Preparation method and application of Cu3 (OH) 2V2O7. 2H2O material

Abstract

The invention discloses a preparation method and application of a Cu3 (OH) 2V2O7. 2H2O material. Cu3 (OH) 2V2O7. 2H2O is synthesized through a one-step hydrothermal method by taking copper acetate and sodium orthovanadate as raw materials, and the Cu3 (OH) 2V2O7. 2H2O with uniform and fine particle size distribution is obtained by controlling the ratio of the copper acetate to the sodium orthovanadate as the raw materials to be 1: (0.5-3) and the reaction temperature to be 90-150 DEG C; the specific surface area and the number of active sites of the material are increased, the material is applied to an ammonium ion battery electrode material, a stable intercalation structure can be provided for ammonium ions, reversible intercalation and deintercalation of ions are achieved, good capacitance and stability are achieved, and the problem that existing copper vanadate is unstable in electrical performance in an ammonium ion battery is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of battery electrode material preparation, and more specifically, relates to a preparation method and application of a Cu3(OH)2V2O7·2H2O material. Background Art

[0002] Ammonium ion batteries are a type of rechargeable battery. Ammonium ion aqueous solution has the advantages of high ionic conductivity, small hydrated ion radius, light molar mass, and the hydrolysis of ammonium salts helps to establish a weakly acidic or neutral electrolyte environment. It is less corrosive, can form hydrogen bonds different from metal ions, and has abundant reserves in nature. It has emerged and developed in recent years.

[0003] Vanadium oxide electrode materials are considered to be a highly competitive next-generation electrode material due to their high capacity, abundant reserves, and low cost. Vanadates, as derivatives of vanadium oxides, are widely used in aqueous batteries because they have a variety of cations. The cations in vanadates act as pillars and are inserted into different vanadium oxide layers to form various types of vanadates with highly stable structures. At present, only ammonium vanadate, iron vanadate oxide, and barium vanadate oxide have certain ammonium storage properties and can be used as electrode materials in ammonium ion batteries, while more types of vanadates need to be developed and studied.

[0004] The copper in copper vanadate has multi-step reducibility, and has the characteristics of high specific capacity, good cycle stability and high energy density, and can be used in battery materials. And because both vanadium and copper have more valence states, the types of coordination formed by the two are also more. For example, CN201811343067.X discloses a method for preparing copper vanadate, and the copper vanadate prepared by the method and its application in lithium-ion batteries discloses first preparing a vanadium copper precursor with o-phenanthroline as an organic ligand under hydrothermal conditions, and then heat-treating it at high temperature to obtain granular CuV2O6. This material is used as a negative electrode material for lithium-ion batteries, and the battery capacity has been significantly improved, and it can maintain good cycle stability in lithium-ion batteries. CN201410176294.3 discloses a copper vanadate nanoparticle and a method for preparing it discloses the use of a one-step hydrothermal method combined with high-temperature heat treatment to prepare Cu5V2O6. 10 . This material has the advantage of high discharge capacity as the positive electrode active material of lithium primary batteries. Although copper vanadate has good stability and capacity as an electrode material in lithium-ion batteries, in ammonium-ion batteries, the radius of lithium ions (76pm) is much smaller than other cations in the same family, and is much different from the radius of ammonium ions (143pm). Most electrode materials with layered structures have interlayer spacing that meets the requirements of Li + , but not enough to accommodate NH4 +, which makes the electrode materials in lithium-ion batteries not suitable for ammonium-ion batteries. The performance of the same material in lithium-ion batteries and ammonium-ion batteries is different. In addition, different forms of copper vanadate have different ion tolerances, which will also affect the electrochemical performance when used as electrode materials. Therefore, it is necessary to obtain and determine the copper vanadate materials suitable for ammonium-ion battery electrode materials for use in ammonium-ion batteries. Summary of the invention

[0005] The invention provides a method for preparing a Cu3(OH)2V2O7·2H2O material in order to overcome the problem that the motor material performance of the existing copper vanadate material in an ammonium ion battery is unstable.

[0006] Another technical problem solved by the present invention is to provide application of Cu3(OH)2V2O7·2H2O material prepared by the above method.

[0007] The present invention is achieved through the following technical solutions:

[0008] A method for preparing a Cu3(OH)2V2O7·2H2O material, comprising the following steps:

[0009] S1. dissolving copper acetate and sodium orthovanadate in water at a molar ratio of 1:0.5 to 3 to obtain a mixed solution;

[0010] S2. The mixed solution is heated to 90-150°C, reacted for 10-14h, and cooled to obtain a reaction mass;

[0011] S3. Separate, clean and dry the reaction materials to obtain Cu3(OH)2V2O7·2H2O material.

[0012] Furthermore, the ratio of the amount of copper acetate to sodium orthovanadate is 1:2.

[0013] Furthermore, the concentration of cupric acetate in the mixed solution is 0.02-0.2M, and the concentration of sodium orthovanadate is 0.04-0.4M.

[0014] Preferably, the concentration of cupric acetate in the mixed solution is 0.02M, and the concentration of sodium orthovanadate is 0.04M.

[0015] Furthermore, the heating temperature is 90° C. and the reaction time is 12 hours.

[0016] Furthermore, the drying temperature is 50-70° C., and the drying time is 10-12 hours.

[0017] The Cu3(OH)2V2O7·2H2O material obtained by the above preparation method is in the form of nanoparticles and is applied to electrode materials of aqueous ammonium ion batteries. Specifically, it is applied to negative electrode materials of aqueous ammonium ion batteries.

[0018] Furthermore, the preparation steps of the aqueous ammonium ion battery electrode material include: mixing and grinding Cu3(OH)2V2O7·2H2O material, acetylene black and a binder, adding a conductive agent to form a uniform slurry, coating, and drying to obtain the aqueous ammonium ion battery electrode material.

[0019] Furthermore, the mass ratio of the Cu3(OH)2V2O7·2H2O material, acetylene black and binder is 7:2:1.

[0020] Compared with the prior art, the beneficial effects are:

[0021] The invention uses copper acetate and sodium orthovanadate as raw materials and synthesizes Cu3(OH)2V2O7·2H2O through a one-step hydrothermal method. The invention obtains nano-particle Cu3(OH)2V2O7·2H2O by strictly controlling the ratio of the raw materials copper acetate and sodium orthovanadate, as well as the concentration and temperature of reactants. The nano-particle Cu3(OH)2V2O7·2H2O is applied to ammonium ion battery electrode materials, can provide a stable intercalation structure for ammonium ions, realize reversible insertion and extraction of ions, and has good capacitance and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 These are electron microscope images of Cu3(OH)2V2O7·2H2O materials prepared in different ratios in Examples 1 to 4, (a) 1:1, (b) 1:2, (c) 1:3, and (d) 2:1.

[0023] Figure 2 These are the electron microscope images of Cu3(OH)2V2O7·2H2O materials prepared at different temperatures in Examples 2, 5, and 6, (a) 90°C, (b) 120°C, and (c) 150°C.

[0024] Figure 3 (a) XRD test and (b) FT-IR characterization diagram of the Cu3(OH)2V2O7·2H2O material prepared in Example 5.

[0025] Figure 4 The discharge specific capacity detection diagram of aqueous ammonium ion battery electrode materials at different current densities prepared with Cu3(OH)2V2O7·2H2O materials using different raw material ratios.

[0026] Figure 5 This is a detection diagram of the discharge specific capacity of aqueous ammonium ion battery electrode materials prepared with Cu3(OH)2V2O7·2H2O materials at different temperatures at different current densities.

[0027] Figure 6 These are sampling diagrams of products prepared at different reaction concentrations.

[0028] Figure 7 Figure 2 shows the dried products prepared at different reaction concentrations. DETAILED DESCRIPTION

[0029] The following is further explained and illustrated in conjunction with the examples, but the specific examples do not limit the present invention in any form. If not specifically stated, the methods and equipment used in the examples are conventional methods and equipment in the art, and the raw materials used are all conventional commercially available raw materials.

[0030] Example 1

[0031] This embodiment provides a method for preparing a Cu3(OH)2V2O7·2H2O material, the preparation steps comprising:

[0032] S1. Take anhydrous copper acetate and sodium orthovanadate in a molar ratio of 1:1, add them into 50 mL of deionized water, and stir to dissolve to obtain a yellow mixed solution.

[0033] S2. Heat the yellow mixed solution in S1 to 150°C and react for 12 hours. After the reaction, cool naturally to room temperature.

[0034] S3. Add 20 ml of anhydrous ethanol to the precipitate solution after the reaction and stir for 10 minutes. Then, centrifuge the solution at 7000 rad / min for 10 minutes, pour out the supernatant and leave the yellow precipitate. Wash the yellow precipitate with deionized water to remove other impurities, and dry it at 60°C for 12 hours to obtain Cu3(OH)2V2O7·2H2O material.

[0035] Example 2

[0036] This embodiment provides a method for preparing a Cu3(OH)2V2O7·2H2O material, the preparation steps comprising:

[0037] S1. Take anhydrous copper acetate and sodium orthovanadate in a molar ratio of 1:2, add them into 50 mL of deionized water, and stir to dissolve to obtain a yellow mixed solution.

[0038] S2. Heat the yellow mixed solution in S1 to 150°C and react for 12 hours. After the reaction, cool naturally to room temperature.

[0039] S3. Add 20 ml of anhydrous ethanol to the precipitate solution after the reaction and stir for 10 minutes. Then, centrifuge the solution at 7000 rad / min for 10 minutes, pour out the supernatant and leave the yellow precipitate. Wash the yellow precipitate with deionized water to remove other impurities, and dry it at 60°C for 12 hours to obtain Cu3(OH)2V2O7·2H2O material.

[0040] Example 3

[0041] This embodiment provides a method for preparing a Cu3(OH)2V2O7·2H2O material, the preparation steps comprising:

[0042] S1. Take anhydrous copper acetate and sodium orthovanadate in a molar ratio of 1:3, add them into 50 mL of deionized water, and stir to dissolve to obtain a yellow mixed solution.

[0043] S2. Heat the yellow mixed solution in S1 to 150°C and react for 12 hours. After the reaction, cool naturally to room temperature.

[0044] S3. Add 20 ml of anhydrous ethanol to the precipitate solution after the reaction and stir for 10 minutes. Then, centrifuge the solution at 7000 rad / min for 10 minutes, pour out the supernatant and leave the yellow precipitate. Wash the yellow precipitate with deionized water to remove other impurities, and dry it at 60°C for 12 hours to obtain Cu3(OH)2V2O7·2H2O material.

[0045] Example 4

[0046] This embodiment provides a method for preparing a Cu3(OH)2V2O7·2H2O material, the preparation steps comprising:

[0047] S1. Take anhydrous copper acetate and sodium orthovanadate in a molar ratio of 2:1, add them into 50 mL of deionized water, and stir to dissolve to obtain a yellow mixed solution.

[0048] S2. Heat the yellow mixed solution in S1 to 150°C and react for 12 hours. After the reaction, cool naturally to room temperature.

[0049] S3. Add 20 ml of anhydrous ethanol to the precipitate solution after the reaction and stir for 10 minutes. Then, centrifuge the solution at 7000 rad / min for 10 minutes, pour out the supernatant and leave the yellow precipitate. Wash the yellow precipitate with deionized water to remove other impurities, and dry it at 60°C for 12 hours to obtain Cu3(OH)2V2O7·2H2O material.

[0050] Example 5

[0051] The preparation process of this embodiment is the same as that of Example 2, except that the reaction temperature in this embodiment is 90° C. and the reaction time is 12 h.

[0052] Example 6

[0053] The preparation process of this embodiment is the same as that of Example 2, except that the reaction temperature in this embodiment is 120° C. and the reaction time is 12 h.

[0054] Example 7

[0055] This embodiment provides a method for preparing an aqueous ammonium ion battery electrode material, the steps comprising:

[0056] The prepared Cu3(OH)2V2O7·2H2O material, acetylene black and binder PVDF were mixed and ground in a mass ratio of 7:2:1, and a conductive agent NMP was added to form a uniform slurry, which was then coated and dried to obtain an aqueous ammonium ion battery electrode material.

