An in-situ electrochemical reaction monitoring method
By setting electrodes and detection components in a transmission electron microscope, in-situ monitoring and performance testing of electrochemical reactions can be achieved, solving the problems of inaccurate detection and sample damage in existing technologies, and providing accurate and reliable monitoring of electrode performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING INST OF TECH
- Filing Date
- 2023-04-10
- Publication Date
- 2026-05-12
AI Technical Summary
Existing technologies struggle to achieve accurate, reliable, and convenient in-situ detection during the electrochemical reaction process of battery electrodes. Furthermore, removing samples for testing can easily damage them and introduce uncontrollable variables.
By designing support components and sample holders in a transmission electron microscope, electrodes, mechanical detection components, and electrical detection components are respectively set up to achieve in-situ monitoring of electrochemical reactions, and real-time imaging and parameter detection are performed using a transmission electron microscope.
It enables in-situ monitoring of electrochemical reaction processes, avoiding sample damage and external influences, providing accurate mechanical and electrical performance testing, and supporting performance analysis throughout the entire process.
Smart Images
Figure CN116642929B_ABST
Abstract
Description
Technical Field
[0001] This specification relates to the field of electrochemical reaction technology, and in particular to an in-situ electrochemical reaction monitoring method. Background Technology
[0002] With the development of science and technology and new energy, batteries have become an indispensable requirement in various industries. Research on the internal charging and discharging processes and electrochemical reactions of batteries is of great significance for battery development and innovation. Furthermore, understanding the changes in the mechanical and electrical properties of electrodes after the electrochemical reaction process is crucial for studying electrode kinetics and gaining a deeper understanding of the battery's working mechanism. Traditional techniques involve disassembling battery electrodes for characterization and research, but the information obtained is non-in-situ and delayed. With the development of electron transmission microscopy (TEM), some research can now monitor electrochemical reaction processes using TEM. However, to assess the changes in the mechanical and electrical properties of electrodes after the electrochemical reaction, it is still necessary to remove the sample from the TEM and use other testing equipment. Removing the sample from the TEM not only easily damages the sample but also exposes it to the external environment, potentially leading to electrode oxidation or other changes, introducing uncontrollable variables, and ultimately resulting in inaccurate and unreliable test results.
[0003] Therefore, it is necessary to provide an in-situ electrochemical reaction monitoring method to achieve accurate, reliable, convenient and efficient in-situ electrochemical reaction process monitoring. Summary of the Invention
[0004] This specification provides an in-situ electrochemical reaction monitoring method, the method comprising: placing a first electrode on a support assembly of a transmission electron microscope; placing a second electrode at a first position on a sample holder; moving the support assembly to the first position to cause an electrochemical reaction between the first electrode and the second electrode; moving the support assembly to a second position on the sample holder, the second position being provided with a mechanical detection component or an electrical detection component; and detecting the mechanical or electrical parameters of the first electrode after the electrochemical reaction based on the mechanical or electrical detection component.
[0005] In some embodiments, the first electrode comprises at least one of graphite, vanadium oxide, molybdenum disulfide, tantalum disulfide, or manganese dioxide.
[0006] In some embodiments, the support component includes a metal needle tip.
[0007] In some embodiments, the second electrode comprises at least one of solid lithium, solid sodium, solid potassium, solid magnesium, or solid calcium.
[0008] In some embodiments, the sample holder includes a comb-shaped sample holder.
[0009] In some embodiments, the mechanical testing component includes a cantilever beam mechanical testing component.
[0010] In some embodiments, detecting the mechanical or electrical parameters of the first electrode after the electrochemical reaction based on the mechanical or electrical detection component includes: applying a force to the first electrode after the electrochemical reaction through the support component, wherein the first electrode contacts the mechanical detection component during the application of the force; determining the mechanical information of the force based on the deformation information of the mechanical detection component during the application of the force; and determining the mechanical parameters of the first electrode after the electrochemical reaction based on the mechanical information.
