Multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing

Abstract

The present invention relates to a multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing, comprising: a polytetrafluoroethylene solution cell; the polytetrafluoroethylene solution cell body is a solution cell with an internal cavity connected to each other and composed of a plurality of identical solution cell components; and the polytetrafluoroethylene solution cell is provided with a first disassembly cover at the upper end and a second disassembly cover at the lower end, and is internally loaded with a light-through and observation passage. The multifunctional in-situ online detection electrochemical cell of the present invention is provided with an optical path channel adapted for monitoring by fluorescence confocal equipment, which solves the limitation on the placement of the test sample; the present invention can observe the surface state of the working electrode in all directions by rationally arranging the structure of the electrochemical cell and the placement of the three electrodes, combined with a transparent quartz window, thereby greatly facilitating the observation of the focusing and measurement process before the test, and can simultaneously meet the test requirements of fluorescence confocal and Raman spectroscopy.

Description

Technical Field

[0001] The invention relates to the technical field of electrochemistry, and in particular to a multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing. Background Art

[0002] Electrochemical research has now reached the molecular level, but only indirect information about the system can be obtained through an electrochemical workstation. This information reflects the overall properties of the system and cannot provide data on the composition and structure of the material in the local system or during the reaction process. Fluorescence confocal imaging analysis is an advanced analytical method with the characteristics of high resolution, clear sampling, simplicity and intuitiveness. The fluorescence confocal analysis method can decompose the sample into countless points in two-dimensional or three-dimensional space, and use point light sources to scan and image point by point to achieve high-resolution imaging of the entire plane or three-dimensional space. It is of great significance for in-situ analysis of electrode changes in electrochemical reactions, can make up for the shortcomings of electrochemical workstations, and is an ideal tool for studying electrochemical reactions. Combining the in-situ fluorescence confocal imaging method with Raman spectroscopy can deeply study the electrode process and explore the reaction mechanism. However, the design of in-situ electrochemical cells is subject to many restrictions due to the interference of the fluorescence confocal signal acquisition circuit and the Raman spectrum acquisition information.

[0003] The existing electrochemical cells combining fluorescence confocal imaging and Raman spectroscopy have the following main problems:

[0004] (1) The electrolyte cannot be quantified: The amount of electrolyte used cannot usually be calibrated in the electrochemical cell;

[0005] (2) It is difficult to achieve in-situ rapid three-dimensional high-resolution imaging of electrodes. Most current electrochemical imaging technologies can only achieve two-dimensional planar imaging with low resolution.

[0006] (3) Conventional electrochemical cells do not meet the testing requirements for water and oxygen sensitive systems;

[0007] (4) Conventional electrochemical cells cannot avoid corrosion of the chemical cell body by organic electrolytes;

[0008] (5) Conventional electrochemical cells cannot achieve real-time monitoring of the electrochemical reaction process by multiple instruments at the same time.

[0009] In view of the many problems existing in the prior art, it is necessary to rationally design and layout the electrodes of the in-situ electrochemical cell combining fluorescence confocal and Raman spectroscopy, so that the incident light can be accurately focused to the position of the sample that needs to be tested during fluorescence confocal imaging analysis, while avoiding interference with the Raman spectroscopy acquisition information. Summary of the invention

[0010] The present invention aims to solve the technical problems in the prior art and provides a multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing.

[0011] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0012] The present invention provides a multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing, comprising: a polytetrafluoroethylene solution cell;

[0013] The polytetrafluoroethylene solution pool body is a solution pool composed of a plurality of identical solution pool components with interconnected internal cavities; the polytetrafluoroethylene solution pool is provided with a first disassembly cover at the upper end and a second disassembly cover at the lower end, and is provided with a light-through and observation passage inside;

[0014] The plurality of solution pool components are connected by a first groove;

[0015] The first disassembly cover is internally equipped with a second groove, and the light-through hole formed at this position is provided with an adapted quartz window, which can facilitate the injection and testing of fluorescence confocal and Raman spectroscopy lasers; the first disassembly cover also includes a first fixing channel, and the first fixing channel and the solution pool component have built-in threads at the corresponding position, so that a threaded fastening connection is formed between the first disassembly cover and the solution pool component; the two sides of the light-through hole are fixed with a counter electrode fixing block and a reference electrode fixing block, which can be used to fix the counter electrode and the reference electrode respectively;