[0057] The products synthesized at different ratios in Examples 1 to 4 were analyzed by scanning electron microscopy. Figure 1 As can be seen from the figure, the whole material is nanoparticles. In the microscopic morphology of the product in the ratio of 1:1 (a), there are many slender nanoparticles stacked; in the microscopic morphology of the product in the ratio of 1:2 (b), the nanoparticles are relatively evenly distributed; in the microscopic morphology of the product in the ratio of 1:3 (c), the nanoparticles are partially embedded: in the microscopic morphology of the product in the ratio of 2:1 (d), the particle size is significantly larger than other products, and there is also an embedded phenomenon. That is, when the mass ratio of copper to vanadium is adjusted, the microscopic morphology of the Cu3(OH)2V2O7·2H2O material will change. Specifically, when the ratio is optimized to a specific value (1:2), the material may show a more uniform and fine nanostructure, which helps to increase the specific surface area and the number of active sites of the material.

[0058] The products synthesized at different temperatures in Examples 2, 5 and 6 were analyzed by scanning electron microscope. Figure 2 As can be seen, the whole is nanoparticles. arrive Then , the morphology of the product gradually changes from densely distributed nanoparticles to a more sparse nanostructure with increased particle size. That is, when the synthesis temperature is adjusted, the microscopic morphology of the Cu3(OH)2V2O7·2H2O material will change. Specifically, when the temperature is optimized to a specific value (90°C), the material may show a more uniform and fine nanostructure, which helps to increase the specific surface area and the number of active sites of the material, and show higher capacity and better electrochemical performance.

[0059] According to the SEM images, the relevant particle size parameters were measured and calculated, as shown in Table 1 below:

[0060] Table 1

[0061]

[0062] The Cu3(OH)2V2O7·2H2O material prepared in Example 5 was characterized by XRD and FT-IR. The prepared sample was tested by XRD. The results are as follows: Figure 3 As shown in (a), it can be seen that obvious diffraction peaks such as (001), (11-2), (220) and (221) can be observed at diffraction angles 2θ = 12.3°, 29.8°, 35° and 37.8°, and the XRD curve is highly consistent with the standard card PDF#46-1443 of Cu3(OH)2V2O7·2H2O.

[0063] In order to further explore the phase composition of the samples, the samples were tested by Fourier transform infrared spectroscopy.

[0065] from Figure 3 It can be clearly seen in (b) that the -1 Band and 1615cm -1 The characteristic peaks of the band correspond to the symmetric vibration and bending vibration of the HOH bond, located at 904 cm -1 Band and 756cm -1 The characteristic peak of the band corresponds to the vibration of Cu-O-Cu bond and is located at 800 cm -1 The characteristic peak of the band corresponds to the vibration of the VOV bond and is located at 847 cm -1 The characteristic peaks correspond to the vibration of V=O bond. FT-IR curve further verifies that the synthesized substance is Cu3(OH)2V2O7·2H2O.

[0069] The aqueous ammonium ion battery electrode materials prepared by the method described in Example 7 using the Cu3(OH)2V2O7·2H2O materials in Examples 1 to 4 were respectively tested for electrochemical properties. The test results of the discharge specific capacities of the three materials at different current densities are shown in Table 2 below:

[0070] Table 2

[0071]

[0072]

[0073] The products synthesized at different ratios of anhydrous copper acetate and sodium orthovanadate (1:1, 1:2, 1:3, 2:1) were prepared into electrodes and their rate performance was tested, as shown in Table 2 and Figure 4As shown, the Cu3(OH)2V2O7·2H2O (1:1) samples were -1 The current densities were 40.5, 30.7, 24.5, 17.2 and 11.1 mAh g -1 The discharge capacity is 0.1A·g -1 The specific capacity returned to 38.6 mAh g -1 ; Cu3(OH)2V2O7·2H2O(1:2) samples at 0.1, 0.2, 0.3, 0.5 and 1.0 A·g -1 The current densities were 79.8, 75.1, 66.8, 50.3 and 23.8 mAh g -1 When the current density returns to 0.1A·g -1 The specific capacity returned to 79.2 mAh g -1 Cu3(OH)2V2O7·2H2O(1:3) samples at 0.1, 0.2, 0.3, 0.5 and 1.0 A·g -1 The current densities were 33.1, 25.4, 20.2, 14.9 and 9.3 mAh g -1 When the current density returns to 0.1A·g -1 The specific capacity returned to 36.1 mAh g -1 Cu3(OH)2V2O7·2H2O (2:1) samples at 0.1, 0.2, 0.3, 0.5 and 1.0 A·g -1 The current densities were 21.5, 9.4, 8.7, 7.9 and 6.7 mAh g -1 When the current density returns to 0.1A·g -1 The specific capacity returned to 16.1 mAh g -1 When the ratio of anhydrous copper acetate to sodium orthovanadate is 1:2, it is the best performance ratio.

[0074] The aqueous ammonium ion battery electrode materials prepared by the method described in Example 7 using the Cu3(OH)2V2O7·2H2O materials in Example 2, Example 5 and Example 6 were tested for electrochemical performance. The test results of the discharge specific capacities of the three materials at different current densities are shown in Table 3 below:

[0075] Table 3

[0076] Current density 90℃ 120℃ 150℃ <![CDATA[0.1A g -1 ]]> <![CDATA[278.4mAh g -1 ]]> <![CDATA[153.1mAh g -1 ]]> <![CDATA[79.8mAh g -1 ]]> <![CDATA[0.2A g -1 ]]> <![CDATA[249.3mAh g -1 ]]> <![CDATA[128.6mAh g -1 ]]> <![CDATA[75.1mAh g -1 ]]> <![CDATA[0.3A g -1 ]]> <![CDATA[202mAh g -1 ]]> <![CDATA[116.9mAh g -1 ]]> <![CDATA[66.8mAh g -1 ]]> <![CDATA[0.5A g -1 ]]> <![CDATA[158.2mAh g -1 ]]> <![CDATA[94.6mAh g -1 ]]> <![CDATA[50.3mAh g -1 ]]> <![CDATA[1.0A g -1 ]]> <![CDATA[113.8mAh g -1 ]]> <![CDATA[50.6mAh g -1 ]]> <![CDATA[23.8mAh g -1 ]]> <![CDATA[Return to 0.1A g -1 > <![CDATA[283.2mAh g -1 ]]> <![CDATA[152.3mAh g -1 ]]> <![CDATA[79.2mAh g -1 ]]>

[0077] As shown in Table 3 and Figure 5As shown in (a), the Cu3(OH)2V2O7·2H2O (90℃) samples were subjected to the conditions of 0.1, 0.2, 0.3, 0.5 and 1.0 A·g -1 The current densities were 278.4, 249.3, 202, 158.2 and 113.8 mAh g -1 The discharge capacity is 0.1A·g -1 The specific capacity returned to 283.2 mAh g -1 ; Cu3(OH)2V2O7·2H2O (120℃) samples at 0.1, 0.2, 0.3, 0.5 and 1.0A·g -1 The current densities were 153.1, 128.6, 116.9, 94.6 and 50.6 mAh g -1 When the current density returns to 0.1A·g -1 The specific capacity returned to 153.1 mAh g -1 Cu3(OH)2V2O7·2H2O (150℃) samples at 0.1, 0.2, 0.3, 0.5 and 1.0 A·g -1 The current densities were 79.8, 75.1, 66.8, 50.3 and 23.8 mAh g -1 When the current density returns to 0.1A·g -1 The specific capacity returned to 79.2 mAh g -1 It can be seen that the discharge specific capacity of the Cu3(OH)2V2O7·2H2O material prepared in the present invention is significantly affected by temperature.

[0078] like Figure 5 As shown in (b), the Cu3(OH)2V2O7·2H2O (90℃) sample is at 0.1A·g -1 The discharge capacity after 100 cycles at a current density of 222.8 mAh g -1 , Cu3(OH)2V2O7·2H2O (120℃) sample at 0.1A·g -1 The discharge capacity after 100 cycles at a current density of 110 mAh g -1 , Cu3(OH)2V2O7·2H2O (150℃) sample at 0.1A·g -1 The discharge capacity after 100 cycles at a current density of 74.2 mAh g -1 .

[0079] like Figure 5 As shown in (c), the Cu3(OH)2V2O7·2H2O (90℃) sample is at 1.0A·g -1The discharge capacity after 1000 cycles at a current density of 83.4 mAh g -1 , Cu3(OH)2V2O7·2H2O (120℃) sample at 1.0A·g -1 The discharge capacity after 1000 cycles at a current density of 34.2 mAh g -1 , Cu3(OH)2V2O7·2H2O (150℃) sample at 1.0A·g -1 The discharge capacity after 1000 cycles at a current density of 20.3 mAh g -1 .

