CN102201604A - Electric core of capacitance battery and manufacturing method of electric core - Google Patents

Abstract

The invention relates to a capacitor battery cell and a manufacturing method thereof. In the capacitance battery cell of the present invention, the battery active material and the capacitor active material are respectively coated on both sides of the current collector, and the battery active material and the capacitor active material are separated by the current collector, which reduces the interaction of different active materials of the same pole. In the manufacturing method of the present invention, the battery active material and the capacitor active material of the positive electrode and the negative electrode are separately slurried and then respectively attached to the current collector. The process adopted in the present invention does not need to develop new binders, solvent etc. In addition, the positive and negative battery active materials and the capacitor active materials are opposite to each other, which is beneficial to improve the utilization rate of the active materials, so that the advantages of the supercapacitor battery can be fully exerted. The capacitor battery cell of the invention has good performance, and the manufacturing method of the capacitor battery cell of the invention is simple to operate, convenient and practical, and has high efficiency.

Description

Capacitor battery cell and manufacturing method thereof

technical field

The invention relates to a capacitor battery cell and a manufacturing method thereof, and belongs to the transformation technology of the capacitor battery cell and the manufacturing method thereof.

Background technique

With the increasing shortage of petrochemical resources and the seriousness of environmental pollution, people pay more and more attention to the field of new energy. The huge demand in the fields of electric tools, electric vehicles, aerospace, national defense, electronic information and instrumentation makes the new generation of power-type green energy storage devices represented by supercapacitors and lithium-ion power batteries become the global high-tech industries. hot spot.

Lithium-ion secondary batteries are new energy storage devices developed since the 1990s. Lithium-ion batteries have higher energy density than nickel-metal hydride batteries, and at the same time have better high-current discharge performance. Although the LiCoO ₂ /C battery system first proposed by Sony Corporation in 1990 and put into industrialization has been widely used in small electrical appliances, it cannot be used as a power source for hybrid vehicles due to poor safety and high cost. In recent years, people have developed new cathode materials, such as lithium manganese oxide, lithium iron phosphate, etc. These materials have the characteristics of wide sources and low price, especially the long life and high safety of lithium iron phosphate have attracted great attention. It is expected to solve the fatal problem of lithium-ion battery as a hybrid power source to a certain extent. However, lithium manganate batteries have a series of problems due to poor cycle performance and poor high-temperature performance due to the dissolution of positive manganese; lithium-ion batteries made of lithium iron phosphate materials, although modified by doping to make their electrons The electrical conductivity has been significantly improved, but the current power density is still low, and the low-temperature performance is not ideal, and its low compaction density brings troubles to the battery manufacturing process, and there are still obstacles in practical aspects.

Supercapacitors are also a new type of green energy storage device that has developed rapidly in recent years. It has fast charge and discharge characteristics, and its power density is dozens or even hundreds of times that of ordinary batteries. In addition, the cycle life is long, and the number of charging and discharging cycles can reach 100,000 times, which is hundreds or even thousands of times that of ordinary batteries. Based on the unique performance of supercapacitors, some countries, including my country, have launched electric vehicle research and development projects using supercapacitors as power sources, and have been successfully applied to urban buses. However, supercapacitors also have a fatal weakness as a vehicle power supply, which is determined by its own working principle. The current supercapacitors are mainly based on two principles. One is the "electric double layer principle" represented by activated carbon materials. The generation of its capacitance is mainly based on the electric double layer capacitance generated by the charge separation on the electrode/electrolyte interface. The liquid is mainly KOH or H ₂ SO ₄ aqueous solution in the water system, and the propylene carbonate or acetonitrile solution of the quaternary ammonium salt in the non-aqueous system, and the ion conductivity is above 13 mS/cm; the other is based on metal The "Faraday quasi-capacitance principle" represented by oxides and conductive polymer materials, the capacitance is based on the underpotential deposition of electroactive ions on the surface of the material, or the adsorption quasi-capacitance generated by oxidation and reduction on the surface and inside of the material. The electrolyte is mainly an aqueous solution of KOH or H ₂ SO ₄ , and the current technology has not been applied in non-aqueous systems. But no matter what kind of supercapacitor it is, its working voltage is difficult to exceed 1.5 V in water system, and it is difficult to exceed 3.5 V in non-aqueous system. Redox reaction, according to the energy expression E=1/2CV ² of the capacity, its energy density is significantly lower than that of the secondary battery (about 1/10 of the lithium-ion battery).

Combining the high energy density of lithium-ion batteries with the high power density and long cycle life of supercapacitors has become the focus of research on power supply systems. There are two ways to combine lithium-ion batteries and supercapacitors. One is the "external combination" type (combining the two monomers into an energy storage component or system through power management). This "external combination" type actually It is the simple series and parallel connection of lithium-ion batteries and supercapacitors, which cannot fundamentally solve the respective defects of lithium-ion batteries and supercapacitors; body), the positive electrode active material in this "internal combination" monomer adopts a composite or mixed material of the positive electrode material of the lithium ion battery and the supercapacitor material, and the negative electrode active material adopts a composite or mixed material of the negative electrode material of the lithium ion battery and the supercapacitor material Hybrid materials, this "internal combination" energy storage device is called a supercapacitor battery. This supercapacitor battery composed of "internal combination" can avoid the respective defects of lithium-ion batteries and supercapacitors while retaining the high power and long cycle life of supercapacitors and the high energy density of lithium-ion batteries. In recent years, the energy storage devices of supercapacitor batteries have received more attention.

At present, the preparation of supercapacitor battery pole pieces generally adopts the simple mixing or composite slurry coating of lithium-ion battery electrode materials and supercapacitor materials on the current collector, and then assembled into super battery cells. However, there is a big difference between lithium-ion battery electrode materials and supercapacitor electrode materials. Material mixing or composite compounding pulping has problems such as difficulty in dispersing electrode materials in solvents, difficulty in controlling coating parameters, and poor bonding between electrode materials and current collectors. The positive and negative electrodes or materials of the batteries prepared by this method are difficult to give full play to the advantages of high power, ultra-long cycle life, and high energy density of supercapacitor batteries.

Contents of the invention

The purpose of the present invention is to consider the above problems and provide a method that reduces the difficulties in the preparation and coating of pole pieces due to the different physical and chemical properties of battery materials and capacitor materials, improves the utilization rate of active materials, and further improves The supercapacitor battery is a capacitor battery cell that exerts the comprehensive performance of the supercapacitor battery.

Another object of the present invention is to provide a method for manufacturing capacitor battery cells with simple operation and high efficiency.

The technical solution of the present invention is: the capacitor battery cell of the present invention includes at least one layer of cell unit composed of a positive electrode sheet, a negative electrode sheet and a diaphragm, wherein the diaphragm is arranged between the positive electrode sheet and the negative electrode sheet, and the positive electrode sheet includes The positive battery active material, the positive capacitor active material and the positive current collector, the positive battery active material and the positive capacitor active material are respectively coated on both sides of the positive current collector, and the negative sheet includes the negative battery active material, the negative capacitor active material and the negative current collector. The fluid, the active material of the negative electrode battery and the active material of the negative electrode capacitor are respectively coated on both sides of the negative electrode current collector. The battery cells are wound inward or stacked alternately and packed tightly. There is a diaphragm between them.

The above-mentioned cell unit composed of positive electrode sheet, negative electrode sheet and diaphragm is stacked in the following order: positive electrode battery active material, positive electrode current collector, positive electrode capacitor active material, diaphragm, negative electrode capacitor active material, negative electrode current collector, negative electrode battery active material , separator, or stacked in the following order: positive capacitor active material, positive electrode current collector, positive electrode battery active material, separator, negative electrode battery active material, negative electrode current collector, negative electrode capacitor active material, separator.

