Silver/silver chloride electrode slice and preparation technology thereof

Abstract

The invention discloses a silver/silver chloride electrode slice and a preparation technology thereof, and belongs to the field of electrochemical sensors. The silver/silver chloride electrode slice comprises a supporting layer, a silver layer, a protection layer and a silver chloride layer. The preparation method for the silver/silver chloride electrode slice comprises plating the silver layer on the supporting layer through a vacuum silver-plating manner, then covering the protection layer on a part of the silver layer, and finally preparing the silver chloride layer through a chemical oxidation process, so as to prepare the silver/silver chloride electrode slice. The prepared silver/silver chloride electrode slice overcomes the disadvantages that a conventional silver/silver chloride electrode slice is low in precision, short in response time, bad in signal stability among batches, not suitable for organic environment and tedious in preparation technology, and the like. The silver/silver chloride electrode slice is stable in electric potential performance, high in precision, low in signal to noise ratio, low in impedance, short in response time, low in production cost, high in production efficiency and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of electrochemical sensors, in particular to a silver / silver chloride electrode sheet and a preparation process thereof. Background technique [0002] Silver / silver chloride (Ag / AgCl) electrode is a common reference electrode, which has the advantages of constant electrode potential, low polarization, low impedance, and high exchange current density. Because it can accurately detect bioelectrical signals, it has been widely used in medical EEG, ECG, and biochemical analysis dry film bioelectrical signal recording electrodes. The commonly used silver / silver chloride electrode preparation method at present, as patent CN103192070A, coats the conductive ink of silver and silver chloride on the dielectric substrate, prints and prepares silver / silver chloride electrode, or as patent CN101084829A silver and silver chloride The powder particles are mixed and pressure sintered to make a silver / silver chloride electr...

AI Technical Summary

Problems solved by technology

However, the purity of this screen-printed electrode is not high, the microstructure of silver and silver chloride is unevenly mixed, and the particles are coarse, resulting in unstable electrical numbers and large signal differences between batches, and the screen-printed electrode is not resistant Corrosion by organic solvents, not suitable for organic solvent environment, limited scope of use

In addition, powder sintered electrodes and electrochemically prepared electrodes also have the problem of poor electrode stability, and the process is cumbersome, which is not conducive to mass production

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