CN111900409A - Copper compound material used as lithium battery additive and preparation method and application thereof - Google Patents
Copper compound material used as lithium battery additive and preparation method and application thereof Download PDFInfo
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- H01M4/00—Electrodes
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
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- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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Abstract
The invention relates to a copper compound material used as a lithium battery additive, a preparation method and application thereof, wherein the copper compound material comprises CuxPyOzWherein X, Y, Z are all greater than 0 and satisfy the formula CuxPyOzIs electrically neutral; cuxPyOzThe method specifically comprises the following steps: cu2P2O7，Cu3(PO4)2，CuPO3Or CuP4O11One or more of; the copper compound material is one or more of spherical, ellipsoidal, cobblestone or irregular; the particle size is 0.1-100 μm; the copper compound material of the present invention is used as an additive for lithium batteries.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a copper compound material used as a lithium battery additive and a preparation method and application thereof.
Background
Storage batteries are widely used in today's society, and among them, lithium ion batteries are receiving attention from researchers due to their high energy density. In the existing mass-produced lithium batteries, the anode and cathode materials can meet the use requirements, but the defects of low conductivity, obvious reduction of the migration rate of lithium ions at crystal boundaries and the like exist, which can greatly influence the performance of the lithium ion batteries. Under the existing conditions, people mainly improve the performance of the lithium battery by researching and developing novel anode and cathode materials, but no breakthrough progress report is found
Currently, many researchers have been working on additives in positive and negative electrode materials. The researchers apply the materials such as the nanotube and the graphene as additives to the lithium battery anode material, and find that the conductivity of the lithium battery anode material can be improved to a certain extent. The researchers also add silicon compounds into the negative electrode material in a grinding mode after sintering, so that the specific capacity of the negative electrode material is successfully improved. However, the introduction of additives with complex composition into the positive and negative electrode materials may have adverse effects on the cost and electrochemical reaction.
Therefore, it is very practical to develop a compound additive which has simple preparation method and can be used for parts such as anode and cathode materials, diaphragms and the like.
Disclosure of Invention
The embodiment of the invention provides a copper compound material used as a lithium battery additive, and a preparation method and application thereofxPyOzThe material is used as an additive for anode slurry, cathode slurry and diaphragm coating material, and can obviously improve the specific capacity, safety and other performances of the lithium battery.
In a first aspect, embodiments of the present invention provide a copper compound material for use as an additive for lithium batteries, the copper compound material including CuxPyOzWherein X, Y, Z are all greater than 0 and satisfy the formula CuxPyOzIs electrically neutral;
the CuxPyOzThe method specifically comprises the following steps: cu2P2O7，Cu3(PO4)2，CuPO3Or CuP4O11One or more of;
the copper compound material is one or more of spherical, ellipsoidal, cobblestone or irregular; the particle size is 0.1-100 μm;
the copper compound material is used as an additive for lithium batteries.
Preferably, the copper compound material further includes: coated with CuxPyOzAn outer coating material; the cladding material comprises: one or more of manganese oxide, cobalt oxide, nickel oxide, vanadium oxide, titanium oxide and zinc oxide;
the cladding material covers the CuxPyOzSurface, and accounts for 60% -100% of the total surface area; the clad material and CuxPyOzIn a mass ratio of 0.01 to 0.5]：1。
In a second aspect, an embodiment of the present invention provides a method for preparing a copper compound material according to the first aspect, where the method for preparing the copper compound material includes:
adding a copper source compound and a phosphate compound into a ball mill according to a required mass ratio, carrying out ball milling by taking ethanol as a medium, and drying after ball milling;
heating the dried powder to 200-400 ℃ at the speed of 3-10 ℃/h under the protective atmosphere, preserving the heat for 1-3 hours, then continuously heating to 900-1500 ℃, preserving the heat for 15-30 hours, and cooling to room temperature;
washing the product obtained after cooling with deionized water, putting the product into a vacuum drying furnace, drying the product for 12 hours at the temperature of 120-160 ℃, and finally grinding the dried product into powder to obtain the copper compound material;
wherein the copper source compound specifically comprises one or more of copper oxide, copper hydroxide, copper carbonate and organic copper salt; the phosphate compound is one or more of calcium phosphate, monocalcium phosphate, trisodium phosphate and disodium hydrogen phosphate.