The manufacturing method of the electric capacity battery core of the present invention, it comprises the following steps:

1) At least one layer of cell units composed of positive electrode sheets, negative electrode sheets and separators are stacked neatly in the order of positive electrode sheets, separators, negative electrode sheets, and separators;

2) At least one layer of neatly stacked battery cells composed of positive electrode sheets, negative electrode sheets and separators is wound inward, and a separator is provided between adjacent winding layers;

3) The wound cell unit is compressed, packaged, and packaged to obtain a wound capacitor battery cell.

The making of above-mentioned positive plate comprises the following steps:

11) The active material of the positive electrode battery and the active material of the positive electrode capacitor are respectively prepared according to conventional pulping operations;

12) Apply the positive electrode battery active material and the positive electrode capacitor active material slurry prepared in step 11) to both sides of the positive electrode current collector;

13) Drying, slicing, weighing, and connecting tabs to the above-mentioned positive current collector coated with positive battery active material and positive capacitor active material (3) in sequence to make a positive electrode sheet;

The making of above-mentioned negative plate comprises the following steps:

21) The negative electrode battery active material and the negative electrode capacitor active material are respectively prepared according to conventional pulping operations;

22) Coating the negative electrode battery active material and negative electrode capacitor active material slurry prepared in step 21) on both sides of the negative electrode current collector;

23) The negative electrode current collector coated with the negative electrode battery active material and the negative electrode capacitor active material is sequentially dried, sliced, weighed, connected to tabs, and made into a negative electrode sheet.

The positive electrode battery active material in the positive electrode sheet is any one of LiCO ₂ , LiMn ₂ O ₄ , LiFePO ₄ , LiNiO ₂ , LiCo _1/3 Mn _1/3 Ni _1/3 O ₂ , LiVO ₄ , or the above-mentioned The metal dopant of the compound, the positive electrode capacitor active material is activated carbon, carbon nanotube, carbon aerogel, or any of these oxides of manganese oxide, cobalt oxide, nickel oxide, ruthenium oxide, vanadium oxide;

The negative electrode battery active material in the above-mentioned negative electrode sheet is any one of natural graphite, artificial graphite, mesophase carbon microspheres, carbon fibers, and the negative electrode capacitor active material is activated carbon, carbon nanotubes, carbon aerogel, graphene, or Any of oxides such as manganese oxide, cobalt oxide, nickel oxide, ruthenium oxide, and vanadium oxide.

The manufacturing method of the capacitor battery cell of the present invention comprises the following steps:

1) At least one layer of cell units composed of positive electrode sheets, negative electrode sheets and separators are stacked neatly in the order of positive electrode sheets, separators, negative electrode sheets, and separators, and between adjacent stacked cell unit layers. with diaphragm;

2) Coat the bottom and top surfaces of the stacked cell units with insulating glue;

3) Compress and package the stacked cell units to obtain a laminated capacitor battery cell.

During the stacking process of the above-mentioned pole pieces, the stacking order of all the positive pole pieces should be consistent, and the stacking order of all the negative pole pieces should be consistent; during the stacking process of the positive and negative pole pieces, the positive battery active material should be kept opposite to the negative battery active material, and the positive electrode capacitor The active material is opposite to the negative capacitor active material.

The making of above-mentioned positive plate comprises the following steps:

11) The active material of the positive electrode battery and the active material of the positive electrode capacitor are respectively prepared according to conventional pulping operations;

12) Apply the positive electrode battery active material and the positive electrode capacitor active material slurry prepared in step 11) to both sides of the positive electrode current collector;

13) Drying, slicing, weighing, and connecting tabs to the positive current collector coated with the active material of the positive battery and the active material of the positive capacitor in order to make a positive electrode sheet;

The making of above-mentioned negative plate comprises the following steps:

21) The negative electrode battery active material and the negative electrode capacitor active material are respectively prepared according to conventional pulping operations;

22) Coating the negative electrode battery active material and negative electrode capacitor active material slurry prepared in step 21) on both sides of the negative electrode current collector;

23) The negative electrode current collector coated with the negative electrode battery active material and the negative electrode capacitor active material is sequentially dried, sliced, weighed, connected to tabs, and made into a negative electrode sheet.

