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Interfacial properties of LiTFSI and LiPF6 - based electrolytes in binary and ternary mixtures of alkylcarbonates on graphite electrodes and celgard separator / Mouad Dahbi in Industrial & engineering chemistry research, Vol. 51 N° 14 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5240–5245 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 [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