[0016] The second disassembly cover is embedded with three pieces of conductive glass for coating or attaching electrodes, and electrode wiring holes are respectively provided at the corresponding positions of the three electrodes; the second disassembly cover also includes a second fixing hole, and the second fixing hole and the corresponding position of the solution pool component are internally threaded, so that a threaded fastening connection is formed between the second disassembly cover and the solution pool component;

[0017] The light-through and observation passage passes through the quartz window at the light-through hole, the inner cavity of the polytetrafluoroethylene solution pool and the conductive glass on the second disassembly cover, thereby facilitating the laser injection and testing of fluorescence confocal and Raman spectroscopy.

[0018] In the above technical scheme, the counter electrode and reference electrode fixed by the counter electrode fixing block and the reference electrode fixing block on the first disassembly cover respectively can form a three-electrode system of the in-situ electrochemical cell with the working electrode carried by the conductive glass on the second disassembly cover according to experimental needs; the three-electrode system is located in the cavity formed by the solution pool assembly, the first disassembly cover, and the second disassembly cover; the light hole on the first disassembly cover and the centers of the solution pool assembly and the conductive glass embedded in the second disassembly cover are on the same vertical line.

[0019] In the above technical solution, the three pieces of conductive glass embedded in the second disassembly cover can carry different coatable or fixed electrode materials and serve as carriers of the counter electrode, the working electrode and the reference electrode to form a three-electrode system and realize direct real-time monitoring of the three electrodes; the conductive glass is embedded with electrode wires which are led out from the electrode wiring holes on the second disassembly cover to connect to the electrochemical workstation equipment for electrochemical synchronous testing.

[0020] In the above technical solution, the number of the solution pool components can be adjusted according to the amount of electrolyte required by the test system, and the inside of the cavity is marked with scales to achieve accurate quantitative control of the system electrolyte.

[0021] In the above technical solution, the second groove and the first groove are respectively provided with sealing rings therein.

[0022] In the above technical solution, the multifunctional in-situ online detection electrochemical cell also includes an adaptive support stand, which is reinforced with screws to ensure the stability of the electrolytic cell.

[0023] In the above technical solution, the support platform is provided with a third fixing channel, and the third fixing channel and the solution pool component have built-in threads at corresponding positions, so that a threaded fastening connection can be formed between the polytetrafluoroethylene solution pool and the support platform.

[0024] Compared with the existing in-situ electrochemical cell, the present invention has the following beneficial effects:

[0025] (1) The innovative features of the multifunctional in-situ online detection electrochemical cell of the present invention are mainly reflected in: an optical path channel adapted for monitoring by fluorescence confocal equipment is provided, which solves the limitation on the placement of the detection sample; the present invention can observe the surface state of the working electrode in all directions by rationally arranging the structure of the electrochemical cell and the placement of the three electrodes, combined with a transparent quartz window, thereby greatly facilitating the observation of the focusing and measurement process before the test, and can simultaneously meet the test requirements of fluorescence confocal and Raman spectroscopy.

[0026] (2) The second groove and the first groove of the multifunctional in-situ online detection electrochemical cell of the present invention are both equipped with built-in sealing rings. The double rubber ring sealing prevents leakage of electrolyte, ensures the overall sealing of the device, and prevents the research system from contacting the outside world during the measurement process.

[0027] (3) The multifunctional in-situ online detection electrochemical cell of the present invention can be more widely adapted to different fluorescence confocal imaging instruments while ensuring the stability of the system by loading a specially made support stand.

[0028] (4) The multifunctional in-situ online detection electrochemical cell provided by the present invention can be used to monitor the surface changes of electrode materials in real time during electrochemical reactions, and can ensure that the system can observe the imaging of the electrode materials and the changes in structural properties in real time under the conditions of specific atmosphere and electric field control. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Figure 1 It is a longitudinal cross-sectional view of the multifunctional in-situ online detection electrochemical cell of the present invention.

[0031] Figure 2 This is the front view of the multifunctional in-situ online detection electrochemical cell of the present invention.

