Accession Number : ADA328477

Title :   Design Synthesis and Theory of Ion Transport in a New Class of Solid Polyelectrolytes.

Descriptive Note : Final progress rept. 1 Apr 94-31 Mar 97,

Corporate Author : NORTHWESTERN UNIV EVANSTON IL DEPT OF CHEMISTRY

Personal Author(s) : Ratner, M. A. ; Shriver, D. F.

PDF Url : ADA328477

Report Date : 15 MAY 1997

Pagination or Media Count : 9

Abstract : Polyelectrolytes, where anions are covalently bonded to the backbone have unit transference number for cations and are therefore, attractive for high energy density batteries. In this project, we prepared new polyelectrolyte materials and modeled the behavior of polyelectrolytes, to understand differences between polyelectrolyte conduction and polymer/salt complex electrolyte conduction. Major results include: (1) Reduction of the basicity of the anion in a polyelectrolyte by the development of aluminosilicate polyelectrolyte materials. (2) Development of nanocomposite polyelectrolytes, consisting of a polymer intercalated into clay materials. Demonstration that conduction in these materials is limited both by tortuosity effects and by the inherent mobility of the ion in the polymer. (3) Modeling demonstrates clearly that polyelectrolyte conduction will be reduced compared to polymer/salt complex electrolyte production, both because of the lack of anion mobility and because of higher average barriers due to rigidity of the polyanionic structure. We suggested a number of structural modifications that are likely to increase polyelectrolyte conduction.

Descriptors :   *POLYELECTROLYTES, CATIONS, ELECTRICAL CONDUCTIVITY, HIGH DENSITY, BATTERY CHARGERS, ANIONS, ION EXCHANGE, ELECTRON MOBILITY, PHOSPHAZENE, MONTMORILLONITE.

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE