Optical in-situ observation method of aqueous battery

Abstract

The invention discloses an optical in-situ observation method for an aqueous battery, and belongs to the technical field of aqueous batteries, and the method comprises the following steps: placing the aqueous battery on a total internal reflection fluorescence microscope operating platform, adding 0 or 2-5wt% of a fluorescent probe into an ion electrolyte of the aqueous battery, connecting the aqueous battery to a blue battery tester, and measuring the concentration of the blue battery according to the total internal reflection fluorescence microscope operating platform. 1-5 mA cm <-2 > is set by using a blue battery tester to carry out charging and discharging test on the battery, and the negative electrode lithium dendrite growth process and the fluorescence change between the positive electrode and the negative electrode are observed to obtain dynamic information of generation, consumption, transmission and spatial distribution of lithium ions. According to the water-based battery disclosed by the invention, the behavior of ion transmission in the battery can be visually observed, dynamic information such as ion generation, consumption, transmission and spatial distribution can be obtained, and the battery is simple and convenient to prepare and high in repeatability.

Description

Technical Field

[0001] This invention belongs to the field of aqueous battery technology, specifically relating to an optical in-situ observation method for aqueous batteries. Background Technology

[0002] Aqueous-ion batteries are considered one of the most promising alternatives to organic batteries due to their high safety, low cost, and high ionic conductivity. Therefore, improving the energy density and cycle life of aqueous-ion batteries is a pressing issue. Common aqueous batteries include lead-acid batteries, aqueous lithium-ion batteries, and aqueous zinc-ion batteries. Taking aqueous lithium-ion batteries as an example, observing the interaction between lithium ions and electrodes helps reveal the dynamic transport mechanisms and failure causes within the battery, providing new observational tools for improving energy density and constructing long-life aqueous lithium-ion batteries through rational design and performance optimization.

[0003] However, there are very few technologies related to in-situ optical observation of aqueous lithium-ion batteries. The only invention patents are: the in-situ optical detection lithium-ion battery designed by Xu Jingjing et al., which detects the dissolution and shuttle process of organic electrode materials of lithium-ion batteries and intermediates generated during charging and discharging; and the optical in-situ observation lithium-ion battery for variable temperature charging and discharging designed by Ding Meichao et al., which is used to detect temperature changes during the charging and discharging process of lithium batteries.

[0004] Therefore, there is an urgent need to develop a method that can observe and study the dynamic process information such as the generation, consumption, transport and spatial distribution of ions in aqueous ion batteries during the charging and discharging process with high spatiotemporal resolution in situ. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the invention, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0007] Therefore, the purpose of this invention is to overcome the shortcomings of the prior art and provide an optical in-situ observation method for aqueous batteries.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including, The aqueous battery was placed on the stage of a total internal reflection fluorescence microscope. 0 or 2-5 wt% fluorescent probe was added to the electrolyte of the aqueous battery. The aqueous battery was then connected to a blue battery tester, and the tester was set to 1-5 mA cm⁻¹. -2Charge and discharge tests were conducted on the battery to observe the lithium dendrite growth process at the negative electrode and the fluorescence changes between the positive and negative electrodes, thereby obtaining dynamic information on the generation, consumption, transport, and spatial distribution of lithium ions.

[0009] As a preferred embodiment of the optical in-situ observation method for aqueous batteries described in this invention, the aqueous batteries include, but are not limited to, aqueous lithium-ion batteries, aqueous zinc-ion batteries, and lead-acid batteries.

[0010] As a preferred embodiment of the optical in-situ observation method for the aqueous battery described in this invention, the aqueous battery comprises: Battery casing 1; The positive electrode 2 includes a positive electrode current collector 21 and a positive electrode active material 22 coated on the surface of the positive electrode current collector; The negative electrode 3 includes a negative electrode current collector 31 and a negative electrode active material 32 coated on the surface of the negative electrode current collector; Ionized electrolyte 4; The encapsulating adhesive 5 is used to encapsulate the positive electrode 2, negative electrode 3, fluorescent ion electrolyte 4, and battery casing 1 into one unit; The tape 6 includes a conductive tape 61 for connecting the positive electrode 1 and the negative electrode 2 and a double-sided tape 62 for making the electrolyte chamber. The battery casing 1 is made of an optically transparent material and serves as an optical observation window. The positive electrode 2, negative electrode 3, fluorescent ion electrolyte 4, encapsulating adhesive 5, and tape 6 are disposed inside the battery casing 1. The positive electrode 2 and negative electrode 3 are located on both sides inside the battery casing 6.

