CN115632174A - Lithium-sodium mixed ion battery - Google Patents

Lithium-sodium mixed ion battery Download PDF

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Publication number
CN115632174A
CN115632174A CN202211202283.9A CN202211202283A CN115632174A CN 115632174 A CN115632174 A CN 115632174A CN 202211202283 A CN202211202283 A CN 202211202283A CN 115632174 A CN115632174 A CN 115632174A
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lithium
sodium
ion battery
negative electrode
battery
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王真
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Liaoning Dengsai New Energy Co ltd
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Liaoning Dengsai New Energy Co ltd
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Priority to CN202211202283.9A priority Critical patent/CN115632174A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The embodiment of the invention discloses a lithium-sodium mixed type ion battery. A lithium-sodium hybrid ion battery comprising: the anode component comprises a lithium ion battery anode material and a sodium ion battery anode material; the negative electrode material in the negative electrode component includes hard carbon. According to the invention, the sodium ion battery technology and the lithium ion battery technology are fused together, so that the advantages of high energy density and high voltage platform of the lithium ion battery and the advantages of good low-temperature performance, high safety, low cost and abundant resources of the sodium ion battery are brought into play, and the advantages of strong points and weak points are made up, so that the sodium ion battery provided by the invention is more in line with the market demand of the battery, and is beneficial to the popularization of new energy vehicles and chemical energy storage battery markets.

Description

Lithium-sodium mixed ion battery
Technical Field
The embodiment of the invention relates to the technical field of secondary batteries, in particular to a lithium-sodium mixed type ion battery.
Background
In recent years, with the increasing exhaustion of fossil energy and the increasing severity of environmental problems such as global warming, research on new energy has been gaining widespread importance in society. With the technical progress of the battery industry, the demand of the battery industry is also continuously increased; lithium ion batteries are widely popularized and used in electric automobiles, and lithium ion batteries are widely used in energy storage equipment. However, due to the scarcity of the related active material resources of the lithium ion battery, the battery cost is always high, and meanwhile, the battery faces severe problems such as related resource exhaustion and the like. With the development of lithium resources and noble metals such as nickel, cobalt and the like, the production cost of the lithium ion battery is continuously increased, and the popularization and application of new energy vehicles and battery energy storage markets are severely restricted. The problem of seeking a battery technology solution with abundant resources, low cost, environmental protection and safety is still the first solution.
The working principle of the sodium ion battery is basically similar to that of the lithium ion battery, sodium is one of the metal elements which are stored in the earth crust, and the materials used by the sodium ion battery can be cheap and easily obtained, so the sodium ion battery is one of the technologies with the most development potential. However, the specific energy of the sodium ion battery is lower than that of the lithium ion battery, so that the improvement of the specific energy of the sodium ion battery and the reduction of the cost of the lithium ion battery are technical problems which need to be solved at present, and are also problems which need to be solved firstly in order to solve the problems of popularization and application of new energy vehicles and battery energy storage.
Application number CN202210260672.0 discloses a preparation method of a high-performance lithium/sodium ion battery and the battery, 202210260672.0 discloses a preparation method of a high-performance lithium/sodium ion battery and the battery, and the positive electrode of the battery further comprises a positive active substance, a positive conductive agent and a positive binder. Wherein the positive active substance accounts for 90-99 wt% of the total amount of the electrode, and preferably 95-98 wt%. The positive active material comprises lithium cobaltate, lithium manganate, lithium iron phosphate, lithium nickel cobalt manganese oxide, a lithium-rich manganese material, a transition oxide, prussian blue and polyanions. The negative active material comprises one or more of artificial graphite, natural graphite, silicon monoxide and silicon-carbon composite. In the above technical solution, the inventor intends to prepare a battery of a new material by mixing sodium ions with a lithium ion battery, and integrates the advantages of the lithium ion battery such as long service life, high energy density, high rate, high gram capacity, and high voltage plateau, and the advantages of the sodium ion battery such as excellent low-temperature performance, long service life, low cost, and abundant resources, thereby solving the problem of low-temperature performance of the lithium ion battery.