[0032] Figure 3 A longitudinal cross-sectional view of a multifunctional in-situ online detection electrochemical cell of the present invention assembled with three solution cell components.

[0033] Figure 4 A front view of a multifunctional in-situ online detection electrochemical cell of the present invention assembled with three solution cell components.

[0034] Figure 5 This is a top view of the multifunctional in-situ online detection electrochemical cell of the present invention.

[0035] Figure 6 It is a three-dimensional stereogram of the multifunctional in-situ online detection electrochemical cell assembly of the present invention.

[0036] The reference numerals in the figures indicate:

[0037] 1-PTFE solution pool;

[0038] 2-Solution pool assembly;

[0039] 3- first groove;

[0040] 4- first disassembly cover;

[0041] 5- Second disassembly cover;

[0042] 6- support platform;

[0043] 7- second groove;

[0044] 8-light hole;

[0045] 9-Quartz window;

[0046] 10- Conductive glass;

[0047] 11-electrode wiring hole;

[0048] 12-first fixed channel;

[0049] 13- second fixed hole;

[0050] 14- third fixed channel;

[0051] 15- electrode fixing block;

[0052] 16-reference electrode fixing block;

[0053] A-Lighting and observation access. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in combination with specific examples and with reference to the accompanying drawings. For the convenience of description, the "left", "right", "upper" and "lower" referred to below are consistent with the left, right, upper and lower of the accompanying drawings themselves, but do not limit the structure of the present invention.

[0055] Combination Figure 1-6 The multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing of the present invention is specifically described, comprising a detachable multifunctional polytetrafluoroethylene solution cell 1; the polytetrafluoroethylene solution cell 1 is mainly composed of a plurality of identical solution cell components 2, and the internal cavities thereof are connected after complete assembly; and a first disassembly cover 4 is arranged at the upper end of the polytetrafluoroethylene solution cell 1, and a second disassembly cover 5 is arranged at the lower end, and a light-through and observation passage A is loaded inside; the plurality of solution cell components 2 are connected by a first groove 3; the first disassembly cover 4 is internally equipped with a second groove 7, and the light-through hole 8 formed at this position is provided with an adaptive quartz window 9, which can facilitate the injection and testing of fluorescence confocal and Raman spectroscopy lasers; the first disassembly cover 4 also comprises a first fixing channel 12, and the first fixing channel 12 is internally threaded at the corresponding position of the solution cell component 2, so that the first disassembly cover 4 and A threaded fastening connection is formed between the solution pool components 2; a counter electrode fixing block 15 and a reference electrode fixing block 16 are fixed on both sides of the light-through hole 8 on the first disassembly cover 4, which can be used to fix the counter electrode and the reference electrode respectively; the second disassembly cover 5 is a detachable multi-electrode placement sheet, on which three conductive glasses 10 are embedded, which are used to coat or attach electrodes, and electrode wiring holes 11 are respectively provided at the corresponding positions of the three electrodes; the second disassembly cover 5 also includes a second fixing channel 13, and the second fixing channel 13 and the solution pool component 2 are internally threaded at the corresponding position, so that a threaded fastening connection is formed between the second disassembly cover 5 and the solution pool component 2; the light-through and observation passage A runs through the quartz window 9 at the light-through hole 8, the inner cavity of the polytetrafluoroethylene solution pool 1 and the conductive glass 10 on the second disassembly cover 5, thereby facilitating the laser injection and testing of fluorescence confocal and Raman spectroscopy.

[0056] As a preferred solution, a cavity is formed between the closely connected first disassembly cover 4, the solution pool assembly 2, and the second disassembly cover 5. The electrode loaded on the conductive glass 10 on the second disassembly cover 5 can form a three-electrode system in the cavity with the counter electrode and the reference electrode on the first disassembly cover 4, and can also form a three-electrode system by loading the working electrode, the counter electrode, and the working electrode with three conductive glasses 10. The wires loaded on the conductive glass 10 can be led out from the electrode wiring hole 11. The light hole 8 on the first disassembly cover 4 and the centers of the conductive glass 10 embedded in the solution pool assembly 2 and the second disassembly cover 5 are on the same vertical line, which can meet the lighting and testing requirements of fluorescence confocal and Raman spectroscopy, and realize real-time monitoring of the electrode to be tested.

