In view of possible applications as single-ion electrolyte for lithium batteries, some aspects of the lithium form of Hyflon Ion ionomer, a sulfonic short side chain (SSC) electrolyte, have been investigated. The synthesis of the ionomer and the successive membrane preparation is reported. An appropriate methodology for the direct salification of the ionomeric membrane from the SO2F form to lithium salt, using lithium hydroxide in absence of organic solvent has been found. Utilizing these SSC lithium ionomer membranes and though a particular methodology for the dehydration of the lithium ion membrane in non-aqueous media, it has been possible to achieve an ionic conductivity of 10(-3) S cm(-1) at room temperature [W. Navarrini, S. Panero, B. Scrosati, A. Sanguineti, European Patent 1,403,958 A1 (2003)]. Surprisingly it was observed that the membrane ionic conductivity depends on the dehydration methodologies adopted. (C) 2007 Elsevier B.V. All rights reserved.
Lithiated short side chain perfluorinated sulfonic ionomeric membranes: Water content and conductivity / Walter, Navarrini; Scrosati, Bruno; Panero, Stefania; Alessandro, Ghielmi; Aldo, Sanguineti; Giuliana, Geniram. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - STAMPA. - 178:2(2008), pp. 783-788. (Intervento presentato al convegno 3rd International Conference on Polymer Batteries and Fuel Cells tenutosi a Rome, ITALY nel JUN 11-14, 2007) [10.1016/j.jpowsour.2007.09.110].
Lithiated short side chain perfluorinated sulfonic ionomeric membranes: Water content and conductivity
SCROSATI, Bruno;PANERO, Stefania;
2008
Abstract
In view of possible applications as single-ion electrolyte for lithium batteries, some aspects of the lithium form of Hyflon Ion ionomer, a sulfonic short side chain (SSC) electrolyte, have been investigated. The synthesis of the ionomer and the successive membrane preparation is reported. An appropriate methodology for the direct salification of the ionomeric membrane from the SO2F form to lithium salt, using lithium hydroxide in absence of organic solvent has been found. Utilizing these SSC lithium ionomer membranes and though a particular methodology for the dehydration of the lithium ion membrane in non-aqueous media, it has been possible to achieve an ionic conductivity of 10(-3) S cm(-1) at room temperature [W. Navarrini, S. Panero, B. Scrosati, A. Sanguineti, European Patent 1,403,958 A1 (2003)]. Surprisingly it was observed that the membrane ionic conductivity depends on the dehydration methodologies adopted. (C) 2007 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