[0011] In a preferred embodiment of the optical in-situ observation method for the aqueous battery described in this invention, the concentration of the ionic electrolyte is 0.01-0.55M.

[0012] As a preferred embodiment of the optical in-situ observation method for the aqueous battery described in this invention, wherein: when the aqueous battery is an aqueous lithium-ion battery, the positive electrode current collector 21 is aluminum foil, the positive electrode active material 22 includes one or more of lithium manganese oxide, lithium cobalt oxide, lithium iron phosphate, and ternary materials, the negative electrode current collector 31 is copper foil, the negative electrode active material 32 includes one or more of graphite, lithium titanate, lithium vanadate, and silicon carbide, the ion electrolyte includes one or more of lithium nitrate and lithium sulfate, and the fluorescent probe is 1,8-dihydroxyanthraquinone.

[0013] As a preferred embodiment of the optical in-situ observation method for the aqueous battery described in this invention, wherein: when the aqueous battery is an aqueous zinc-ion battery, the positive electrode current collector 21 is titanium foil, the positive electrode active material 22 includes one or more of manganese dioxide and vanadium pentoxide, the negative electrode current collector 31 is tin foil, the negative electrode active material 32 is zinc, the ion electrolyte includes one or more of zinc sulfate, zinc nitrate, and zinc acetate, and the fluorescent probe is one or more of TSQ and ZnAF-1.

[0014] As a preferred embodiment of the optical in-situ observation method for the aqueous battery described in this invention, wherein: when the aqueous battery is a lead-acid battery, the positive electrode current collector 21 is graphite, the positive electrode active material 22 is lead dioxide, the negative electrode current collector 31 is graphite, the negative electrode active material 32 is lead, the ion electrolyte is sulfuric acid, and the fluorescent probe is trisodium 8-aminopyrene-1,3,6-trisulfonate.

[0015] As a preferred embodiment of the optical in-situ observation method for the aqueous battery described in this invention, the material of the battery casing 1 includes one or more of quartz and optical glass.

[0016] As a preferred embodiment of the optical in-situ observation method for aqueous batteries described in this invention, the encapsulating adhesive 5 includes one or more of the following: RY-3202 soft-pack lithium battery encapsulating adhesive, two-component silicone potting compound, two-component AB glue epoxy resin potting compound, and 908 thermally conductive potting compound; the conductive tape 61 includes one or more of the following: double-sided conductive copper foil tape and double-sided conductive aluminum foil tape; the double-sided tape 62 includes one or more of the following: 3M waterproof 3mm sponge adhesive and nano double-sided waterproof adhesive.

[0017] As a preferred embodiment of the optical in-situ observation method for the aqueous battery described in this invention, the method for preparing the aqueous battery includes: After the positive electrode material, acetylene black, binder and solvent are mixed evenly, the resulting slurry is coated on the surface of the positive electrode current collector, dried, stamped, sheared and weighed to obtain the positive electrode sheet; After the negative electrode material, acetylene black, binder and solvent are mixed evenly, the resulting slurry is coated on the surface of the negative electrode current collector, dried, stamped, sheared and weighed to obtain the negative electrode sheet. A fluorescent ion electrolyte is prepared by adding a fluorescent probe and mixing thoroughly. The electrolyte chamber is made using double-sided tape. The prepared positive electrode, negative electrode, fluorescent lithium-ion electrolyte, and quartz battery shell are then encapsulated together with encapsulating adhesive. The positive and negative electrode plates are connected with conductive tape to obtain an optically observable aqueous battery.

[0018] Beneficial effects of this invention: (1) This invention provides an in-situ optical observation method for aqueous batteries, which can be combined with fluorescence microscopy to observe the dynamic process information such as the generation, consumption, transport and spatial distribution of ions during the charging and discharging process of aqueous batteries, and can also observe the growth process of lithium dendrites. This is of great value for revealing the battery degradation mechanism, extending life, optimizing battery design and improving performance. It provides a simple and effective technical means to reveal the ion transport mechanism during the charging and discharging process of aqueous batteries and to establish the intrinsic law between ion transport and battery performance.

[0019] (2) In addition, the optical in-situ observation method for aqueous batteries provided by the present invention is universally applicable to aqueous batteries and can be used for lead-acid batteries, aqueous lithium-ion batteries, aqueous zinc-ion batteries, etc.

[0020] (3) Compared with the prior art, the present invention maintains nanometer-level resolution while keeping the imaging time at the millisecond level, thereby achieving high spatiotemporal resolution in-situ observation of the transport behavior of reactive ions during the charging and discharging process of aqueous ion batteries. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the aqueous lithium-ion battery in Embodiment 1 of the present invention.

[0023] Figure 2 The lithium dendrites observed in Example 2 of this invention at a current density of 1 mA cm⁻¹ -2 Growth images at that time.

[0024] Figure 3 This is a fluorescence change diagram of an aqueous lithium-ion battery observed during the charging process in Example 3 of the present invention.

[0025] Figure 4 This is a fluorescence change diagram of an aqueous zinc-ion battery observed during the entire charging and discharging process in Example 5 of the present invention.

[0026] Figure 5 This is a fluorescence change diagram of a lead-acid battery observed during the entire charging and discharging process in Example 7 of the present invention.

[0027] Reference numerals: 1-Battery casing; 2-Positive electrode, 21-Positive electrode current collector, 22-Positive electrode active material; 3-Negative electrode, 31-Negative electrode current collector, 32-Negative electrode active material; 4-Fluorescent ion electrolyte; 5-Encapsulating adhesive; 6-Tape, 61-Conductive tape, 62-Double-sided tape. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the examples in the specification.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1 This embodiment provides an aqueous lithium-ion battery, the structure of which is as follows: Figure 1 As shown, specifically including, Battery casing 1, made of quartz; The positive electrode 2 is composed of an aluminum foil current collector 21 and a positive electrode active material lithium manganese oxide 22 coated on the surface of the current collector; The negative electrode 3 is composed of a copper foil current collector 31 and a negative electrode active material graphite 32 coated on the surface of the current collector; Ion electrolyte 4 is 0.5M lithium sulfate; Encapsulating adhesive 5 is a two-component AB glue epoxy resin potting compound used to encapsulate the positive electrode 2, negative electrode 3, fluorescent ion electrolyte 4, and battery casing 1 into one unit. Tape 6, double-sided conductive copper foil conductive tape 61 for connecting positive electrode 1 and negative electrode 2, and 3M waterproof 3mm sponge double-sided tape 62 for making electrolyte chamber; The battery casing 1 is made of an optically transparent material and serves as an optical observation window. The positive electrode 2, negative electrode 3, fluorescent ion electrolyte 4, encapsulating adhesive 5, and tape 6 are disposed inside the battery casing 1. The positive electrode 2 and negative electrode 3 are located on both sides inside the battery casing 6.

[0032] Example 2 This embodiment provides an in-situ optical observation method for aqueous lithium-ion batteries, specifically a method for observing the growth of dendrites on the negative electrode during the charging and discharging process of lithium-ion batteries: The aqueous lithium-ion battery of Example 1 was placed on the stage of a total internal reflection fluorescence microscope. The electrolyte of this aqueous lithium-ion battery was 0.5M lithium sulfate. The aqueous lithium-ion battery was connected to a Blue Battery Tester (model CT3004A), and a 1mA cm⁻¹ pressure was applied. -2 Charge and discharge tests were conducted on the battery to observe the lithium dendrite growth process at the negative electrode.

[0033] Figure 2 The lithium dendrites observed in Example 2 at a current density of 1 mA cm⁻¹ -2 Growth images at that time.

