Accession Number : ADA254816


Title :   Poly(Ethylene Oxide) Electrolytes Containing Mixed Salts


Descriptive Note : Technical rept. 31 May 1991-30 Jun 1992,


Corporate Author : PENNSYLVANIA UNIV PHILADELPHIA DEPT OF CHEMISTRY


Personal Author(s) : Yang, H ; Farrington, G C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a254816.pdf


Report Date : 12 Jun 1992


Pagination or Media Count : 25


Abstract : An unusual conductivity enhancement occurs in PEO-based ZnBr2/LiBr electrolytes of composition, XZnBr2+(1-x)LiBr(PEO) 16 with x = 0.00, 0.05, 0.50, 0.75, 1.00 in mol%. The conductivity of the mixed-salt electrolytes is higher Ow that of either pure salt electrolyte. The highest conductivity, observed for x = 0.5, is two orders of magnitude higher than that of pure LiBr(PEO) 16 and one order higher than ZnBr2(PEO) 16. In contrast, the conductivity of mixed Mg(C104)2/LiC104 electrolytes, XMg(C104) 2+(1-x)LiC104(PEO)16 where x = 0.00, 0.20, 0.50, 0.80, 1.00 in mol%, increases monotonically with the mole fraction of the higher conductivity component, LiC104(PEO)16. The conductivity and DSC results suggest that the conductivity enhancement in the ZnBr2/LiBr electrolytes results from a change in charge carrier type and concentration, whereas the conductivity change in the Mg(CIO4)2/LiC104 electrolytes arises from a change in the microscopic viscosity of the electrolytes.


Descriptors :   *CONDUCTIVITY , *SALTS , IONS , POLYMERS , CHARGE CARRIERS , OXIDES , ETHYLENE OXIDE , VISCOSITY , ELECTROLYTES , ETHYLENE , AUGMENTATION , CONTRAST


Subject Categories : Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE