Silver/silver chloride electrode material, method for manufacturing same and electrode

Abstract

The invention discloses a silver / silver chloride electrode material and a method for manufacturing the same. The electrode material comprises, by weight, 15%-70% of silver / silver chloride powder, 1%-15% of adhesion agents and 15%-70% of alcohol and ethers diluents. The method for manufacturing the electrode material includes firstly, manufacturing the silver / silver chloride powder; secondly, adding the adhesion agents and the alcohol and ethers diluents into the silver / silver chloride powder to mix the adhesion agents, the alcohol and ethers diluents with the silver / silver chloride powder to obtain a mixture; and thirdly, mechanically grinding the mixture to obtain slurry with certain consistence for standby application. The silver / silver chloride electrode material and the method have the advantages that the adding proportion of the adhesion agents to the diluents is controlled, so that the inky or pasty silver / silver chloride slurry can be manufactured, has a high-dispersion electrochemical interface and is convenient to process, and a silver / silver chloride electrode which can meet different requirements can be manufactured by a process for coating the slurry on a substrate and molding at low pressure or hand pressure.

Description

technical field [0001] The invention relates to a silver / silver chloride electrode material, a preparation method and an electrode. Background technique [0002] Silver / silver chloride (Ag / AgCl) electrode is a common reference electrode, which has the advantages of high exchange current density, low polarization, low impedance, and constant potential. Because it can accurately detect bioelectrical signals, the Ag / AgCl electrode is a relatively mature bioelectrical recording electrode in practical applications, and has been widely used in EEG, EMG, ECG, etc. Traditional Ag / AgCl electrodes are manufactured by several methods, namely (a) electrochemically treating silver to chlorinate the surface to form a thin layer of silver chloride, (b) pressing silver and silver chloride particles to form Ag / AgCl AgCl disc electrodes, and (c) coating of Ag / AgCl conductive ink on the dielectric substrate. [0003] The excellent electrode performance of silver / silver chloride depends ...

AI Technical Summary

Problems solved by technology

Because silver chloride is non-conductive, if its ratio is excessive, the conductivity of the electrode will be affected; on the contrary, if the silver chloride is too small, it will not be able to form a uniformly dispersed silver / silver chloride active interface with silver particles microscopically, and it will Affects its low polarization electrochemical properties

[0004] In the three conventional production methods mentioned above, the electrochemical treatment of silver, usually due to the thin surface chloride layer, the surface active layer falls off or wears off after a period of use , which has a very adverse effect on the performance of the electrode; pressing and sintering the disc electrode usually requires a certain temperature and high pressure. This method strengthens the microscopic close contact and dispersion of the silver / silver chloride particles. Excellent, but the process is very cumbersome, not conducive to mass production, so the industrial application is very limited; the method of ink coating is usually used to prepare disposable electrodes, which is to disperse silver / silver chloride in a solvent, add Appropriate amount of additives, wetting agents, etc., to make conductive ink

This kind of ink can form a thin active layer after coating and drying. This method has obvious advantages in cost, but it is usually used to prepare disposable electrodes; there is no report on the preparation of solid electrodes

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