The positive electrode battery active material in the positive electrode sheet is any one of LiCO ₂ , LiMn ₂ O ₄ , LiFePO ₄ , LiNiO ₂ , LiCo _1/3 Mn _1/3 Ni _1/3 O ₂ , LiVO ₄ , or the above-mentioned The metal dopant of the compound, the positive electrode capacitor active material (3) is activated carbon, carbon nanotube, carbon aerogel, or any of these oxides of manganese oxide, cobalt oxide, nickel oxide, ruthenium oxide, vanadium oxide A sort of.

The negative electrode battery active material in the above-mentioned negative electrode sheet is any one of natural graphite, artificial graphite, mesophase carbon microspheres, carbon fibers, and the negative electrode capacitor active material is activated carbon, carbon nanotubes, carbon aerogel, graphene, or Any of oxides such as manganese oxide, cobalt oxide, nickel oxide, ruthenium oxide, and vanadium oxide.

The capacitor battery cell of the present invention adopts the structure that the battery active material and the capacitor active material are respectively coated on both sides of the current collector, and the battery active material and the capacitor active material are separated by the current collector, which reduces the difference between different active materials of the same pole. interaction. In addition, in the manufacturing process of the capacitor battery cell, the present invention simultaneously confronts the positive battery active material and the capacitor active material with the negative battery active material and the capacitor active material respectively, and the battery active material and the capacitor active material are separately pulped and then separately Attached to the current collector, this adopts the traditional and mature slurry coating process, without the need to develop new adhesives, solvents, etc. that are compatible with both battery active materials and capacitor active materials. In addition, the positive and negative battery active materials and the capacitor active materials are opposite to each other, which is beneficial to improve the utilization rate of the active materials, so that the advantages of the supercapacitor battery can be fully exerted. The capacitor cell of the invention has good performance, and the manufacturing method of the capacitor cell of the invention is simple to operate, convenient and practical.

Description of drawings

Fig. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of Embodiment 2 of the present invention.

Detailed ways

Example 1:

The schematic diagram of the structure of the present invention is shown in Figure 1. The capacitor battery cell of the present invention includes at least one cell unit composed of a positive electrode sheet, a negative electrode sheet and a diaphragm 7, wherein the diaphragm 7 is arranged between the positive electrode sheet and the negative electrode sheet. Among them, the positive electrode sheet includes positive electrode battery active material 1, positive electrode capacitor active material 3 and positive electrode current collector 5, the positive electrode battery active material 1 and positive electrode capacitor active material 3 are respectively coated on both sides of the positive electrode current collector 5, and the negative electrode sheet includes The negative electrode battery active material 2, the negative electrode capacitor active material 4 and the negative electrode current collector 6, the negative electrode battery active material 2 and the negative electrode capacitor active material 4 are respectively coated on both sides of the negative electrode current collector 6, and the cell unit is wound inward and passed through It is compressed and packaged, and a diaphragm 7 is arranged between the winding layers.

The above cell unit composed of positive electrode sheet, negative electrode sheet and diaphragm 7 is stacked in the following order: positive electrode battery active material 1, positive electrode current collector 5, positive electrode capacitor active material 3, diaphragm 7, negative electrode capacitor active material 4, negative electrode collector Fluid 6, negative battery active material 2, diaphragm 7, or stacked in the following order: positive capacitor active material 3, positive current collector 5, positive battery active material 1, diaphragm 7, negative battery active material 2, negative current collector 6, Negative electrode capacitor active material 4, diaphragm 7.

The manufacturing method of the electric capacity battery core of the present invention, it comprises the following steps:

1) At least one layer of cell units composed of positive electrode sheet, negative electrode sheet and separator 7 are stacked neatly in the order of positive electrode sheet, separator 7, negative electrode sheet, and separator 7;

2) At least one layer of neatly stacked cell units composed of positive electrode sheets, negative electrode sheets and separators 7 is wound inward, and a separator 7 is provided between adjacent winding layers;

3) The wound cell unit is compressed, packaged, and packaged to obtain a wound capacitor battery cell.

