Development and comparison of various rod-shaped mini-reference electrode compositions based on Ag/AgCl for potentiometric applications

An all-solid liquid-metal-fiber-mat-based membrane flexible reference electrode (LMFM-FRE) was developed by combining liquid metal eutectic gallium indium (EGaIn) and poly(styrene-block-butadiene-block-styrene) (SBS) as a liquid junction layer. Ag ink was printed and chlorinated by electroplating to form the AgCl layer. Then, agarose containing KCl was coated as the electrolyte layer, and LMFM was added as the liquid junction layer. The liquid junction layer can increase the hydrophobicity of the electrode surface, limit the loss of internal Cl–, and significantly improve the stability of the electrode. The potential fluctuation of LMFM-FRE does not exceed 1 mV within 1 h, and it is still the same after 1 month. In addition, its potential changes in ion species and concentration, pH value, and ambient light are small, and its cyclic voltammetry characteristics are consistent with the standard reference electrode. Even in the case of temperature change and mechanical deformation, the potential change of LMFM-FRE is minimal. In general, the materials used and fabrication by inkjet printing make it possible to manufacture the reference electrode on a large scale, which is particularly important in many electrochemical sensing fields.

show abstract

“…The maximum fluctuation of LMFM-FRE in 1 day was 2 mV. Compared with the previous study, the RE performed enhanced potential stability.…”

Section: Resultsmentioning

confidence: 57%

Liquid Metal Fiber Mat as a Highly Stable Solid-State Junction for Inkjet-Printed Flexible Reference Electrodes

et al. 2022

View full text Add to dashboard Cite

show abstract

Fibrous Ag/AgCl Reference Electrode Guided by Failure Analysis for Real-Time Wearable Sweat Analysis

Shen

Tang

et al. 2023

IEEE Sensors J.

View full text Add to dashboard Cite

Development and comparison of various rod-shaped mini-reference electrode compositions based on Ag/AgCl for potentiometric applications

Abstract: Several fundamentally similar, miniaturized solid-state reference electrode designs, their fabrication and comparison was described in this article. All electrodes were based on Ag/AgCl as their reference element. The best electrode...

Cited by 2 publications

References 38 publications

Liquid Metal Fiber Mat as a Highly Stable Solid-State Junction for Inkjet-Printed Flexible Reference Electrodes

Liquid Metal Fiber Mat as a Highly Stable Solid-State Junction for Inkjet-Printed Flexible Reference Electrodes

Fibrous Ag/AgCl Reference Electrode Guided by Failure Analysis for Real-Time Wearable Sweat Analysis

Contact Info

Product

Resources

About