Evaluation of a Ag/Ag2S reference electrode with long-term stability for electrochemistry in ionic liquids

Horwood, Corie; Stadermann, Michael

doi:10.1016/j.elecom.2018.02.005

Title: Evaluation of a Ag/Ag₂S reference electrode with long-term stability for electrochemistry in ionic liquids

Journal Article · Thu Feb 08 00:00:00 EST 2018 · Electrochemistry Communications

DOI:https://doi.org/10.1016/j.elecom.2018.02.005· OSTI ID:1430991

^[1]; Stadermann, Michael ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

We report on a reference electrode designed for use in ionic liquids, based on a silver wire coated with silver sulfide. The reference electrode potential is determined by the concentrations of Ag⁺ and S^2-, which are established by the solubility of the Ag₂S coating on the Ag wire. While potential shifts of >100 mV during an experiment have been reported when using silver or platinum wire quasi-reference electrodes, the reference electrode reported here provides a stable potential over several months of experimental use. Additionally, our reference electrode can be prepared and used in a normal air atmosphere, and does not need to be assembled and used in a glovebox, or protected from light. In conclusion, the reference electrode has been characterized by voltammetry measurements of ferrocene and cobaltocenium hexafluorophosphate, and was found to slowly drift to more positive potentials at a rate of <1 mV/day for five of the six ionic liquids investigated.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1430991

Report Number(s):: LLNL-JRNL-742242

Journal Information:: Electrochemistry Communications, Vol. 88, Issue C; ISSN 1388-2481

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Cited By (1)

Methods and Protocols for Reliable Electrochemical Testing in Post-Li Batteries (Na, K, Mg, and Ca) Dugas, Romain; Forero-Saboya, Juan D.; Ponrouch, Alexandre Chemistry of Materials, Vol. 31, Issue 21 https://doi.org/10.1021/acs.chemmater.9b02776	journal	October 2019

Figures / Tables (2)

Figure 1(p. 8)

Table 1(p. 9)

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Title: Evaluation of a Ag/Ag2S reference electrode with long-term stability for electrochemistry in ionic liquids

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