A kind of nano ag-agcl solid non-polarized electrode and preparation method thereof

Abstract

The invention relates to a nano Ag-AgCl solid non-polarized electrode and a preparation method thereof. The non-polarized electrode comprises a non-polarized electrode column, an electrode column top cover, a hydrogel layer, a permeable ceramic layer and an electrode outer protective shell; The polarized electrode column includes a silver column, a nano-mixed layer of Ag and AgCl and an Ag electrode layer, and the Ag electrode layer leads out a silver wire connected with the silver column. The present invention adopts electrospinning to form a new type of electrode material nano-Ag-AgCl, and the solid non-polarized electrode produced therefrom, because the particle diameters of silver and silver chloride are nanoscale, the contact area is large, and the conductive effect is increased. The offset of the current and the internal resistance of the electrode are reduced, so that the electrode maintains a stable polarization potential in different environments. Through electrospinning, the agglomeration of particles is avoided and the mixing state of a group of electrodes can be guaranteed to be consistent during the production process, that is, the internal structure is almost the same, so that the polarization of the electrodes is infinitely close, and it can be used in complex environments in the field. Polarization potential difference.

Description

Technical field: [0001] The invention belongs to the technical field of geophysical electrical prospecting, and in particular relates to a nanometer Ag-AgCl solid non-polarized electrode and a preparation method thereof. Background technique [0002] As a sensor in the process of electrical prospecting, non-polarized electrodes are one of the key devices for measuring the earth's electric field signal. Only by controlling the range of a group of electrodes within an ideal range can the quality of the earth's electric field signal be guaranteed. Because the soil is an ion conductor, and the metal electrode is an electronic conductor, a new interface will be created when the two are in contact, and a polarization potential will be generated. The so-called non-polarized electrodes are a pair of electrodes that must have the same polarization potential in different field environments. So to do: 1. The structure of the two electrodes is completely synchronized, 2. The electrodes...

AI Technical Summary

Problems solved by technology

[0003] Common electrodes mostly use copper rods and iron rods as electrode materials. Due to the high inertness of the metal itself, electrochemical reactions easily occur on the surface of the metal, which increases the polarization potential and is not suitable for high-precision measurement.

Although the liquid non-polarization electrode reduces the range, due to the leakage of the metal salt solution, it is necessary to dig an electrode pit when using it, which makes the electrode unsuitable for long-term measurement and causes some pollution to the environment.

Copper sulfate, the earliest widely used non-polarized electrode, has the problems of low stability and short service life.

Chinese patent CN204142965U discloses a silver / silver chloride liquid non-polarized electrode. The existence of the electrode column is to control the polarization potential difference in the ideal range, but the electrolyte penetrates too fast, the working time of the electrode is short, and the longest test time does not exceed eight hours

However, the shape and size of silver and silver chloride particles are not fixed, it is difficult to ensure uniform mixing during the grinding and mixing process, and there is also the possibility of particle agglomeration. The electrodes produced in this way have unstable polarization potentials and poor measurement accuracy. ensure

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