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 / C. Arbizzani;F. De Giorgio;L. Porcarelli;M. Mastragostino;V. Khomenko;V. Barsukov;D. Bresser;S. Passerini. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - STAMPA. - 238:(2013), pp. 17-20. [10.1016/j.jpowsour.2013.03.052]
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