[0034] Example 3 This embodiment provides an in-situ optical observation method for aqueous lithium-ion batteries, specifically a method for observing the generation and consumption of lithium ions during the charging and discharging process of aqueous lithium-ion batteries: The aqueous lithium-ion battery from Example 1 was placed on the stage of a total internal reflection fluorescence microscope. 2 wt% of the fluorescent probe 1,8-dihydroxyanthraquinone was added to a 0.5 M lithium sulfate electrolyte. The aqueous lithium-ion battery was connected to a Blue Battery Tester (model CT3004A), and a 1 mA cm⁻¹ setting was used. -2 Perform charge and discharge tests on the battery and observe the fluorescence changes between the positive and negative electrodes.

[0035] Figure 3 This is a fluorescence change diagram of an aqueous lithium-ion battery during the charging process, which allows observation of dynamic information such as the generation, consumption, transport, and spatial distribution of lithium ions.

[0036] Example 4 This embodiment provides an aqueous zinc-ion battery, specifically including... Battery casing 1, made of quartz; The positive electrode 2 is composed of a titanium foil current collector 21 and a positive electrode active material manganese dioxide 22 coated on the surface of the current collector; The negative electrode 3 is composed of a tin foil current collector 31 and a negative electrode active material zinc 32 coated on the surface of the current collector; Ionized electrolyte 4, 0.5M zinc sulfate; Encapsulating adhesive 5 is a two-component AB glue epoxy resin potting compound used to encapsulate the positive electrode 2, negative electrode 3, fluorescent ion electrolyte 4, and battery casing 1 into one unit. Tape 6, double-sided conductive copper foil conductive tape 61 for connecting positive electrode 1 and negative electrode 2, and 3M waterproof 3mm sponge double-sided tape 62 for making electrolyte chamber; The battery casing 1 is made of an optically transparent material and serves as an optical observation window. The positive electrode 2, negative electrode 3, fluorescent ion electrolyte 4, encapsulating adhesive 5, and tape 6 are disposed inside the battery casing 1. The positive electrode 2 and negative electrode 3 are located on both sides inside the battery casing 6.

[0037] Example 5 This embodiment provides an in-situ optical observation method for aqueous zinc-ion batteries, specifically a method for observing the generation and consumption of zinc ions during the charging and discharging process of aqueous zinc-ion batteries: The aqueous zinc-ion battery of Example 4 was placed on the stage of a total internal reflection fluorescence microscope. 2 wt% of the fluorescent probe ZnAF-1 was added to a 0.5 M zinc sulfate electrolyte. The aqueous zinc-ion battery was connected to a blue battery tester (model CT3004A). A 1 mA cm⁻¹ tester was used. -2 Perform charge and discharge tests on the battery and observe the fluorescence changes between the positive and negative electrodes.

[0038] Figure 4 This is a fluorescence change diagram of an aqueous zinc-ion battery during the entire charging and discharging process, which allows observation of dynamic information such as the generation, consumption, transport, and spatial distribution of zinc ions.

[0039] Example 6 This embodiment provides a lead-acid battery, specifically including... Battery casing 1, made of quartz; The positive electrode 2 is composed of a graphite current collector 21 and a positive electrode active material 22 coated on the surface of the current collector; The negative electrode 3 is composed of a graphite current collector 31 and a negative electrode active material 32 coated on the surface of the current collector; Ionized electrolyte 4, 0.01M sulfuric acid; Encapsulating adhesive 5 is a two-component AB glue epoxy resin potting compound used to encapsulate the positive electrode 2, negative electrode 3, fluorescent ion electrolyte 4, and battery casing 1 into one unit. Tape 6, double-sided conductive copper foil conductive tape 61 for connecting positive electrode 1 and negative electrode 2, and 3M waterproof 3mm sponge double-sided tape 62 for making electrolyte chamber; The battery casing 1 is made of an optically transparent material and serves as an optical observation window. The positive electrode 2, negative electrode 3, fluorescent ion electrolyte 4, encapsulating adhesive 5, and tape 6 are disposed inside the battery casing 1. The positive electrode 2 and negative electrode 3 are located on both sides inside the battery casing 6.