Preferably, the step of finally grinding the dried product into powder to obtain the copper compound material specifically comprises the following steps:
grinding the dried product into powder, adding the powder into a solvent, and then adding a coating material oxide to obtain a mixed solution; carrying out spray drying on the mixed solution to obtain a copper compound material;
wherein the content of the first and second substances,the copper compound material is Cu coated with a coating materialxPyOz；
The cladding material oxide includes: one or more of manganese oxide, cobalt oxide, nickel oxide, vanadium oxide, titanium oxide and zinc oxide; the solvent comprises at least one of isopropanol, ethanol, diethyl ether, propylene oxide, acetone, methyl butanone, methyl acetate, ethyl acetate and deionized water.
Further preferably, the temperature of the spray drying is 120-160 ℃, and the drying time is 3-10 hours.
Preferably, the protective atmosphere is one or more of air, argon and nitrogen atmosphere.
In a third aspect, embodiments of the present invention provide a use of the copper compound material according to the first aspect as an additive for a lithium battery, in a slurry for a positive electrode material, a slurry for a negative electrode material, or a coating material for a separator.
In a fourth aspect, an embodiment of the present invention provides a lithium battery, including the copper compound material according to the first aspect.
The embodiment of the invention provides a copper compound material used as a lithium battery additive, and a preparation method and application thereofxPyOzThe material is used as an additive for anode slurry, cathode slurry and diaphragm coating material, and can obviously improve the specific capacity, safety and other performances of the lithium battery.
Drawings
The technical solutions of the embodiments of the present invention are further described in detail with reference to the accompanying drawings and embodiments.
FIG. 1 is a first cycle charge and discharge diagram of batteries of example 1 and comparative example 1 of the present invention;
FIG. 2 is a comparison of DC internal resistance performance test curves of the batteries of examples 3, 6 and 9 of the present invention and comparative example 1.
Detailed Description
The invention is further illustrated by the following figures and specific examples, but it should be understood that these examples are for the purpose of illustration only and are not to be construed as in any way limiting the present invention, i.e., as in no way limiting its scope.
The invention provides a copper compound material used as an additive of a lithium battery, and the copper compound material comprises CuxPyOzWherein X, Y, Z are all greater than 0 and satisfy the formula CuxPyOzIs electrically neutral; optionally, the material may further comprise cladding in CuxPyOzAn outer coating material; the coating material specifically comprises: one or more of manganese oxide, cobalt oxide, nickel oxide, vanadium oxide, titanium oxide and zinc oxide.
Cladding material covering the CuxPyOzSurface, and accounts for 60% -100% of the total surface area; clad material and CuxPyOzIn a mass ratio of 0.01 to 0.5]：1。
The copper compound material provided by the invention is in one or more of spherical shape, ellipsoid shape, cobblestone shape or irregular shape, and the particle size is 0.1-100 μm.
The material is used as an additive of a lithium battery and is used in positive electrode material slurry, negative electrode material slurry or a diaphragm coating material.
The copper compound material of the invention can be prepared by the following method:
adding a copper source compound and a phosphate compound into a ball mill according to a required mass ratio, carrying out ball milling by taking ethanol as a medium, and drying after ball milling; heating the dried powder to 200-400 ℃ at the speed of 3-10 ℃/h under the protective atmosphere, preserving the heat for 1-3 hours, then continuously heating to 900-1500 ℃, preserving the heat for 15-30 hours, and cooling to room temperature; washing the cooled product with deionized water, placing the product into a vacuum drying furnace, drying the product for 12 hours at the temperature of 120-160 ℃, and finally grinding the dried product into powder to obtain the copper compound material CuxPyOz。
Wherein the protective atmosphere is one or more of air, argon and nitrogen. The copper source compound specifically comprises one or more of copper oxide, copper hydroxide, copper carbonate and organic copper salt; the phosphate compound is one or more of calcium phosphate, calcium dihydrogen phosphate, trisodium phosphate and disodium hydrogen phosphate.
For the material also include cladding in CuxPyOzCase of the other coating material: grinding the dried product into powder, adding the powder into a solvent, and then adding a coating material oxide to obtain a mixed solution; and (3) carrying out spray drying on the mixed solution, wherein the temperature of the spray drying is 120-160 ℃, and the drying time is 3-10 hours, so as to obtain the copper compound material containing the coating material.