[0011] In some embodiments, detecting the mechanical or electrical parameters of the first electrode after the electrochemical reaction based on the mechanical or electrical detection component includes: applying a force to the first electrode after the electrochemical reaction via the support component, wherein the first electrode contacts the mechanical detection component during the application of the force; acquiring imaging information via the transmission electron microscope during the application of the force; determining the mechanical information of the force based on the deformation information of the mechanical detection component during the application of the force; and determining the mechanical parameters of the first electrode after the electrochemical reaction based on the imaging information and the mechanical information.
[0012] In some embodiments, detecting the mechanical or electrical parameters of the first electrode after the electrochemical reaction based on the mechanical or electrical detection component includes: welding the first electrode to the second position using an electron beam emitted by the transmission electron microscope; applying a current to the first electrode based on the electrical detection component; acquiring current information from the electrical detection component during the current application process; and determining the electrical parameters of the first electrode after the electrochemical reaction based on the current information.
[0013] In some embodiments, detecting the mechanical or electrical parameters of the first electrode after the electrochemical reaction based on the mechanical or electrical detection component includes: welding the first electrode to the second position using an electron beam emitted by the transmission electron microscope; applying a current to the first electrode based on the electrical detection component; acquiring imaging information using the transmission electron microscope during the current application process; acquiring current information from the electrical detection component during the current application process; and determining the electrical parameters of the first electrode after the electrochemical reaction based on the imaging information and the current information.
[0014] In the embodiments of this specification, by setting electrodes, mechanical detection components, and / or electrical detection components at different positions on the sample holder, in-situ monitoring of the electrochemical reaction process can be achieved using transmission electron microscopy, while further in-situ mechanical and / or electrical performance testing of the electrodes after the electrochemical reaction can be realized. This allows for in-situ monitoring of the entire process before, during, and after the electrochemical reaction. Furthermore, during the mechanical and / or electrical performance testing, in-situ real-time imaging can be achieved using transmission electron microscopy, enabling more comprehensive mechanical and / or electrical performance analysis. Attached Figure Description
[0015] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:
[0016] Figure 1 This is a flowchart illustrating an exemplary in-situ electrochemical reaction monitoring method according to some embodiments of this specification.
[0017] Figure 2 This is a schematic diagram of an exemplary in-situ electrochemical reaction monitoring process according to some embodiments of this specification.
[0018] Figure 3A and 3B This is a schematic diagram of an exemplary mechanical property testing process according to some embodiments of this specification.
[0019] Figure 4 This is a schematic diagram of an exemplary electrical performance testing process according to some embodiments of this specification. Detailed Implementation
[0020] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.
[0021] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.
[0022] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.
[0023] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.
[0024] Figure 1 This is a flowchart illustrating an exemplary electrochemical reaction monitoring method according to some embodiments of this specification. In some embodiments, process 100 can be executed automatically by a control system. For example, process 100 can be implemented by control commands, based on which the control system controls the components to complete various operations of process 100. In some embodiments, process 100 can be executed semi-automatically. For example, one or more operations of process 100 can be performed manually by an operator. In some embodiments, when completing process 100, one or more additional operations not described may be added, and / or one or more operations discussed herein may be removed. Additionally, Figure 1 The order of operations shown is not restrictive. Figure 1 As shown, process 100 may include the following steps.
[0025] The following description uses lithium charging or discharging electrochemical reaction processes as an example, but it does not constitute a limitation of this specification. The technical solutions described in this specification can also be used for sodium charging or discharging, potassium charging or discharging, zinc charging or discharging, and other electrochemical reaction processes.
[0026] In step 110, the first electrode is placed on the support assembly of the transmission electron microscope.
[0027] In some embodiments, the support component may be a metal tip used in transmission electron microscopy. In some embodiments, the metal tip may include silver, gold, copper, tungsten, platinum-iridium, etc. In some embodiments, the support component may be other materials used in transmission electron microscopy that can be used to support samples or electrodes, and this specification is not limiting in this regard.
[0028] In some embodiments, the first electrode may be soldered to the support assembly. In some embodiments, the first electrode may be bonded to the support assembly. In some embodiments, the first electrode may be fixed to the support assembly by other suitable methods, which are not limited herein.