The making of above-mentioned positive plate comprises the following steps:

11) The positive electrode battery active material 1 and the positive electrode capacitor active material 3 are respectively prepared according to conventional pulping operations;

12) Apply the slurry of positive electrode battery active material 1 and positive electrode capacitor active material (3) prepared in step 11) on both sides of the positive electrode current collector 5;

13) The above-mentioned positive current collector 5 coated with the positive battery active material 1 and the positive capacitor active material 3 is sequentially dried, sliced, weighed, connected to tabs, and made into a positive sheet;

The making of above-mentioned negative plate comprises the following steps:

21) Negative electrode battery active material 2 and negative electrode capacitor active material 4 are respectively prepared according to conventional pulping operations;

22) Coating the negative electrode battery active material 2 and the negative electrode capacitor active material 4 slurry prepared in step 21) on both sides of the negative electrode current collector 6;

23) The negative electrode current collector 6 coated with the negative electrode battery active material 2 and the negative electrode capacitor active material 4 is sequentially dried, sliced, weighed, connected to tabs, and made into a negative electrode sheet.

The positive electrode battery active material 1 in the positive electrode sheet is LiCO ₂ , the positive electrode capacitor active material 3 is activated carbon; the negative electrode battery active material 2 in the above negative electrode sheet is natural graphite, and the negative electrode capacitor active material 4 is activated carbon.

Example 2:

The schematic diagram of the structure of the present invention is shown in Figure 2. The capacitor battery cell of the present invention includes at least one cell unit composed of a positive electrode sheet, a negative electrode sheet and a diaphragm 7, wherein the diaphragm 7 is arranged between the positive electrode sheet and the negative electrode sheet. Among them, the positive electrode sheet includes positive electrode battery active material 1, positive electrode capacitor active material 3 and positive electrode current collector 5, the positive electrode battery active material 1 and positive electrode capacitor active material 3 are respectively coated on both sides of the positive electrode current collector 5, and the negative electrode sheet includes The negative electrode battery active material 2, the negative electrode capacitor active material 4 and the negative electrode current collector 6, the negative electrode battery active material 2 and the negative electrode capacitor active material 4 are respectively coated on both sides of the negative electrode current collector 6, and the cell units are alternately stacked and pressed. In a tight package, a diaphragm 7 is provided between adjacent stacked layers.

The above cell unit composed of positive electrode sheet, negative electrode sheet and diaphragm 7 is stacked in the following order: positive electrode battery active material 1, positive electrode current collector 5, positive electrode capacitor active material 3, diaphragm 7, negative electrode capacitor active material 4, negative electrode collector Fluid 6, negative battery active material 2, diaphragm 7, or stacked in the following order: positive capacitor active material 3, positive current collector 5, positive battery active material 1, diaphragm 7, negative battery active material 2, negative current collector 6, Negative electrode capacitor active material 4, diaphragm 7.

The manufacturing method of the capacitor battery cell of the present invention comprises the following steps:

1) At least one layer of cell units composed of positive electrode sheet, negative electrode sheet and separator 7 are stacked neatly in the order of positive electrode sheet, separator 7, negative electrode sheet, and separator 7, and in the adjacent stacked cell unit layer There is a diaphragm 7 therebetween;

2) Coat the bottom and top surfaces of the stacked cell units with insulating glue;

3) Compress and package the stacked cell units to obtain a laminated capacitor battery cell.

During the stacking process of the above-mentioned pole pieces, the stacking order of all the positive pole pieces should be kept consistent, and the stacking order of all the negative pole pieces should be consistent; The positive capacitor active material 3 is opposed to the negative capacitor active material 4 .