In this embodiment, the coating material oxide includes: one or more of manganese oxide, cobalt oxide, nickel oxide, vanadium oxide, titanium oxide and zinc oxide; the solvent comprises at least one of isopropanol, ethanol, diethyl ether, propylene oxide, acetone, methyl butanone, methyl acetate, ethyl acetate and deionized water.
The copper compound material is used as the lithium battery additive, and on one hand, Cu in the copper compound materialxPyOzThe core is the composite coating material oxide, the shell is the composite coating material oxide, the core-shell structure is formed, the stability of the material is greatly improved, on the other hand, the crystallinity of the crystal is improved by sintering, the ion extraction is facilitated, and the first-cycle efficiency, the first-cycle discharge specific capacity and the cycle performance of the secondary battery can be well improved.
In order to better understand the technical scheme provided by the present invention, the following description will respectively illustrate the specific processes for preparing the copper compound material by applying the method provided by the above embodiments of the present invention, and the method and battery characteristics for applying the same to the secondary battery, in a plurality of specific examples.
Further, for better comparison to illustrate the technical advantages of the copper compound material proposed by the present invention, comparative example 1 is also provided for comparison with the following examples 1 to 9.
Comparative example 1
The ternary positive electrode material LiNi0.5Co0.2Mn0.3O2(NCM523), acetylene black and polytetrafluoroethylene are uniformly mixed according to the mass ratio of 8:1:1 to prepare a positive pole piece, graphite is used as a negative pole, a Polyethylene (PE) film coated with Lithium Aluminum Titanium Phosphate (LATP) is used as a diaphragm, and 1MLiPF is used6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled in a glove box as a CR2032 button cell for comparative use.
Example 1
The present embodiment provides a copper compound material including Cu as a core2P2O7And coating materials of vanadium oxide, vanadium oxide and Cu covering the surface of the core2P2O7The mass ratio of (A) to (B) is 0.08: 1. The preparation method comprises the following steps:
adding copper oxide and calcium phosphate into ethanol, ball-milling, drying, heating to 200 ℃ at the speed of 5 ℃/h under argon, preserving heat for 1 hour, heating to 1000 ℃, preserving heat for 15 hours, cleaning the obtained product with deionized water, and drying in a vacuum drying furnace at the temperature of 120 ℃ for 12 hours. Grinding the product into powder to obtain the material Cu2P2O7；
Mixing the obtained Cu2P2O7Dispersing in deionized water to obtain a solution A, dispersing vanadium oxide in the solution A to obtain a solution B, and finally performing spray drying on the solution B to obtain the copper compound material. The copper compound material is Cu coated with vanadium oxide2P2O7。
Uniformly mixing a ternary positive electrode material NCM523, the obtained copper compound material, acetylene black and polyvinylidene fluoride (PVDF) according to the mass ratio of 8:0.5:1:0.5, coating the mixture on an aluminum foil to serve as a battery positive electrode, taking graphite as a negative electrode, taking a Polyethylene (PE) film coated with titanium aluminum lithium phosphate (LATP) as a diaphragm and 1MLiPF6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled into a CR2032 type button cell in a glove box.
FIG. 1 is a first cycle charge and discharge diagram of batteries of example 1 and comparative example 1 of the present invention; under the voltage window of 1.0-3.0V and the multiplying power of 0.1C, the specific capacity of the first cyclic discharge is measured to be 171.4mAh/g, the capacity retention rate after 50 cycles is more than 90.87%, and the internal resistance is measured to be 52.7 omega under 100% of electricity.
Example 2
Uniformly mixing the copper compound material obtained in example 1 and LATP according to the mass ratio of 1:8 to prepare slurry, coating the slurry on a PE film to be used as a diaphragm, uniformly mixing a ternary positive electrode material NCM523, acetylene black and polyvinylidene fluoride (PVDF) according to the mass ratio of 8:1:1 to prepare a positive electrode, taking graphite as a negative electrode and 1MLiPF6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled into a CR2032 type button cell in a glove box.
