Abstract

A solid-state material is proposed as a substitute for the internal liquid ionic phase in electrochemical sensors. Poly(ethylene oxide) is used for an Na + sensor with NASICON as the sensitive membrane. The polymer is doped with Na + and M + (Cu +, Ag +) (metal of the electrical lead) iodides. The iodide ions tend to form complexes with 1b ions and contamination of the NASICON membrane is thus minimized. The conductivities and the kinetics of the redox reactions have been compared in detail.

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