[0057] The number of the solution pool components 2 can be adjusted according to the amount of electrolyte required by the test system. The inside of the cavity is marked with scales to achieve accurate quantitative control of the system electrolyte. A first assembly groove 3 is provided between the solution pool components 2 to ensure the airtightness and stability of the system.

[0058] As a preferred solution, the second groove 7 and the first groove 3 are respectively built with sealing rings, and the double rubber ring sealing avoids electrolyte leakage and ensures the overall sealing of the device.

[0059] As a preferred solution, the multifunctional in-situ online detection electrochemical cell also includes an adapted support platform 6, which is reinforced with screws to ensure the stability of the electrolytic cell. The support platform 6 is provided with a third fixing channel 14, and the third fixing channel 14 is built with threads at the corresponding position of the solution pool component 2, so that the polytetrafluoroethylene solution pool 1 and the support platform 6 can form a threaded fastening connection.

[0060] The assembly and testing process of the multifunctional in-situ online detection electrochemical cell of the invention is described in detail below.

[0061] Figure 1 This is a longitudinal cross-sectional view of the multifunctional in-situ online detection electrochemical cell of the present invention. The system to be tested is sensitive to water and oxygen and needs to be filled with liquid and sealed under the protection of an inert atmosphere.

[0062] 1. Assembly and fixation of electrochemical cell

[0063] Combined with the attached figure ( Figure 2 The main view of the multifunctional in-situ online detection electrochemical cell. Figure 3 A longitudinal cross-sectional view of the three solution cell components of the multifunctional in-situ online detection electrochemical cell. Figure 4 The front view of the multifunctional in-situ online detection electrochemical cell with three solution pool components), the installation position and installation method of the two multifunctional in-situ online detection electrochemical cell three-electrode systems of the present invention are described as follows:

[0064] If there is no need to observe the counter electrode or reference electrode or the system has corresponding requirements for the type or shape of the electrode, the first assembly method can be used. The working electrode is tightly attached or coated on the conductive glass 10 embedded in the second disassembly cover 5, and the second disassembly cover 5 is installed on the lower end of the solution pool component 2; the appropriate number of solution pool components is selected according to the required amount of electrolyte (taking three solution pool components as an example), and the solution pool components are connected through the built-in sealing ring of the first groove 3; the rod-shaped counter electrode CE and the reference electrode RE are respectively passed through the hole of Φ=2mm on the first disassembly cover 4 and fixed on the counter electrode fixing block 15 and the reference electrode fixing block 16; after the electrolyte is injected into the cavity of the polytetrafluoroethylene solution pool 1, the first disassembly cover 4 is covered on the upper end of the solution pool component 2, so that the centers of the conductive glass 10, the cavity of the solution pool component 2, and the quartz window 9 are in the same straight line; the first disassembly cover 4 and the solution pool component 2 are fixedly connected by four screws through the first fixing hole 12, and the second disassembly cover 5 and the solution pool component 2 are fixedly connected by four screws through the second fixing hole 13.

[0065] Connect one end of the two external wires to the rod-shaped counter electrode CE and reference electrode RE respectively, and connect the external wires to the electrochemical workstation; connect the wires fixed on the working electrode conductive glass 10 and led out from the electrode wiring hole 11 to the electrochemical workstation to form a three-electrode system.

[0066] If the working electrode, reference electrode and counter electrode need to be monitored in situ at the same time, the second assembly method can be used. The working electrode, reference electrode and counter electrode are respectively tightly attached or coated on the conductive glass 10 embedded in the second disassembly cover 5, and the second disassembly cover 5 is installed on the lower end of the solution pool component 2; the appropriate number of solution pool components is selected according to the required amount of electrolyte (taking three solution pool components as an example), and the solution pool components 2 are connected through the built-in sealing ring of the first groove 3; the counter electrode fixing block 15 and the reference electrode fixing block 16 located on the first disassembly cover 4 are tightly plugged with suitable hole plugs; after injecting electrolyte into the cavity of the polytetrafluoroethylene solution pool 1, the first disassembly cover 4 is covered on the upper end of the solution pool component 2, so that the centers of the conductive glass 10, the cavity of the solution pool component 2 and the quartz window 9 are in the same straight line; the first disassembly cover 4 is fixedly connected to the solution pool component 2 by four screws through the first fixing hole 12, and the second disassembly cover 5 is fixedly connected to the solution pool component 2 by four screws through the second fixing hole 13.

