Effect of Porosity, Thickness and Tortuosity on Capacity Fade of Anode

The graphite anode in lithium-ion batteries is vulnerable to capacity fade due to several mechanisms. Advancement in understanding of such capacity fade mechanisms has paved the way for selecting design parameters that consider these effects. This paper shows the effect of porosity, thickness, and t...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2015-06, Vol.162 (9), p.A1708-A1717
Main Authors: Suthar, Bharatkumar, Northrop, Paul W. C., Rife, Derek, Subramanian, Venkat R.
Format: Article
Language:English
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Summary:The graphite anode in lithium-ion batteries is vulnerable to capacity fade due to several mechanisms. Advancement in understanding of such capacity fade mechanisms has paved the way for selecting design parameters that consider these effects. This paper shows the effect of porosity, thickness, and tortuosity of the anode on capacity fade mechanisms. Three main capacity fade mechanisms are analyzed in this paper: (1) solid electrolyte interface (SEI) side reaction, (2) lithium plating side reactions and (3) mechanical degradation due to intercalation induced stresses. Moreover, for a given thickness and porosity of anode, the effect of porosity variation on capacity fade mechanisms is also presented.
ISSN:0013-4651
1945-7111
DOI:10.1149/2.0061509jes