However, the active ingredient proportion of the scheme for storing sodium ions is extremely low, and the negative active material adopts one or more of artificial graphite, natural graphite, silicon oxide and silicon-carbon composite. When the artificial graphite and the natural graphite are used as sodium storage cathodes, the capacity is only 35mAh/g; silicon, silicon monoxide and silicon □ carbon composite have high capacity when used for storing lithium ions in a battery negative electrode, but are difficult to form alloying reaction if used for storing sodium ions, so that the reversible capacity is also low. The scheme has no practical application significance for improving the low-temperature performance of the battery and reducing the cost of the battery.
Disclosure of Invention
Therefore, the embodiment of the invention provides a lithium-sodium mixed type ion battery.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a lithium-sodium hybrid ion battery comprising: a positive electrode component, a negative electrode component,
the positive electrode component comprises a lithium ion battery positive electrode material and a sodium ion battery positive electrode material;
the negative electrode material in the negative electrode component comprises hard carbon.
In some of the preferred embodiments of the present invention,
the lithium ion battery positive electrode material comprises one or a combination of more of a lithium iron phosphate material, lithium manganate, lithium cobaltate, lithium iron manganese phosphate, lithium-rich manganese and a ternary lithium positive electrode material;
the positive electrode material of the sodium-ion battery comprises one or more of a P2 or O3 phase sodium metal oxide, a sodium phosphate or pyrophosphate compound and a sodium Prussian albino compound.
In some of the preferred embodiments of the present invention,
the crystallite layer distance d of the hard carbon material 002 0.37-0.47 nm, chu Nake with 200 mAh-600 mAh/g capacity and 0.5-3 m specific surface area 2 (iv)/g, the particle diameter Dv50 is 2 to 10 μm.
In some preferred embodiments, the negative electrode material further comprises a combination of one or more selected from the group consisting of artificial graphite, natural graphite, mesocarbon microbeads, silica-carbon composite, and nano-silicon-carbon composite.
In some preferred embodiments, the positive electrode composition further comprises a positive electrode conductive agent and a positive electrode binder.
In some preferred embodiments, the mass ratio of the lithium ion battery positive electrode material, the sodium ion battery positive electrode material, the positive electrode conductive agent and the positive electrode binder is 5-99: 5 to 99:0.5 to 5:0.5 to 5;
the positive electrode conductive agent comprises one or a combination of more of carbon black, carbon nano tubes, carbon fibers, graphene and microcrystalline graphite;
the positive electrode binder comprises one or a combination of PVDF and PAN.
In some preferred embodiments, the negative electrode composition further comprises a negative electrode conductive agent, a negative electrode binder, a negative electrode thickener.
In some preferred embodiments, the mass ratio of the negative electrode material, the negative electrode conductive agent, the negative electrode binder and the negative electrode thickener is 90-98: 1 to 5:1 to 5:0.5 to 5;
the negative electrode conductive agent comprises one or more of carbon black, carbon nano tubes, carbon fibers, graphene and microcrystalline graphite;
the negative electrode binder comprises one or more of sodium polyacrylate, styrene butadiene rubber, sodium alginate and polyacrylate copolymer;
the negative electrode thickener comprises one or more of CMC, hydroxypropyl methylcellulose and carboxyethyl methylcellulose.
In some preferred embodiments, the lithium-sodium hybrid ion battery further comprises an electrolyte, the electrolyte is a mixture of a commercial lithium ion electrolyte and a commercial sodium ion electrolyte, and the mass ratio of the lithium ion electrolyte to the sodium ion electrolyte is 0.1-0.9: 0.9 to 0.1.
In some preferred embodiments, the lithium-sodium hybrid ion battery further comprises a separator, which is a commercial lithium ion battery separator, a composite separator comprising one or more of polyethylene, polypropylene, a ceramic separator surface-coated with alumina, or a separator surface-coated with PVDF.
The embodiment of the invention has the following advantages:
1. by fusing the sodium ion battery technology and the lithium ion battery technology together, the advantages of high energy density and high voltage platform of the lithium ion battery and the advantages of good low-temperature performance, high safety, low cost and abundant resources of the sodium ion battery are brought into play, and the advantages of strong points and weak points are made up, so that the sodium ion battery can meet the market demand of the battery better, and is beneficial to popularization of new energy vehicles and chemical energy storage battery markets.