Under the voltage window of 1.0-3.0V and the multiplying power of 0.1C, the first cyclic charge specific capacity is measured to be 158.5mAh/g, the capacity retention rate after 50 cycles is 89.74%, and the internal resistance is measured to be 31.5 omega under 100% of electricity.
Example 3
Uniformly mixing the copper compound material obtained in example 1 and graphite according to the mass ratio of 0.5:9.5, coating the mixture on a copper foil to be used as a battery cathode, uniformly mixing a ternary cathode material NCM523, acetylene black and polyvinylidene fluoride (PVDF) according to the mass ratio of 8:1:1 to prepare a cathode, taking a Polyethylene (PE) film coated with titanium aluminum lithium phosphate (LATP) as a diaphragm, and taking 1MLiPF6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled into a CR2032 type button cell in a glove box.
Under the voltage window of 1.0-3.0V and the multiplying power of 0.1C, the first cyclic charge specific capacity is measured to be 160mAh/g, the capacity retention rate after 50 cycles is 91.79%, and the internal resistance is measured to be 48.2 omega under the condition of 100% electric quantity.
Example 4
The present embodiment provides a copper compound material including Cu as a core2P2O7And coating materials of vanadium oxide, vanadium oxide and Cu covering the surface of the core2P2O7The mass ratio of (A) to (B) is 0.05: 1. The preparation method comprises the following steps:
adding copper carbonate and monocalcium phosphate into ethanol, ball-milling, drying, heating to 300 ℃ at the speed of 10 ℃/h under argon, preserving heat for 2 hours, heating to 1200 ℃, preserving heat for 20 hours, washing the obtained product with deionized water, and drying in a vacuum drying furnace at the temperature of 150 ℃ for 12 hours. Grinding the product into powder to obtain the material Cu2P2O7；
Mixing the obtained Cu2P2O7Dispersing in ethanol to obtain a solution A, dispersing vanadium oxide in the solution A to obtain a solution B, and finally performing spray drying on the solution B to obtain the copper compound material. The copper compound material is Cu coated with vanadium oxide2P2O7。
Uniformly mixing a ternary positive electrode material NCM523, the obtained copper compound material, acetylene black and polyvinylidene fluoride (PVDF) according to the mass ratio of 8:0.5:1:0.5, coating the mixture on an aluminum foil to serve as a battery positive electrode, taking graphite as a negative electrode, a Polyethylene (PE) film coated with titanium aluminum lithium phosphate (LATP) as a diaphragm, and taking 1M LiPF6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled into a CR2032 type button cell in a glove box.
FIG. 1 is a first cycle charge and discharge diagram of batteries of example 1 and comparative example 1 of the present invention; under the voltage window of 1.0-3.0V and the multiplying power of 0.1C, the specific capacity of the first cycle discharge is measured to be 168.2mAh/g, the capacity retention rate after 50 cycles is 90.06%, and the internal resistance is measured to be 53.1 omega under 100% of electricity.
Example 5
The copper compound material obtained in example 4 and graphite were uniformly mixed in a mass ratio of 0.5:9.5, coated on a copper foil as a battery negative electrode, a ternary positive electrode material NCM523, acetylene black and polytetrafluoroethylene were uniformly mixed in a mass ratio of 8:1:1 to prepare a positive electrode, a Polyethylene (PE) film coated with Lithium Aluminum Titanium Phosphate (LATP) was used as a separator, and 1MLiPF was used6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled into a CR2032 type button cell in a glove box.
Under the voltage window of 1.0-3.0V and the multiplying power of 0.1C, the first cyclic charge specific capacity is measured to be 160.1mAh/g, the capacity retention rate after 50 cycles is 92.09%, and the internal resistance is measured to be 48.2 omega under the condition of 100% electric quantity.
Example 6
Uniformly mixing the copper compound material obtained in the example 4 and LATP according to the mass ratio of 1:8 to prepare slurry, coating the slurry on a PE film to be used as a diaphragm, uniformly mixing a ternary positive electrode material NCM523, acetylene black and polyvinylidene fluoride (PVDF) according to the mass ratio of 8:1:1 to prepare a positive electrode, taking graphite as a negative electrode and 1MLiPF6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled into a CR2032 type button cell in a glove box.