[0029] In some embodiments, the first electrode may include at least one of graphite, vanadium oxide, molybdenum disulfide, tantalum disulfide, or manganese dioxide. In some embodiments, the first electrode may also be other electrode materials capable of achieving lithium charging or discharging reactions, which are not limited in this specification.
[0030] In step 120, the second electrode is placed in the first position of the sample holder.
[0031] In some embodiments, the second electrode comprises at least one of solid lithium, solid sodium, solid potassium, solid magnesium, or solid calcium. Taking the lithium charging or discharging process as an example, the second electrode can be solid lithium.
[0032] In some embodiments, the sample holder may include a metal sample holder used in transmission electron microscopy. In some embodiments, the metal sample holder may include copper mesh, gold mesh, nickel mesh, molybdenum mesh, etc., or any combination thereof. In some embodiments, the sample holder may include a comb-shaped sample holder. For example, as... Figure 2 As shown, the comb-shaped sample holder may include at least two comb teeth, and the second electrode may be fixed at one of the comb teeth.
[0033] In some embodiments, the second electrode can be fixed to the first position of the sample holder by means of welding, bonding, or other methods.
[0034] In step 130, the support assembly is moved to a first position to allow the first electrode to undergo an electrochemical reaction with the second electrode.
[0035] In some embodiments, such as Figure 2 As shown, the support assembly and sample holder are connected to an external power source. When the support assembly is moved to the first position, the first electrode contacts the second electrode, thereby forming a current loop, which in turn triggers an electrochemical reaction (e.g., lithium charging reaction, lithium discharging reaction). In some embodiments, a motion system (e.g., a micro-robotic arm, a moving rod, etc.) can be automatically or manually controlled to move the support assembly to the first position of the sample holder.
[0036] In some embodiments, in-situ monitoring of the electrochemical reaction process can be achieved using transmission electron microscopy. For example, in-situ imaging can be performed using transmission electron microscopy during the electrochemical reaction process to acquire image data or video stream data of the in-situ electrochemical reaction process, thereby monitoring the morphological changes of the electrodes throughout the entire process.
[0037] In step 140, the support assembly is moved to the second position of the sample holder, where a mechanical detection assembly or an electrical detection assembly is provided.
[0038] In some embodiments, such as Figure 2 As shown, after the first and second electrodes undergo an electrochemical reaction (e.g., lithium charging or discharging), a motion system (e.g., a micro-robotic arm, a moving rod, etc.) can be automatically or manually controlled to move the support assembly to a second position on the sample holder. In some embodiments, a mechanical detection component or an electrical detection component may be provided at the second position. This is merely an example. Figure 2 As shown, a mechanical detection component is installed at the second position A, and an electrical detection component is installed at the second position B.
[0039] In some embodiments, the mechanical testing component may include a cantilever beam mechanical testing component. The mechanical information of the applied force can be calculated and determined using the deformation information of the cantilever beam.
[0040] In some embodiments, the electrical detection component may include an external power supply and an analytical control unit. In some embodiments, the electrical detection component and the external power supply used in the electrochemical reaction may be the same component or different components. In some embodiments, the parameters of the external power supply can be controlled by the analytical control unit to realize the electrochemical reaction process and the electrical detection process separately. For example, different current and / or voltage magnitudes can be set to realize the electrochemical reaction process and the electrical detection process respectively. Specifically, for example, to realize the lithium charging or discharging reaction, the electrochemical reaction process requires a larger current; while the electrical detection process is to detect the electrical performance of the electrode (e.g., resistivity, conductivity, etc.), and it is necessary to suppress the lithium charging or discharging reaction, so the current should be controlled within a smaller current range.
[0041] In step 150, the mechanical or electrical parameters of the first electrode after the electrochemical reaction are detected based on the mechanical or electrical detection components.
[0042] In some embodiments, after the support component is moved to the second position, a force can be applied to the first electrode after the electrochemical reaction via the support component. During the application of the force, the first electrode comes into contact with the mechanical sensing component. For example, as... Figure 3A and 3B As shown, the mechanical testing component is a cantilever beam type mechanical testing component. By moving the support component, the first electrode is brought into contact with the mechanical testing component. Then, the support component is moved again to apply an external force to the first electrode. At this time, due to the action of the external force, the cantilever beam type mechanical testing component undergoes bending deformation, and its bending deformation can reflect the mechanical information of the applied external force.