[0040] Example 7 This embodiment provides an in-situ optical observation method for lead-acid batteries, specifically a method for observing the proton generation and consumption processes during the charging and discharging of lead-acid batteries: The lead-acid battery from Example 6 was placed on the stage of a total internal reflection fluorescence microscope. 2 wt% of the fluorescent probe 8-aminopyrene-1,3,6-trisulfonic acid trisodium salt was added to a 0.01 M sulfate electrolyte. The lead-acid battery was then connected to a blue battery tester, and a 1 mA cm⁻¹ setting was used with a CT3004A blue battery tester. -2 Perform charge and discharge tests on the battery and observe the fluorescence changes between the positive and negative electrodes.

[0041] Figure 5 This is a fluorescence change diagram of a lead-acid battery throughout the entire charging and discharging process, which allows observation of dynamic information such as proton generation, consumption, transport, and spatial distribution.

[0042] Comparative Example 1 The difference between this comparative example and Example 3 is that the amount of fluorescent probe added was adjusted to 1 wt% and 6 wt%, respectively, while the rest were the same as in Example 3. The results showed that no dynamic changes in lithium ion generation, consumption, transport, and spatial distribution could be observed.

[0043] Comparative Example 2 The difference between this comparative example and Example 3 is that the fluorescent probe 1,8-dihydroxyanthraquinone was replaced with 9,10-dimethylanthracene; all other aspects were the same as in Example 3. No dynamic changes in lithium-ion generation, consumption, transport, and spatial distribution were observed.

[0044] Comparative Example 3 The difference between this comparative example and Example 4 is that zinc foil was used as the negative electrode current collector; otherwise, they were the same as in Example 4. The results showed that no dynamic changes in zinc ion generation, consumption, transport, and spatial distribution could be observed.

[0045] Comparative Example 4 The difference between this comparative example and Example 5 is that the amount of fluorescent probe ZnAF-1 added was adjusted to 10 wt%, while the rest were the same as in Example 5. The results showed that no dynamic changes in zinc ion generation, consumption, transport, and spatial distribution could be observed.

[0046] Comparative Example 5 The difference between this comparative example and Example 6 is that lead foil is used as the negative electrode current collector; otherwise, they are the same as in Example 6. No dynamic changes in proton generation, consumption, transport, and spatial distribution can be observed.

[0047] Comparative Example 6 The difference between this comparative example and Example 7 is that the sulfuric acid concentration was adjusted to 0.1M, while all other aspects were the same as in Example 7. No dynamic changes in proton generation, consumption, transport, and spatial distribution could be observed.

[0048] In summary, this invention provides an in-situ optical observation method for aqueous batteries, including but not limited to aqueous lithium-ion batteries, aqueous zinc-ion batteries, and lead-acid batteries. Applying this invention allows for real-time observation of ion transport behavior in aqueous batteries, obtaining dynamic information such as ion generation, consumption, transport, and spatial distribution. Furthermore, this invention is simple, convenient, and highly repeatable. Compared to existing technologies, this invention maintains nanometer-level resolution while keeping imaging time at the millisecond level, achieving high spatiotemporal resolution in-situ observation of the transport behavior of reactive ions during the charging and discharging process of aqueous batteries.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An in-situ optical observation method for aqueous batteries, characterized in that: include, The aqueous battery was placed on the stage of a total internal reflection fluorescence microscope. 0 or 2-5 wt% fluorescent probe was added to the electrolyte of the aqueous battery. The aqueous battery was then connected to a blue battery tester, and the tester was set to 1-5 mA cm⁻¹. -2 Charge and discharge tests were conducted on the battery to observe the lithium dendrite growth process at the negative electrode and the fluorescence changes between the positive and negative electrodes, thereby obtaining dynamic information on the generation, consumption, transport, and spatial distribution of lithium ions.

2. The optical in-situ observation method for aqueous batteries as described in claim 1, characterized in that: The aqueous batteries include, but are not limited to, aqueous lithium-ion batteries, aqueous zinc-ion batteries, and lead-acid batteries.