Under the voltage window of 1.0-3.0V and the multiplying power of 0.1C, the first cyclic charge specific capacity is measured to be 158.5mAh/g, the capacity retention rate after 50 cycles is 89.12 percent, and the internal resistance is measured to be 33.4 omega under 100 percent of electric quantity.
Example 7
The present embodiment provides a copper compound material including Cu as a core3(PO4)2And the cladding material titanium oxide, titanium oxide and Cu covering the surface of the inner core3(PO4)2The mass ratio of (A) to (B) is 0.03: 1. The preparation method comprises the following steps:
adding copper carbonate and monocalcium phosphate into ethanol, ball-milling, drying, heating to 250 ℃ at the speed of 5 ℃/h under argon, preserving heat for 2 hours, subsequently heating to 1500 ℃, preserving heat for 25 hours, washing the obtained product with deionized water, and drying in a vacuum drying furnace at the temperature of 160 ℃ for 10 hours. Grinding the product into powder to obtain the material Cu2P2O7；
Mixing the obtained Cu3(PO4)2Dispersing in acetone to obtain a solution A, dispersing titanium oxide in the solution A to obtain a solution B, and finally performing spray drying on the solution B to obtain the copper compound material. The copper compound material is Cu coated with titanium oxide3(PO4)2。
The ternary cathode material NCM523, the obtained copper compound material, acetylene black and polyvinylidene fluorideUniformly mixing ethylene (PVDF) according to the mass ratio of 8:0.5:1:0.5, coating the mixture on an aluminum foil to serve as a battery anode, taking graphite as a cathode, taking a Polyethylene (PE) film coated with titanium aluminum lithium phosphate (LATP) as a diaphragm, and taking 1MLiPF6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled into a CR2032 type button cell in a glove box.
FIG. 1 is a first cycle charge and discharge diagram of batteries of example 1 and comparative example 1 of the present invention; under the voltage window of 1.0-3.0V and the multiplying power of 0.1C, the specific capacity of the first cyclic discharge is 169.9mAh/g, the capacity retention rate after 50 cycles is 89.22%, and the internal resistance is 54.9 omega when the 100% electricity is measured.
Example 8
The copper compound material obtained in example 7 and graphite were uniformly mixed in a mass ratio of 0.5:9.5, and coated on a copper foil as a battery negative electrode, a ternary positive electrode material NCM523, acetylene black and polytetrafluoroethylene were uniformly mixed in a mass ratio of 8:1:1 to prepare a positive electrode, a Polyethylene (PE) film coated with Lithium Aluminum Titanium Phosphate (LATP) was used as a separator, and 1MLiPF was used6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled into a CR2032 type button cell in a glove box.
Under the voltage window of 1.0-3.0V and the multiplying power of 0.1C, the first cyclic charge specific capacity is measured to be 159.5mAh/g, the capacity retention rate after 50 cycles is 91.39%, and the internal resistance is measured to be 49.5 omega under 100% of electricity.
Example 9
The copper compound material obtained in example 7 and LATP were uniformly mixed in a mass ratio of 1:8 to prepare a slurry, the slurry was coated on a PE film as a separator, a ternary positive electrode material NCM523, acetylene black and polyvinylidene fluoride (PVDF) were uniformly mixed in a mass ratio of 8:1:1 to prepare a positive electrode, graphite was used as a negative electrode, and 1M LiPF was used6@ ethylene carbonate/dimethyl carbonate (EC/DMC, 1: 1v/v) containing 3 wt% fluoroethylene carbonate (FEC) as an electrolyte was assembled into a CR2032 type button cell in a glove box.
Under the voltage window of 1.0-3.0V and the multiplying power of 0.1C, the first cyclic charge specific capacity is measured to be 160.6mAh/g, the capacity retention rate after 50 cycles is 89.27%, and the internal resistance is measured to be 35.4 omega under the condition of 100% electric quantity.