[0043] In some embodiments, during the application of force through the support component, the mechanical information of the applied external force can be determined based on the deformation information of the mechanical detection component (e.g., the bending deformation of a cantilever beam). That is, during the application of force through the support component, the real-time external force can be determined using the deformation information of the mechanical detection component. In some embodiments, the external force applied by the mechanical detection component can change dynamically (e.g., dynamically over time). In some embodiments, the mechanical information can include the magnitude, direction, rate of change of force, etc., or any combination thereof.
[0044] Furthermore, the mechanical parameters of the first electrode after the electrochemical reaction can be determined based on mechanical information. In some embodiments, the mechanical parameters may include stress under a specific external force, strain under a specific external force, stress-strain curves under different external forces, Young's modulus, etc., or any combination thereof.
[0045] In some embodiments, during the application of force through the support component, imaging information can also be acquired using a transmission electron microscope. That is, during the application of force, changes in the internal structure or morphology of the first electrode can be observed in situ using a transmission electron microscope.
[0046] Furthermore, the mechanical parameters of the first electrode after the electrochemical reaction can be determined based on imaging information acquired by transmission electron microscopy and mechanical information determined based on deformation information from mechanical detection components. In some embodiments, the mechanical parameters may include the dynamic evolution of the electrode structure (e.g., slip surface) under stress, the dynamic evolution of defects (e.g., cracks, dislocations, stacking faults) under stress, or any combination thereof.
[0047] In some embodiments, after the support assembly is moved to the second position, the first electrode can be welded to the second position using an electron beam emitted by a transmission electron microscope. For example, as... Figure 4 As shown, by moving the support assembly, the first electrode is brought into contact with the second position (which can be understood as part of the metal sample holder, or as part of the electrical detection assembly). Then, an electron beam is emitted using a transmission electron microscope to weld the first electrode to the second position. Accordingly, the first electrode and the electrical detection assembly form an electrical circuit. Current can be applied to the first electrode based on the electrical detection assembly.
[0048] In some embodiments, the current information of the electrical detection component can be acquired during the application of current through the electrical detection component. That is, the real-time current applied can be determined during the application of current. In some embodiments, the current applied by the electrical detection component can change dynamically (e.g., change dynamically over time).
[0049] Furthermore, the electrical parameters of the first electrode after the electrochemical reaction can be determined based on the current information. In some embodiments, the electrical parameters may include resistance at a specific current, resistivity at a specific current, dynamic changes in resistance or resistivity at different currents, conductance at a specific current, conductivity at a specific current, dynamic changes in conductance or conductivity at different currents, or any combination thereof.
[0050] In some embodiments, imaging information can also be acquired by transmission electron microscopy while current is applied through the electrical detection component. That is, during the application of current, changes in the internal structure or morphology of the first electrode can be observed in situ using transmission electron microscopy.
[0051] Furthermore, the electrical parameters of the first electrode after the electrochemical reaction can be determined based on the imaging information acquired by transmission electron microscopy and the current information of the electrical detection component. In some embodiments, the electrical parameters may include the structure or morphology at the resistance or resistivity change node, the structure or morphology at the conductance or conductivity change node, relaxation process, or any combination thereof.
[0052] It is understood that after the first and second electrodes undergo an electrochemical reaction (e.g., lithium charging or discharging), the internal structure and performance of the first electrode will change accordingly. Timely and accurate study of these changes is crucial for understanding the battery's working mechanism. Accordingly, in the embodiments of this specification, after the electrochemical reaction occurs at the first and second electrodes, the first electrode, after the electrochemical reaction, is moved to the second position promptly and conveniently using a moving support assembly. Changes in its mechanical or electrical properties are then detected promptly and accurately using a mechanical or electrical detection assembly. Compared to removing the electrode after the electrochemical reaction from a transmission electron microscope for delayed observation, this embodiment not only achieves quasi-in-situ monitoring but also avoids additional variables introduced during removal (e.g., sample damage, oscillations during movement, temperature changes, etc.). Furthermore, while detecting changes in mechanical or electrical properties using the mechanical or electrical detection assembly, real-time in-situ imaging can be performed using a transmission electron microscope, enabling more comprehensive and multi-dimensional monitoring and analysis.