The making of above-mentioned positive plate comprises the following steps:

11) The positive electrode battery active material 1 and the positive electrode capacitor active material 3 are respectively prepared according to conventional pulping operations;

12) Apply the slurry of the positive electrode battery active material 1 and the positive electrode capacitor active material 3 prepared in step 11) on both sides of the positive electrode current collector 5;

13) The above-mentioned positive current collector 5 coated with the positive battery active material 1 and the positive capacitor active material 3 is sequentially dried, sliced, weighed, connected to tabs, and made into a positive sheet;

The making of above-mentioned negative plate comprises the following steps:

21) Negative electrode battery active material 2 and negative electrode capacitor active material 4 are respectively prepared according to conventional pulping operations;

22) Coating the negative electrode battery active material 2 and the negative electrode capacitor active material 4 slurry prepared in step 21) on both sides of the negative electrode current collector 6;

23) The negative electrode current collector 6 coated with the negative electrode battery active material 2 and the negative electrode capacitor active material 4 is sequentially dried, sliced, weighed, connected to tabs, and made into a negative electrode sheet.

The positive electrode battery active material 1 in the positive electrode sheet is LiCO ₂ , the positive electrode capacitor active material 3 is activated carbon; the negative electrode battery active material 2 in the above negative electrode sheet is natural graphite, and the negative electrode capacitor active material 4 is activated carbon.

Example 3:

The structure and manufacturing method of the capacitor battery cell of the present invention are the same as in Example 1, except that the positive battery active material 1 and the negative battery active material 2 are respectively lithium iron phosphate and lithium titanate, the positive capacitor active material 3, the negative The capacitor active material 4 is made of activated carbon, and the positive current collector 5 and the negative current collector 6 are aluminum foils. The manufacturing method of the capacitor battery cell of the present invention is to coat the inwardly wound capacitor battery cell with insulating glue, and finally compress the cell, inject liquid, and package the cell to form a coiled supercapacitor cell. The average capacity of the 18650 supercapacitor battery made according to this scheme is 2.1Ah, and the capacity retention rate is 89% after 2000 times of charging and discharging at 10C.

Example 4:

The structure and manufacturing method of the capacitor battery cell of the present invention are the same as in Example 1, except that the active material 1 of the positive electrode battery and the active material 2 of the negative electrode battery are lithium cobaltate and graphite respectively, and the active material 3 of the positive electrode capacitor and the active material 2 of the negative electrode capacitor are The material 4 is activated carbon, and the positive current collector 5 and the negative current collector 6 are aluminum foil and copper foil respectively. The manufacturing method of the capacitor battery cell of the present invention is to coat the inwardly wound capacitor battery cell with insulating glue, and finally compress the cell, inject liquid, and package the cell to form a coiled supercapacitor cell. The average capacity of the 18650 type supercapacitor battery made according to this scheme is 2.3Ah, and the capacity retention rate is 86% after 2000 times of charging and discharging at 10C.

Example 5:

The structure and manufacturing method of the capacitor battery cell of the present invention are the same as in Example 1, except that the positive battery active material 1 and the negative battery active material 2 are respectively lithium manganate and graphite, the positive capacitor active material 3, and the negative capacitor active material The material 4 is activated carbon, and the positive current collector 5 and the negative current collector 6 are aluminum foil and copper foil respectively. The average capacity of the 18650 type supercapacitor battery made according to this scheme is 1.8Ah, and the capacity retention rate is 83% after 2000 times of charging and discharging at 10C.

Embodiment 6:

The structure and manufacturing method of the capacitor battery cell of the present invention are the same as in Example 2, except that the positive battery active material 1 and the negative battery active material 2 are respectively lithium iron phosphate and lithium titanate, the positive capacitor active material 3, the negative The capacitor active material 4 is made of activated carbon, and the positive current collector 5 and the negative current collector 6 are aluminum foil. Stack in the order of separator, positive electrode, separator, and negative electrode, and repeat the stacking 10 times. The uppermost and lowermost separators are coated with insulating glue, and then the cells are compressed and packaged to prepare a laminated supercapacitor battery. . The average capacity of the 063048 supercapacitor battery made by this scheme is 1.1 Ah, and the capacity retention rate is 87% after 10C charge and discharge 2000 times.