The above are examples of copper compound materials to be obtained by different preparation methods, and the test data of each example can be specifically also referred to the following table 1.
| Specific first cycle discharge capacity | First effect | Capacity retention after 50 weeks | Internal resistance (100%) | |
| Comparative example 1 | 159.6 | 88.61％ | 89.14％ | 52.4 |
| Example 1 | 171.4 | 87.43％ | 90.87％ | 52.7 |
| Example 2 | 160.0 | 92.40％ | 91.79％ | 48.2 |
| Example 3 | 158.5 | 89.23％ | 89.74％ | 31.5 |
| Example 4 | 168.21 | 88.44％ | 90.06％ | 53.1 |
| Example 5 | 160.1 | 92.14％ | 92.09％ | 48.2 |
| Example 6 | 158.5 | 88.14％ | 89.12％ | 33.4 |
| Example 7 | 169.9 | 88.88％ | 89.22％ | 54.9 |
| Example 8 | 159.5 | 91.39％ | 92.77％ | 49.5 |
| Example 9 | 160.6 | 89.85％ | 89.27％ | 35.4 |
TABLE 1
Compared with the comparative example 1, the addition of the copper compound additive into the positive electrode material can obviously improve the discharge capacity of the battery; the first-cycle efficiency of the battery can be improved by adding the copper compound additive into the negative electrode material;
fig. 2 is a comparison of dc internal resistance performance test curves of the batteries of examples 3, 6 and 9 of the present invention and comparative example 1, and it can be seen from the comparison that the internal resistance of the battery can be reduced by adding the copper compound additive to the separator coating material.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A copper compound material for use as an additive in a lithium battery, wherein the copper compound material comprises CuxPyOzWherein X, Y, Z are all greater than 0 and satisfy the formula CuxPyOzIs electrically neutral;
the CuxPyOzThe method specifically comprises the following steps: cu2P2O7，Cu3(PO4)2，CuPO3Or CuP4O11One or more of;
the copper compound material is one or more of spherical, ellipsoidal, cobblestone or irregular; the particle size is 0.1-100 μm;
the copper compound material is used as an additive for lithium batteries.
2. The copper compound material of claim 1, further comprising: coated with CuxPyOzAn outer coating material; the cladding material comprises: one or more of manganese oxide, cobalt oxide, nickel oxide, vanadium oxide, titanium oxide and zinc oxide;
the cladding material covers the CuxPyOzSurface, and accounts for 60% -100% of the total surface area; the clad material and CuxPyOzIn a mass ratio of 0.01 to 0.5]：1。
3. A method for producing the copper compound material according to claim 1, characterized by comprising:
adding a copper source compound and a phosphate compound into a ball mill according to a required mass ratio, carrying out ball milling by taking ethanol as a medium, and drying after ball milling;
heating the dried powder to 200-400 ℃ at the speed of 3-10 ℃/h under the protective atmosphere, preserving the heat for 1-3 hours, then continuously heating to 900-1500 ℃, preserving the heat for 15-30 hours, and cooling to room temperature;
washing the product obtained after cooling with deionized water, putting the product into a vacuum drying furnace, drying the product for 12 hours at the temperature of 120-160 ℃, and finally grinding the dried product into powder to obtain the copper compound material;
wherein the copper source compound specifically comprises one or more of copper oxide, copper hydroxide, copper carbonate and organic copper salt; the phosphate compound is one or more of calcium phosphate, monocalcium phosphate, trisodium phosphate and disodium hydrogen phosphate.
4. The method of claim 3, wherein the step of grinding the dried product into powder to obtain the copper compound material specifically comprises:
grinding the dried product into powder, adding the powder into a solvent, and then adding a coating material oxide to obtain a mixed solution; carrying out spray drying on the mixed solution to obtain a copper compound material;
wherein the copper compound material is Cu coated with a coating materialxPyOz；
The cladding material oxide includes: one or more of manganese oxide, cobalt oxide, nickel oxide, vanadium oxide, titanium oxide and zinc oxide; the solvent comprises at least one of isopropanol, ethanol, diethyl ether, propylene oxide, acetone, methyl butanone, methyl acetate, ethyl acetate and deionized water.
5. The method of claim 3, wherein the spray drying is at a temperature of 120 ℃ to 160 ℃ for a time of 3 hours to 10 hours.
6. The method of claim 3, wherein the protective atmosphere is one or more of air, argon, and nitrogen.
7. Use of the copper compound material according to claim 1 or 2 as an additive for a lithium battery in a slurry for a positive electrode material, a slurry for a negative electrode material, or a separator coating material.
8. A lithium battery comprising the copper compound material according to claim 1 or 2.
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