[0053] In some embodiments, before step 130, i.e., before the electrochemical reaction between the first electrode and the second electrode, the first electrode can be moved to a second position, and its mechanical or electrical parameters can be detected by a mechanical detection component or an electrical detection component. Then, the first electrode is moved to a first position to undergo the electrochemical reaction with the second electrode. Further, the first electrode after the electrochemical reaction is moved to the second position, and its mechanical or electrical parameters are detected by the mechanical or electrical detection component. Accordingly, through the entire process, performance comparisons before and after the electrochemical reaction, as well as during the electrochemical reaction, can be achieved, enabling global monitoring of the entire electrochemical reaction process.
[0054] It should be noted that the above description of process 100 is for illustrative purposes only and does not limit the scope of this specification. Those skilled in the art can make various modifications and changes to process 100 under the guidance of this specification. However, these modifications and changes remain within the scope of this specification.
[0055] Example 1
[0056] Molybdenum disulfide electrode sheets are fixed to the gold needle tip of a transmission electron microscope, and solid lithium sheets are fixed to the comb teeth of the comb-shaped sample holder. Cantilever beam assemblies and external power supplies (and corresponding analytical control components) are installed at the other two comb teeth of the comb-shaped sample holder.
[0057] The gold needle tip is moved to the cantilever beam assembly, bringing the molybdenum disulfide electrode into contact with it. Further, by moving the gold needle tip, an external force is applied to the molybdenum disulfide electrode. Under this force, the cantilever beam assembly undergoes bending deformation. The bending deformation information allows for real-time monitoring of the applied external force, thus enabling the mechanical property testing of the molybdenum disulfide electrode. In-situ imaging can also be performed using a transmission electron microscope during the mechanical property testing process.
[0058] After completing the mechanical property testing, the gold needle tip is moved to the position of another tooth on the comb-shaped sample holder, and the external power supply is turned on. At this point, the molybdenum disulfide electrode and the electrical detection assembly form an electrical circuit. By controlling the magnitude of the current applied by the external power supply, the electrical properties of the molybdenum disulfide electrode can be tested. During the electrical property testing process, in-situ imaging can also be performed using a transmission electron microscope.
[0059] Furthermore, the gold needle tip is moved to the solid lithium sheet, and the external power supply is turned on and the current of the external power supply is adjusted to achieve the lithium charging reaction of the molybdenum disulfide electrode sheet.
[0060] After the lithium charging reaction is completed, the lithium-charged molybdenum disulfide electrode sheet is moved to the cantilever beam assembly and the electrical detection assembly, respectively, to detect the mechanical and electrical properties.
[0061] The entire device and process enable performance comparison before and after the electrochemical reaction, as well as during the electrochemical reaction, and achieve global monitoring of the entire electrochemical reaction process.
[0062] The beneficial effects that the embodiments of this specification may bring include, but are not limited to: (1) By setting electrodes, mechanical detection components and / or electrical detection components at different positions of the sample holder, in-situ monitoring of the electrochemical reaction process can be achieved through transmission electron microscopy, while further in-situ mechanical and / or electrical performance testing of the electrodes after the electrochemical reaction can be achieved, and in-situ monitoring of the entire process before, during and after the electrochemical reaction can be achieved. (2) In the process of mechanical and / or electrical performance testing, in-situ real-time imaging can be achieved through transmission electron microscopy, and correspondingly, more dimensions of mechanical and / or electrical performance analysis can be achieved. (3) In the process of mechanical and / or electrical performance testing, by dynamically changing the applied external force and / or current, dynamic monitoring and analysis of mechanical and / or electrical performance can be achieved.
[0063] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects may be any one or a combination of the above, or any other possible beneficial effects.
[0064] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.