3. The optical in-situ observation method for aqueous batteries as described in claim 2, characterized in that: The aqueous battery includes, Battery casing (1); The positive electrode (2) includes a positive electrode current collector (21) and a positive electrode active material (22) coated on the surface of the positive electrode current collector. The negative electrode (3) includes a negative electrode current collector (31) and a negative electrode active material (32) coated on the surface of the negative electrode current collector. Ionized electrolyte (4); Encapsulating adhesive (5) is used to encapsulate the positive electrode (2), negative electrode (3), fluorescent ion electrolyte (4), and battery casing (1) into one unit; The tape (6) includes a conductive tape (61) for connecting the positive electrode (1) and the negative electrode (2) and a double-sided tape (62) for making the electrolyte chamber. The battery casing (1) is made of an optically transparent material and serves as an optical observation window. The positive electrode (2), negative electrode (3), fluorescent ion electrolyte (4), encapsulating adhesive (5), and tape (6) are disposed inside the battery casing (1). The positive electrode (2) and negative electrode (3) are located on both sides inside the battery casing (6).

4. The optical in-situ observation method for aqueous batteries as described in claim 3, characterized in that: The concentration of the ion electrolyte is 0.01-0.55M.

5. The optical in-situ observation method for aqueous batteries as described in claim 3, characterized in that: When the aqueous battery is an aqueous lithium-ion battery, the positive electrode current collector (21) is aluminum foil, the positive electrode active material (22) includes one or more of lithium manganese oxide, lithium cobalt oxide, lithium iron phosphate, and ternary materials, the negative electrode current collector (31) is copper foil, the negative electrode active material (32) includes one or more of graphite, lithium titanate, lithium vanadate, and silicon carbon, the ion electrolyte includes one or more of lithium nitrate and lithium sulfate, and the fluorescent probe is 1,8-dihydroxyanthraquinone.

6. The optical in-situ observation method for aqueous batteries as described in claim 3, characterized in that: When the aqueous battery is an aqueous zinc-ion battery, the positive electrode current collector (21) is titanium foil, the positive electrode active material (22) includes one or more of manganese dioxide and vanadium pentoxide, the negative electrode current collector (31) is tin foil, the negative electrode active material (32) is zinc, the ion electrolyte includes one or more of zinc sulfate, zinc nitrate and zinc acetate, and the fluorescent probe is one or more of TSQ and ZnAF-1.

7. The optical in-situ observation method for aqueous batteries as described in claim 3, characterized in that: When the aqueous battery is a lead-acid battery, the positive electrode current collector (21) is graphite, the positive electrode active material (22) is lead dioxide, the negative electrode current collector (31) is graphite, the negative electrode active material (32) is lead, the ionic electrolyte is sulfuric acid, and the fluorescent probe is trisodium 8-aminopyrene-1,3,6-trisulfonic acid.

8. The optical in-situ observation method for aqueous batteries as described in claim 3, characterized in that: The battery casing (1) is made of one or more of the following materials: quartz and optical glass.

9. The optical in-situ observation method for aqueous batteries as described in claim 3, characterized in that: The encapsulating adhesive (5) includes one or more of the following: RY-3202 soft-pack lithium battery encapsulating adhesive, two-component silicone potting adhesive, two-component AB glue epoxy resin potting adhesive, and 908 thermally conductive potting adhesive; the conductive tape (61) includes one or more of the following: double-sided conductive copper foil tape and double-sided conductive aluminum foil tape; the double-sided tape (62) includes one or more of the following: 3M waterproof 3mm sponge adhesive and nano double-sided waterproof adhesive.

10. The optical in-situ observation method for aqueous batteries as described in claim 3, characterized in that: The method for preparing the aqueous battery includes, After the positive electrode material, acetylene black, binder and solvent are mixed evenly, the resulting slurry is coated on the surface of the positive electrode current collector, dried, stamped, sheared and weighed to obtain the positive electrode sheet; After the negative electrode material, acetylene black, binder and solvent are mixed evenly, the resulting slurry is coated on the surface of the negative electrode current collector, dried, stamped, sheared and weighed to obtain the negative electrode sheet. A fluorescent ion electrolyte is prepared by adding a fluorescent probe and mixing thoroughly. The electrolyte chamber is made using double-sided tape. The prepared positive electrode, negative electrode, fluorescent lithium-ion electrolyte, and quartz battery shell are then encapsulated together with encapsulating adhesive. The positive and negative electrode plates are connected with conductive tape to obtain an optically observable aqueous battery.

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