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Title: Constrasting conductance/viscosity relations in liquid states of vitreous and polymer solid electrolytes. Technical report

In order to contrast conductivity mechanisms in fast-ion glassy and rubbery polymer electrolytes, the liquid states of two prototypical cases were studied. Viscosity and conductivity measurements were performed on molten (as opposed to glassy) (AgCl) 0.35 (Ag(I)) 0.45 (CsCl) 0.20 and on solutions of sodium triflate in low-molecular-weight PPG (as opposed to high mw, 1,000,000 rubbery solid PPG - called PPO). Both types of system show non-Arrhenius viscosity with divergent behavior near T(g). The energetics of the conductivity processes, however, are very different. This is emphasized by reduced temperature scale (T/T(g)) plotting of (temperature-dependent) activation energies. For the polymer salt systems, as for normal molten-salt systems and aqueous solutions, conductance and viscosity energetics are comparable - the processes are coupled. Reduced-temperature plots of polymer solutions and glass-forming aqueous-solution data show the relative importance of T(g) and ion-association factors in limiting polymer-electrolyte performance.
Authors:
;
Publication Date:
OSTI Identifier:
5250795
Report Number(s):
AD-A-189378/3/XAB; TR-14
Resource Type:
Technical Report
Research Org:
Purdue Univ., Lafayette, IN (USA). Dept. of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 25 ENERGY STORAGE; ELECTROLYTES; ELECTRIC CONDUCTIVITY; VISCOSITY; ACTIVATION ENERGY; GLYCOLS; IONS; MOLECULAR WEIGHT; POLYMERS; POLYPROPYLENE; PROGRESS REPORT; REDUCTION; SALTS; SODIUM; SOLID ELECTROLYTES; WATER; ALCOHOLS; ALKALI METALS; CHARGED PARTICLES; CHEMICAL REACTIONS; DOCUMENT TYPES; ELECTRICAL PROPERTIES; ELEMENTS; ENERGY; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; METALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POLYOLEFINS 400400* -- Electrochemistry; 250903 -- Energy Storage-- Batteries-- Materials, Components, & Auxiliaries