CN-121978175-A - Electrochemical testing device suitable for single working electrode system

Abstract

The invention belongs to the field of electrochemical testing, and in particular relates to an electrochemical testing device suitable for a single-working electrode system, which comprises a tank body, a working plate and a compacting plate which are connected in sequence, an electrolyte cavity is arranged in the tank body and used for containing various electrolyte solutions, the electrolyte solutions contact the working electrode through a working electrode communication hole of the working plate, and the working electrode arranged on the outer side of the working electrode communication hole is pressed and fixed through a pressing plate. The distance between the working plate and the pressing plate can be adjusted through four groups of adjusting bolts and adjusting nuts, and the pressing plate is parallel to the back of the working sample and can adapt to working electrodes with various shapes and sizes. The invention has stable structure, is convenient for assembling and replacing solution and clamping electrodes, and is suitable for electrochemical tests under single working electrode systems such as alternating current impedance spectrum, linear polarization scanning and the like of systems such as metals, coatings and the like.

Inventors

• MA CHAO
• ZHANG CHENGXIANG
• WANG BO
• QU LIJIE
• YU MEI
• LI CHUANMING
• WU YANLIN
• WANG CHUNQI
• XIAO JIAN
• DU YUNPENG
• ZHANG LIN
• WANG SHI

Assignees

• 中信戴卡股份有限公司
• 北京航空航天大学

Dates

Publication Date

20260505

Application Date

20260205

Claims (7)

1. 1. An electrochemical testing device suitable for a single working electrode system is characterized by comprising a tank body, a working plate, a pressing plate, a working electrode communication hole, an electrolytic cell cover and a clamping groove; the middle of the tank body is provided with a cuboid electrolyte cavity, the top of the tank body is provided with a concave clamping groove, the electrolytic tank cover is arranged inside the clamping groove, and the electrolytic tank cover is provided with an auxiliary electrode placing hole and a reference electrode placing hole; One side of the groove body is connected with one end of a working plate, the other end of the working plate is connected with a compression plate, and a compression bolt is arranged in the center of the compression plate; The upper end of the outer side of the working plate is provided with a groove, and the center of the working plate is provided with a working electrode communication hole.
2. 2. An electrochemical test device for a single working electrode system according to claim 1, wherein the upper outer end of the working plate is provided with a recess.
3. 3. An electrochemical test device adapted for use in a single working electrode system as claimed in claim 1, wherein a gasket groove is provided outside the working electrode communication hole.
4. 4. An electrochemical test device for a single working electrode system according to claim 1, wherein the working plate and the compression plate are connected by four sets of adjustment bolts and adjustment nuts.
5. 5. An electrochemical test device for a single working electrode system according to claim 4, wherein the adjusting bolt and the adjusting nut are made of stainless steel.
6. 6. An electrochemical test device for a single working electrode system according to claim 1, wherein the compression bolt is polytetrafluoroethylene.
7. 7. The electrochemical testing device of claim 1, wherein the housing and the pressure plate are made of acrylic.

Description

Electrochemical testing device suitable for single working electrode system Technical Field The invention belongs to the field of electrochemical testing, and particularly relates to an electrochemical testing device suitable for a single-working electrode system. Background In electrochemical studies, tests such as alternating current impedance spectroscopy and linear polarization scanning are typically performed using a single working electrode system. A three-electrode system consisting of a working electrode, a reference electrode and an auxiliary electrode is required to be used in the test process, and the three-electrode system is required to be soaked in an electrolyte solution. Thus, electrochemical test devices suitable for use in single working electrode systems generally need to include a chamber for containing an electrolyte solution and a structure for fixing the three electrode system, and it is necessary to ensure that the three electrode system maintains a certain positional relationship at the time of installation, for example, the working electrode and the auxiliary electrode need to be parallel and opposite, the reference electrode generally needs to be placed in a rujin capillary, the end of the rujin capillary and the surface of the working electrode need to be kept close to but not in contact, and the like. The existing electrochemical testing device under a single working electrode system has the problems of complex structure and insufficient sealing performance in actual use, which can lead to larger fluctuation of electrochemical testing data. And when the electrode clamping is unstable, not only the metal sample is difficult to fix, but also the effective area of the working electrode is difficult to keep consistent. Some existing testing devices also have the problem of poor adaptability to the shape and the size of the electrode, and usually require sample embedding pretreatment on the working electrode, so that the operation complexity is increased, and some samples which cannot be embedded are more difficult to test. In addition, the electrolyte solution replacement operation is involved in the test, and when the electrolyte solution is replaced by some existing test devices, the operation is complex, the replacement speed is low, and the test efficiency is affected. Therefore, there is a need to develop an electrochemical testing device suitable for a single working electrode system, which has a simple and stable structure, is convenient to assemble, replace solution and clamp electrodes, and achieves convenient, stable and reliable testing performance. Disclosure of Invention The invention provides an electrochemical testing device suitable for a single-working electrode system, which aims to solve the problems of complex structure and insufficient sealing performance of the electrochemical testing device in the prior art. In order to achieve the above purpose, the invention proposes the following technical scheme: an electrochemical testing device suitable for a single working electrode system comprises a tank body, a working plate, a pressing plate, a working electrode communication hole, an electrolytic cell cover and a clamping groove; the middle of the tank body is provided with a cuboid electrolyte cavity, the top of the tank body is provided with a concave clamping groove, the electrolytic tank cover is arranged inside the clamping groove, and the electrolytic tank cover is provided with an auxiliary electrode placing hole and a reference electrode placing hole; One side of the groove body is connected with one end of a working plate, the other end of the working plate is connected with a compression plate, and a compression bolt is arranged in the center of the compression plate; The upper end of the outer side of the working plate is provided with a groove, and the center of the working plate is provided with a working electrode communication hole. Preferably, a groove is formed in the upper end of the outer side of the working plate. Preferably, a gasket groove is provided outside the working electrode communication hole. Preferably, the working plate and the compression plate are connected through four groups of adjusting bolts and adjusting nuts. Preferably, the adjusting bolt and the adjusting nut are made of stainless steel. Preferably, the compression bolt is made of polytetrafluoroethylene. Preferably, the groove body and the compacting plates are made of acrylic. The invention has the advantages that: the invention provides an electrochemical testing device suitable for a single working electrode system, which comprises a tank body, a working plate and a pressing plate, wherein an electrolyte cavity is arranged in the tank body to contain various electrolyte solutions, the electrolyte solutions contact with a working electrode through a working electrode communication hole of the working plate, and the working electrode arranged at the outer side of the work