Embodiment 7:

The structure and manufacturing method of the capacitor battery cell of the present invention are the same as in Example 2, except that the active material 1 of the positive electrode battery and the active material 2 of the negative electrode battery are lithium cobaltate and graphite respectively, and the active material 3 of the positive electrode capacitor and the active material 2 of the negative electrode capacitor are Substance 4 is made of activated carbon, positive electrode current collector 5 and negative electrode current collector 6 are aluminum foil and copper foil respectively, and the manufacturing method is the same as that in Example 2. The average capacity of the 063048 supercapacitor battery made by this scheme is 1.2 Ah, and the capacity retention rate is 87% after 10C charge and discharge 2000 times.

Embodiment 8:

The structure and manufacturing method of the capacitor battery cell of the present invention are the same as in Example 2, except that the positive battery active material 1 and the negative battery active material 2 are lithium manganate and graphite respectively, and the rest are the same as in Example 2. The average capacity of the 063048 supercapacitor battery made by this scheme is 1.3 Ah, and the capacity retention rate is 87% after 10C charge and discharge 2000 times.

Claims (10)

1. A capacitor battery cell, characterized in that it includes at least one layer of cell unit consisting of a positive electrode sheet, a negative electrode sheet and a diaphragm (7), wherein the diaphragm (7) is arranged between the positive electrode sheet and the negative electrode sheet, and the positive electrode The sheet includes positive battery active material (1), positive capacitor active material (3) and positive current collector (5), the positive battery active material (1) and positive capacitor active material (3) are respectively coated on the positive current collector (5 ), the negative plate includes negative battery active material (2), negative capacitor active material (4) and negative current collector (6), negative battery active material (2) and negative capacitor active material (4) are coated separately On both sides of the negative electrode current collector (6), the cell units are wound inward or alternately stacked and packed tightly, and a separator (7) is provided between the wound layers or between adjacent stacked layers. 2. The capacitor battery cell according to claim 1, characterized in that the cell unit composed of positive electrode sheet, negative electrode sheet and diaphragm (7) is stacked in the following order: positive electrode battery active material (1), positive electrode Current collector (5), positive capacitor active material (3), separator (7), negative capacitor active material (4), negative current collector (6), negative battery active material (2), separator (7), or as follows Stacked in order: positive capacitor active material (3), positive current collector (5), positive battery active material (1), separator (7), negative battery active material (2), negative current collector (6), negative capacitor active material Substance (4), diaphragm (7). 3. A method for manufacturing a capacitor battery cell according to claim 1, comprising the following steps: 1) At least one layer of cell units composed of positive electrode sheet, negative electrode sheet and separator (7) are stacked neatly in the order of positive electrode sheet, separator (7), negative electrode sheet, and separator (7); 2) At least one layer of neatly stacked cell units composed of positive electrode sheets, negative electrode sheets and separators (7) is wound inward, and a separator (7) is provided between adjacent winding layers; 3) The wound cell unit is compressed, packaged, and packaged to obtain a wound capacitor battery cell. 4. The manufacturing method of the capacitor battery cell according to claim 3, characterized in that the making of the above-mentioned positive plate comprises the following steps: 11) The active material of the positive electrode battery (1) and the active material of the positive electrode capacitor (3) are respectively prepared according to conventional pulping operations; 12) Apply the slurry of positive electrode battery active material (1) and positive electrode capacitor active material (3) prepared in step 11) to both sides of the positive electrode current collector (5); 13) The positive current collector (5) coated with the positive battery active material (1) and the positive capacitor active material (3) is sequentially dried, sliced, weighed, connected to tabs, and made into a positive electrode sheet; The making of above-mentioned negative plate comprises the following steps: 21) Negative electrode battery active material (2) and negative electrode capacitor active material (4) are respectively prepared according to conventional pulping operations; 22) Coating the negative electrode battery active material (2) and negative electrode capacitor active material (4) slurry prepared in step 21) on both sides of the negative electrode current collector (6); 23) The negative electrode current collector (6) coated with the negative electrode battery active material (2) and the negative electrode capacitor active material (4) is sequentially dried, sliced, weighed, connected to tabs, and made into a negative electrode sheet. 