The performance of full cells featuring high-voltage LiNi0.4Mn1.6O4 cathode and graphite anode with carbonate-based electrolytes, ethylene carbonate (EC) -dimethyl carbonate (DMC) with conventional LiPF6 and non conventional Li[(C2F5)3PF3] (LiFAP) lithium salts with and without SEI-forming additives 1-fluoro ethylene carbonate (F1EC) and succinic anhydride (SA) is investigated. The results evidence the beneficial impact of EC-DMC-1M LiFAP electrolyte (LF30), with respect to EC-DMC-1M LiPF6 electrolyte (LP30), also in presence of 1.6 % F1EC- 2% SA additives, on charge retention over cycling and on self discharge of full cells. After the 25 cycles of the charge capability test, the charge retention reached values up to 70 % with LF30 and 87% with LF30 and additives, and fully charged cells with LF30-additives delivered 53% of the stored charge after one week in OCV.

Use of non-conventional electrolyte salt and additives in high-voltage graphite/LiNi0.4Mn1.6O4 batteries

ARBIZZANI, CATIA;DE GIORGIO, FRANCESCA;MASTRAGOSTINO, MARINA;
2013

Abstract

The performance of full cells featuring high-voltage LiNi0.4Mn1.6O4 cathode and graphite anode with carbonate-based electrolytes, ethylene carbonate (EC) -dimethyl carbonate (DMC) with conventional LiPF6 and non conventional Li[(C2F5)3PF3] (LiFAP) lithium salts with and without SEI-forming additives 1-fluoro ethylene carbonate (F1EC) and succinic anhydride (SA) is investigated. The results evidence the beneficial impact of EC-DMC-1M LiFAP electrolyte (LF30), with respect to EC-DMC-1M LiPF6 electrolyte (LP30), also in presence of 1.6 % F1EC- 2% SA additives, on charge retention over cycling and on self discharge of full cells. After the 25 cycles of the charge capability test, the charge retention reached values up to 70 % with LF30 and 87% with LF30 and additives, and fully charged cells with LF30-additives delivered 53% of the stored charge after one week in OCV.
C. Arbizzani;F. De Giorgio;L. Porcarelli;M. Mastragostino;V. Khomenko;V. Barsukov;D. Bresser;S. Passerini
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/191055
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