[0065] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.
[0066] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods described herein. Although various examples have been discussed in the foregoing disclosure of some embodiments of the invention that are currently considered useful, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the spirit and scope of the embodiments described herein. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely using software solutions, such as installing the described system on existing servers or mobile devices.
[0067] Similarly, it should be noted that, in order to simplify the description disclosed herein and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of embodiments in this specification may sometimes combine multiple features into a single embodiment, drawing, or description thereof. However, this method of disclosure does not imply that the subject matter of this specification requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of a single embodiment disclosed above.
[0068] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.
Claims
1. A method for monitoring in-situ electrochemical reactions, characterized in that, The method includes: The first electrode is placed on the support assembly of the transmission electron microscope; The second electrode is placed in the first position of the sample holder, and the second electrode comprises solid lithium. Move the support assembly to the first position to cause the first electrode and the second electrode to undergo a lithium charging or discharging reaction; In-situ imaging is performed using the transmission electron microscope during the lithium charging or lithium discharging reaction. After the lithium charging reaction or the lithium discharging reaction is completed, the support component is moved to the second position of the sample holder. The second position is provided with a mechanical detection component or an electrical detection component. The second position is different from the first position. At the second position, based on the mechanical detection component or the electrical detection component, the mechanical parameters or electrical parameters of the first electrode after the lithium charging reaction or the lithium discharging reaction are detected; In the process of detecting the mechanical parameters or the electrical parameters, in-situ imaging is performed using the transmission electron microscope.
2. The method as described in claim 1, characterized in that, The first electrode comprises at least one of graphite, vanadium oxide, molybdenum disulfide, tantalum disulfide, or manganese dioxide.
3. The method as described in claim 1, characterized in that, The support component includes a metal needle tip.
4. The method as described in claim 1, characterized in that, The sample holder includes a comb-shaped sample holder.
5. The method as described in claim 1, characterized in that, The mechanical testing components include cantilever beam mechanical testing components.
6. The method as described in claim 1, characterized in that, The detection of the mechanical or electrical parameters of the first electrode after the lithium charging or discharging reaction, based on the mechanical or electrical detection component, includes: Through the support component, a force is applied to the first electrode after the lithium charging reaction or the lithium discharging reaction. During the application of the force, the first electrode comes into contact with the mechanical detection component. During the application of force, the mechanical information of the force is determined based on the deformation information of the mechanical detection component; Based on the mechanical information, the mechanical parameters of the first electrode after the electrochemical reaction are determined.
7. The method as described in claim 1, characterized in that, The detection of the mechanical or electrical parameters of the first electrode after the lithium charging or discharging reaction, based on the mechanical or electrical detection component, includes: Through the support component, a force is applied to the first electrode after the lithium charging reaction or the lithium discharging reaction. During the application of the force, the first electrode comes into contact with the mechanical detection component. During the application of force, imaging information is acquired using the transmission electron microscope; During the application of force, the mechanical information of the force is determined based on the deformation information of the mechanical detection component; Based on the imaging information and the mechanical information, the mechanical parameters of the first electrode after the electrochemical reaction are determined.
8. The method as described in claim 1, characterized in that, The detection of the mechanical or electrical parameters of the first electrode after the lithium charging or discharging reaction, based on the mechanical or electrical detection component, includes: The first electrode is welded to the second position using an electron beam emitted by the transmission electron microscope; A current is applied to the first electrode based on the electrical detection component; During the application of current, the current information of the electrical detection component is acquired; Based on the current information, the electrical parameters of the first electrode after the electrochemical reaction are determined.
9. The method as described in claim 1, characterized in that, The detection of the mechanical or electrical parameters of the first electrode after the lithium charging or discharging reaction, based on the mechanical or electrical detection component, includes: The first electrode is welded to the second position using an electron beam emitted by the transmission electron microscope; A current is applied to the first electrode based on the electrical detection component; During the application of current, imaging information is acquired through the transmission electron microscope; During the application of current, the current information of the electrical detection component is acquired; Based on the imaging information and the current information, the electrical parameters of the first electrode after the electrochemical reaction are determined.