2. The specific energy of the invention is 150-240 Wh/kg, which is far higher than the specific energy of the current sodium ion battery of 100-160 Wh/kg, the cost is 0.4-0.7 yuan/Wh, which is far lower than the cost of 0.9-1.1 yuan/Wh of the lithium battery.
3. The invention has flexible design scheme, can design the product ratio according to market demand, and can improve the ratio of lithium battery materials if the product needs high specific energy, and the product needs low cost and can improve the ratio of sodium ion battery materials.
4. The cathode of the invention adopts hard carbon material, the cost of the hard carbon material is far lower than that of artificial graphite, natural graphite, silicon monoxide and silicon/carbon composite material, the dependence on fossil energy material can be eliminated after the hard carbon material is adopted in large scale, the manufacturing cost and energy consumption can be reduced in large scale, and the hard carbon composite material is a sustainable, energy-saving and environment-friendly low-cost technical scheme.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention.
The positive electrode component comprises: 40 kg of lithium iron phosphate material, 55 kg of O3-phase sodium-nickel-iron-manganese oxide material, 2 kg of carbon nano tube and 3 kg of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenization, then coating the slurry on an aluminum foil, rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 94 kg of hard carbon material, 2 kg of carbon nano tube, 2.5 kg of styrene butadiene rubber and 1.5 kg of CMC. Wherein the hard carbon materialCrystallite layer distance d 002 0.37-0.47 nm, chu Nake capacity 300mAh/g, specific surface area 1m 2 In terms of a particle size Dv50 of 5 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.2:0.8.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 1 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is 2-4.2V, the specific energy of the battery is 156Wh/kg under the multiplying power of 1C, and the first effect of the battery is 90%.
The battery cycle performance test of this example 1 was carried out by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = 300-week discharge capacity/first discharge capacity; the results are shown in Table 1.
Example 2
The positive electrode component comprises: 30 kg of lithium manganate material, 65 kg of O3 phase sodium nickel iron manganese oxide material, 2.2 kg of carbon nano tube and 2.5 kg of PAN binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on a carbon-coated aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 94 kg of hard carbon material, 2 kg of SP carbon black, 2.5 kg of styrene butadiene rubber and 1.5 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 320mAh/g, specific surface area of 1.2m 2 In terms of a particle size Dv50 of 3 μm. Taking the negative electrode component and water as componentsAnd adding the dispersing agent into a homogenizer for homogenizing, then coating the mixture on copper foil, rolling, slitting and welding to prepare the 18650 type cylindrical battery negative pole piece.
The membrane was taken as a commercial polyethylene membrane.
The electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled as follows: the mass ratio of the sodium ion electrolyte is 0.1:0.9.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 2 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is 2-4.2V, the specific energy of the battery is 155Wh/kg under the multiplying power of 1C, and the first effect of the battery is 89%.
The battery cycle performance test of this example 2 was carried out by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 3
The positive electrode component comprises: 60 kilograms of ternary lithium (811) material, 35 kilograms of O3-phase sodium-nickel-iron-manganese oxide material, 1.8 kilograms of carbon nano tube and 1.8 kilograms of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenization, then coating the slurry on an aluminum foil, rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 95 kg of hard carbon material, 1.5 kg of carbon tube, 2.5 kg of butadiene styrene rubber and 1 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 290mAh/g, specific surface area 1.1m 2 In terms of volume, the particle diameter Dv50 is 4 μm and the particle diameter Dv90 is 10 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.4:0.5.
the anode, the cathode, the electrolyte and the diaphragm prepared in the embodiment 3 are prepared into a 18650 battery according to the assembly process of the 18650 battery for testing, the tested voltage range is 2-4.2V, the specific energy of the battery is 210Wh/kg under the multiplying power of 1C, and the first efficiency of the battery is 88%.