[0067] The wires fixed on the working electrode, the reference electrode and the counter electrode conductive glass and led out from the corresponding electrode wiring holes 11 are respectively connected to the electrochemical workstation to form a three-electrode system.

[0068] The first disassembly cover 4 , the second disassembly cover 5 and the solution pool assembly 2 which are screw-fastened are placed in the support platform 6 , and the polytetrafluoroethylene solution pool 1 is connected to the support platform 6 by screws through the third fixing hole 14 .

[0069] In the above steps, the first disassembly cover 4, the solution pool assembly 2, and the second disassembly cover 5 are fixed to each other, and the corresponding positions of the three have screw holes and internal threads, and each can be fastened by four fixing screws to form a fastening connection and effectively ensure the airtightness of the system; the polytetrafluoroethylene solution pool 1 is fixed by screws and placed on the adapted bracket 6, so as to ensure the stability of the electrolytic cell structure and avoid the influence of noise, vibration, etc. on the precision experiment; the two sets of three-electrode systems of the multifunctional in-situ online detection electrochemical cell of the present invention not only avoid the contact between the research system and the outside world during the measurement process by reasonably arranging the structure of the electrochemical cell and the placement of the three electrodes, but also meet different experimental test requirements; the detachable solution pool assembly 2 can meet the test requirements of different electrolyte dosage systems; the marking scale in the polytetrafluoroethylene solution pool 1 can avoid the influence of uneven electrolyte dosage on the experimental results; at the same time, due to the use of a transparent quartz window 9 and a transparent conductive glass 10 as an electrode carrier, the surface state of the electrode can be effectively observed, and the test requirements of fluorescence confocal and Raman spectroscopy can be met at the same time.

[0070] 2. Filling and sealing of electrochemical cells

[0071] Select the appropriate number of solution pool components according to the system electrolyte filling volume (taking three solution pool components as an example), use a pipette to inject a quantitative electrolyte into the cavity of the polytetrafluoroethylene solution pool 1 under the protection of an inert atmosphere, add liquid according to the scale marked in the cavity, and then install the first disassembly cover 4 on the upper part of the solution pool component 2 to close the entire electrochemical cell.

[0072] The multifunctional in-situ online detection electrochemical cell of the present invention ensures the overall sealing of the device through the combination of the solution cell assembly 2 and the first disassembly cover 4 and the second disassembly cover 5. The built-in sealing rings in the second groove 7 and the first groove 3 effectively avoid problems such as electrolyte leakage and destruction of the water and oxygen environment.

[0073] 3. Testing process

[0074] The test process is carried out at room temperature and pressure. The multifunctional in-situ online detection electrochemical cell filled with electrolyte and fixed on the bracket 6 is installed on a horizontal movable frame supporting fluorescence confocal and Raman spectroscopy testing. The emitted light is focused through the quartz window 9 onto the electrode to be tested located on the conductive glass 10 of the second disassembly cover 5 for data acquisition. The signal light is collected and processed, which can be used to monitor the material composition and structural changes of the electrode surface during the electrochemical reaction in real time, and can ensure that the system monitors the imaging changes of the electrode surface to be tested under the conditions of inert atmosphere, electric field regulation, etc.

[0075] The multifunctional in-situ online detection electrochemical cell of the present invention is provided with an optical path channel adapted for monitoring by a fluorescence confocal device, which solves the limitation on the placement of the detection sample; the present invention can observe the surface state of the working electrode in all directions by rationally arranging the structure of the electrochemical cell and the placement of the three electrodes, combined with a transparent quartz window, thereby greatly facilitating the observation of the focusing and measurement process before the test. The present invention overcomes the problems that the conventional in-situ Raman spectroscopic electrochemical cell is incompatible with the fluorescence confocal test system, can only detect a single working electrode, and the electrochemical cell leaks due to the gravity of the solution and insufficient sealing, or is not suitable for testing of water-oxygen sensitive systems.

