[article]
Titre : |
Interfacial properties of LiTFSI and LiPF6 - based electrolytes in binary and ternary mixtures of alkylcarbonates on graphite electrodes and celgard separator |
Type de document : |
texte imprimé |
Auteurs : |
Mouad Dahbi, Auteur ; David Violleau, Auteur ; Fouad Ghamouss, Auteur |
Année de publication : |
2012 |
Article en page(s) : |
pp. 5240–5245 |
Note générale : |
Industrial chemistry |
Langues : |
Anglais (eng) |
Mots-clés : |
Adsorption Electrolytes |
Résumé : |
For a better understanding of the adsorption behavior of alkylcarbonate-based electrolytes on graphite electrodes and Celgard separator for Li-ion batteries applications, the interface parameters are determined by contact angle and surface tension measurements. The correlation between these parameters and chemical compositions made of alkyl carbonate with a varying nature of lithium salts (LiPF6 and LiTFSI) and volume fractions of binary and ternary mixtures containing propylene carbonate (PC), ethylene carbonate (EC), and dimethyl carbonate (DMC) is investigated. From the obtained contact angle and surface tension (γL) values for each liquid, the dispersive and polar components of the surface tension (γLd and γLp) of the electrolyte and interfacial free energy between the solid and liquid (γSL) were then calculated using the Young’s equation. The variation of contact angle (θ) and the surface tension, as well as the work of adhesion (WA) of binary PC/DMC mixtures on PP, PE, and PET model surfaces were also measured and commented as function of volume fraction of PC in DMC. Finally, the Zisman’s critical surface tension (γC) for studied surfaces was then obtained showing positives slopes of cos θ versus γL. This behavior is explained by a relative higher adsorption of alkylcarbonates to the hydrogenated supports or graphite. These results are decisive to understand the performance of electrolyte/electrode material/separator interfaces in lithium-ion battery devices. |
ISSN : |
0888-5885 |
En ligne : |
http://pubs.acs.org/doi/abs/10.1021/ie203066x |
in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5240–5245
[article] Interfacial properties of LiTFSI and LiPF6 - based electrolytes in binary and ternary mixtures of alkylcarbonates on graphite electrodes and celgard separator [texte imprimé] / Mouad Dahbi, Auteur ; David Violleau, Auteur ; Fouad Ghamouss, Auteur . - 2012 . - pp. 5240–5245. Industrial chemistry Langues : Anglais ( eng) in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5240–5245
Mots-clés : |
Adsorption Electrolytes |
Résumé : |
For a better understanding of the adsorption behavior of alkylcarbonate-based electrolytes on graphite electrodes and Celgard separator for Li-ion batteries applications, the interface parameters are determined by contact angle and surface tension measurements. The correlation between these parameters and chemical compositions made of alkyl carbonate with a varying nature of lithium salts (LiPF6 and LiTFSI) and volume fractions of binary and ternary mixtures containing propylene carbonate (PC), ethylene carbonate (EC), and dimethyl carbonate (DMC) is investigated. From the obtained contact angle and surface tension (γL) values for each liquid, the dispersive and polar components of the surface tension (γLd and γLp) of the electrolyte and interfacial free energy between the solid and liquid (γSL) were then calculated using the Young’s equation. The variation of contact angle (θ) and the surface tension, as well as the work of adhesion (WA) of binary PC/DMC mixtures on PP, PE, and PET model surfaces were also measured and commented as function of volume fraction of PC in DMC. Finally, the Zisman’s critical surface tension (γC) for studied surfaces was then obtained showing positives slopes of cos θ versus γL. This behavior is explained by a relative higher adsorption of alkylcarbonates to the hydrogenated supports or graphite. These results are decisive to understand the performance of electrolyte/electrode material/separator interfaces in lithium-ion battery devices. |
ISSN : |
0888-5885 |
En ligne : |
http://pubs.acs.org/doi/abs/10.1021/ie203066x |
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