Transport properties of the Solid polymer electrolyte system P(EO)nLiTFSI

• Values for the lithium ion transference number (t0+)) are reported for the solid polymer electrolyte system poly(ethylene oxide) (PEO) complexed with Li(CF3SO2)2N (LiTFSI). t0+,ranges from 0.17 ± 0.17 to 0.60 ± 0.03 in the salt concentration (c) region of 742 to 2982 mol/m3 at 85 degrees C. The concentration dependence of t0+ and the molar ionic conductivity (Λ) are shown to be in good agreement with a free volume approach over the salt-rich composition range investigated. The present t0+ results were obtained using an electrochemical technique based on concentrated solution theory. This experimentally straightforward method is herein demonstrated to give accurate results for a highly concentrated SPE system, without relying on any dubious simplifications regarding the state of the electrolyte.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

TRANSFERENCE NUMBER MEASUREMENTS

POLY(ETHYLENE OXIDE)OXIDE)-LICF3SO3 SYSTEM

CONDUCTIVITY BEHAVIOR

RUBBERY ELECTROLYTES

SALT COMPLEXES

PHASE-DIAGRAMS

PEO

LICF3SO3

DIFFUSION

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