[0080] Example 8

[0081] When the ratio of copper acetate to sodium orthovanadate is 1:2 and the solvent ion water is 50 ml, the concentrations of the two are changed, that is, the concentrations of copper acetate are 0.04M, 0.06M, 0.1M and 0.2M, that is, 0.3632g, 0.5448g, 0.908g and 1.816g of anhydrous copper acetate are added respectively; the corresponding concentrations of sodium orthovanadate are 0.08M, 0.12M, 0.2M and 0.4M, that is, 0.7356g, 1.1034g, 1.839g and 3.678g of sodium orthovanadate are added respectively. The product is obtained after reacting at 90°C for 12 hours.

[0082] Figure 6 (ad) correspond to copper acetate concentrations of 0.04 M, 0.06 M, 0.1 M and 0.2 M, respectively. When the concentration is 0.04 M, the product sample is light yellow fine particles; when the concentration is 0.06 M, the product is a mixture of light yellow and brown, with a certain fluidity paste; when the concentration is 0.1 M, the product is a mixture of light yellow and brown, in the form of a paste; when the concentration is 0.2 M, the product is dark brown, and the whole is in block form.

[0083] After washing and drying the product, it is ground. Figure 7 (ae) correspond to 0.02M, 0.04M, 0.06M, 0.1M and 0.2M concentrations of copper acetate, respectively. Figure 7 (ae), Figure (a) is the product after grinding at 0.02M, which is a yellow-green powder for comparison; Figure (b) is the product after grinding at 0.04M, which is yellow-green and brown; Figure (c) is the product after grinding at 0.06M, which is brown; Figure (d) is the product after grinding at 0.1M, which is darker brown than Figure (c); Figure (e) is the product after grinding at 0.2M, which is darker reddish brown. Among them, the color of the product at 0.04M is close to that of the product at 0.02M. As the concentration increases, the color of the product deepens and the difference becomes larger.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for preparing Cu3(OH)2V2O7·2H2O material, characterized in that the steps include: S1. dissolving copper acetate and sodium orthovanadate in water at a molar ratio of 1:0.5 to 3 to obtain a mixed solution; S2. The mixed solution is heated to 90-150°C, reacted for 10-14h, and cooled to obtain a reaction mass; S3. Separate, clean and dry the reaction materials to obtain Cu3(OH)2V2O7·2H2O material.

2. The method for preparing the Cu3(OH)2V2O7·2H2O material according to claim 1, characterized in that: The amount ratio of the copper acetate to the sodium orthovanadate is 1:

2.

3. The method for preparing the Cu3(OH)2V2O7·2H2O material according to claim 1, characterized in that: The concentration of cupric acetate in the mixed solution is 0.02-0.2M, and the concentration of sodium orthovanadate is 0.04-0.4M.

4. The method for preparing the Cu3(OH)2V2O7·2H2O material according to claim 3, characterized in that: The concentration of cupric acetate in the mixed solution is 0.02M, and the concentration of sodium orthovanadate is 0.04M.

5. The method for preparing the Cu3(OH)2V2O7·2H2O material according to claim 1, characterized in that: The heating temperature is 90° C. and the reaction time is 12 h.

6. The method for preparing the Cu3(OH)2V2O7·2H2O material according to claim 1, characterized in that: The drying temperature is 50-70° C. and the drying time is 10-12 hours.

7. The Cu3(OH)2V2O7.2H2O material obtained by the preparation method of the Cu3(OH)2V2O7.2H2O material according to any one of claims 1 to 6 is used as an electrode material for aqueous ammonium ion batteries.

8. The use of the Cu3(OH)2V2O7·2H2O material according to claim 7, characterized in that: The Cu3(OH)2V2O7·2H2O material is applied to negative electrode materials of aqueous ammonium ion batteries.

9. The use of the Cu3(OH)2V2O7·2H2O material according to claim 7, characterized in that: The preparation steps of the aqueous ammonium ion battery electrode material include: mixing and grinding Cu3(OH)2V2O7·2H2O material, acetylene black and a binder, adding a conductive agent to form a uniform slurry, coating, and drying to obtain the aqueous ammonium ion battery electrode material.

10. The use of the Cu3(OH)2V2O7·2H2O material according to claim 9, characterized in that: The mass ratio of the Cu3(OH)2V2O7·2H2O material, acetylene black and binder is 7:2:1.

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