5. The manufacturing method of a capacitor battery cell according to claim 3 or 4, characterized in that the positive battery active material (1) in the positive plate is LiCO ₂ , LiMn ₂ O ₄ , LiFePO ₄ , LiNiO ₂ , LiCo _1/3 Mn _1/3 Ni _1/3 O ₂ , any one of LiVO ₄ , or the metal dopant of the above compounds, the positive electrode capacitor active material (3) is activated carbon, carbon nanotubes, carbon gas Gel, graphene, or any of these oxides of manganese oxide, cobalt oxide, nickel oxide, ruthenium oxide, and vanadium oxide; The negative electrode battery active material (2) in the above negative electrode sheet is any one of natural graphite, artificial graphite, mesophase carbon microspheres, and carbon fibers, and the negative electrode capacitor active material (4) is activated carbon, carbon nanotubes, and carbon aerogels. , graphene, or any of these oxides of manganese oxide, cobalt oxide, nickel oxide, ruthenium oxide, and vanadium oxide. 6. A method for making a capacitor battery cell according to claim 1, characterized in that it comprises the following steps: 1) Stack at least one layer of cell units composed of positive electrode sheet, negative electrode sheet and separator (7) in sequence in order of positive electrode sheet, separator (7), negative electrode sheet, and separator (7). There is a diaphragm (7) between the layers of the discharged battery cells; 2) Coat the bottom and top surfaces of the stacked cell units with insulating glue; 3) Compress and package the stacked cell units to obtain a laminated capacitor battery cell. 7. The manufacturing method of a capacitor battery cell according to claim 5, characterized in that the stacking sequence of the cell unit layer should be kept consistent during the stacking process of the above-mentioned cell unit layer; The positive battery active material (1) is opposite to the negative battery active material (2), and the positive capacitor active material (3) is opposite to the negative capacitor active material (4). 8. The manufacturing method of the capacitor battery cell according to claim 6, characterized in that the making of the above-mentioned positive plate comprises the following steps: 11) The active material of the positive electrode battery (1) and the active material of the positive electrode capacitor (3) are respectively prepared according to conventional pulping operations; 12) Apply the slurry of positive electrode battery active material (1) and positive electrode capacitor active material (3) prepared in step 11) to both sides of the positive electrode current collector (5); 13) The positive current collector (5) coated with the positive battery active material (1) and the positive capacitor active material (3) is sequentially dried, sliced, weighed, connected to tabs, and made into a positive electrode sheet; The making of above-mentioned negative plate comprises the following steps: 21) Negative electrode battery active material (2) and negative electrode capacitor active material (4) are respectively prepared according to conventional pulping operations; 22) Coating the negative electrode battery active material (2) and negative electrode capacitor active material (4) slurry prepared in step 21) on both sides of the negative electrode current collector (6); 23) The negative electrode current collector (6) coated with the negative electrode battery active material (2) and the negative electrode capacitor active material (4) is sequentially dried, sliced, weighed, connected to tabs, and made into a negative electrode sheet. 9. The manufacturing method of a capacitor battery cell according to any one of claims 6 to 8, characterized in that the positive battery active material (1) in the positive electrode sheet is LiCO ₂ , LiMn ₂ O ₄ , LiFePO ₄ , LiNiO _2. Any one of LiCo _1/3 Mn _1/3 Ni _1/3 O ₂ , LiVO ₄ , or a metal dopant of the above-mentioned compounds, and the positive electrode capacitor active material (3) is activated carbon, carbon nanotube , carbon aerogel, or any of the oxides of manganese oxide, cobalt oxide, nickel oxide, ruthenium oxide, and vanadium oxide. 10. The manufacturing method of a capacitor battery cell according to claim 9, characterized in that the negative electrode battery active material (2) in the negative electrode sheet is any one of natural graphite, artificial graphite, mesocarbon microspheres, and carbon fibers One, the negative electrode capacitor active material (4) is activated carbon, carbon nanotubes, carbon aerogel, graphene, or any one of oxides such as manganese oxide, cobalt oxide, nickel oxide, ruthenium oxide, and vanadium oxide.

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