[0076] The specific embodiments described above are further detailed descriptions of the objectives, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing, comprising: Polytetrafluoroethylene solution tank (1); The invention is characterized in that the main body of the polytetrafluoroethylene solution pool (1) is a solution pool whose internal cavities are connected and which is composed of a plurality of identical solution pool components (2); and the upper end of the polytetrafluoroethylene solution pool (1) is provided with a first disassembly cover (4), and the lower end is provided with a second disassembly cover (5), and a light-transmitting and observation passage (A) is installed inside; The plurality of solution pool components (2) are connected to each other via a first groove (3); The first disassembly cover (4) is internally provided with a second groove (7), and a light-through hole (8) formed on the second groove (7) is provided with an adapted quartz window (9) to facilitate the injection and testing of fluorescence confocal and Raman spectroscopy lasers; the first disassembly cover (4) further comprises a first fixing channel (12), and the first fixing channel (12) is provided with a threaded inner portion at a position corresponding to the solution pool assembly (2), so that a threaded fastening connection is formed between the first disassembly cover (4) and the solution pool assembly (2); a counter electrode fixing block (15) and a reference electrode fixing block (16) are fixed on both sides of the light-through hole (8), and can be used to fix the counter electrode and the reference electrode, respectively; The second disassembly cover (5) is embedded with three pieces of conductive glass (10) for coating or attaching electrodes, and electrode wiring holes (11) are respectively provided at positions corresponding to the three electrodes; the second disassembly cover (5) also includes a second fixing hole (13), and the second fixing hole (13) is internally threaded at positions corresponding to the solution pool component (2), so that a threaded fastening connection is formed between the second disassembly cover (5) and the solution pool component (2); The light-through and observation passage (A) passes through the quartz window (9) at the light-through hole (8), the inner cavity of the polytetrafluoroethylene solution pool (1) and the conductive glass (10) on the second disassembly cover (5), thereby facilitating the laser injection and testing of fluorescence confocal and Raman spectroscopy.

2. The multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing according to claim 1, characterized in that: The counter electrode and the reference electrode fixed by the counter electrode fixing block (15) and the reference electrode fixing block (16) on the first disassembly cover (4) respectively, together with the working electrode carried by the conductive glass (10) on the second disassembly cover (5), form a three-electrode system of the in-situ electrochemical cell; the three-electrode system is located in a cavity formed by the solution cell assembly (2), the first disassembly cover (4) and the second disassembly cover (5); the light hole (8) on the first disassembly cover (4), the solution cell assembly (2) and the conductive glass (10) embedded in the second disassembly cover (5) are located on the same vertical line.

3. The multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing according to claim 1, characterized in that: The three conductive glasses (10) embedded in the second disassembly cover (5) can carry different electrode materials that can be coated or fixed and simultaneously serve as a counter electrode, a working electrode, and a reference electrode carrier to form a three-electrode system and realize direct real-time monitoring of the three electrodes; the conductive glasses (10) are all embedded with electrode wires that are led out from the electrode wiring holes (11) on the second disassembly cover (5) to connect to an electrochemical workstation device to perform electrochemical synchronous testing.

4. The multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing according to claim 1, characterized in that: The number of solution pool components (2) can be adjusted according to the amount of electrolyte required by the test system, and the interior of the cavity is marked with scales, which can achieve accurate quantitative control of the electrolyte in the system.

5. The multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing according to claim 1, characterized in that: The second groove (7) and the first groove (3) are each provided with a sealing ring.

6. The multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing according to claim 1, characterized in that: It also includes an adapted support platform (6) which is reinforced with screws to ensure the stability of the electrolytic cell.

7. The multifunctional in-situ online detection electrochemical cell for fluorescence confocal and Raman spectroscopy testing according to claim 6, characterized in that: The support platform (6) is provided with a third fixing hole (14), and the third fixing hole (14) is internally threaded at positions corresponding to the solution pool component (2), so that a threaded fastening connection can be formed between the polytetrafluoroethylene solution pool (1) and the support platform (6).

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