical interface area and lithium diffusion coefficient for a composite graphite anode

Abstract

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