The battery cycle performance test was performed on this example 3 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 4
Taking the positive pole component comprises: 20 kg of lithium iron manganese phosphate material, 75 kg of P2 phase sodium iron copper manganese oxide material, 2.5 kg of carbon nano tube and 2.5 kg of PAN binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 94.5 kg of hard carbon material, 1.5 kg of carbon tube, 2.5 kg of butadiene styrene rubber and 1.5 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 360mAh/g, specific surface area 1.5m 2 In terms of a particle size Dv50 of 2 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled as follows: the mass ratio of the sodium ion electrolyte is 0.4:0.5.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 4 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is 2-4.2V, the specific energy of the battery is 159Wh/kg under the multiplying power of 1C, and the first effect of the battery is 90%.
The battery cycle performance test of this example 4 was carried out by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage of 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 5
The positive electrode component comprises: 25 kg of lithium-rich manganese material, 70 kg of O3 phase sodium nickel iron manganese oxide material, 2.5 kg of carbon nano tube and 2.5 kg of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 94.5 kg of hard carbon material, 1.5 kg of carbon tube, 2.5 kg of butadiene styrene rubber and 1.5 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 360mAh/g, specific surface area 1.5m 2 In terms of a particle size Dv50 of 2 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.2:0.8.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 5 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is 2-4.2V, the specific energy of the battery is 192Wh/kg under the multiplying power of 1C, and the first efficiency of the battery is 82%.
The battery cycle performance test was performed on this example 5 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage of 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 6
The positive electrode component comprises: 15 kilograms of lithium iron manganese phosphate material, 80 kilograms of ferric sodium pyrophosphate material, 2 kilograms of carbon nano tubes and 3 kilograms of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component comprises: 96 kilograms of hard carbon material, 1 kilogram of carbon tube, 2 kilograms of butadiene styrene rubber and 1 kilogram of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 280mAh/g, specific surface area 1.1m 2 In terms of a particle size Dv50 of 5 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.1:0.9.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 6 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is between 2 and 4V, the specific energy of the battery is 158Wh/kg under the multiplying power of 1C, and the first effect of the battery is 91%.
The battery cycle performance test was performed on this example 6 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 7
The positive electrode component comprises: 30 kg of lithium iron phosphate material, 64.5 kg of sodium ferric pyrophosphate phosphate material, 2 kg of carbon nano tube, 1 kg of conductive graphite and 2.5 kg of PAN binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 95 kg of hard carbon material, 1.5 kg of carbon tube, 2.5 kg of butadiene styrene rubber and 1 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 0.37-0.47 nm, chu Nake capacity 300mAh/g, specific surface area 1.1m 2 In terms of a particle size Dv50 of 4 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.2:0.8.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 7 are prepared into a 18650 battery according to an assembly process of the 18650 battery, and the tested voltage range is 2-4V, the specific energy of the battery is 164Wh/kg under the multiplying power of 1C, and the first effect of the battery is 87%.
The battery cycle performance test was performed on this example 7 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage of 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 8
The positive electrode component comprises: 30 kg of ternary lithium (523) material, 65 kg of sodium ferric pyrophosphate phosphate material, 1.5 kg of carbon nano tube, 1 kg of conductive graphite and 2.5 kg of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 95 kg of hard carbon material, 1.5 kg of carbon tube, 2.5 kg of butadiene styrene rubber and 1 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 300mAh/g, specific surface area 1.1m 2 In terms of a particle size Dv50 of 4 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.2:0.8.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 8 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is 2-4.2V, the specific energy of the battery is 190Wh/kg under the multiplying power of 1C, and the first effect of the battery is 85%.
The battery cycle performance test was performed on this example 8 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage of 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 9
The positive electrode component comprises: 30 kg of lithium manganate material, 65 kg of sodium iron phosphate pyrophosphate material, 1 kg of carbon nano tube, 1 kg of conductive graphite and 2.5 kg of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 95 kg of hard carbon material, 1.5 kg of carbon tube, 2.5 kg of butadiene styrene rubber and 1 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 300mAh/g, specific surface area 1m 2 In terms of a particle size Dv50 of 4 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled as follows: the mass ratio of the sodium ion electrolyte is 0.2:0.8.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 9 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is 2-4.2V, the specific energy of the battery is 163Wh/kg under the multiplying power of 1C, and the first efficiency of the battery is 88%.
The battery cycle performance test was performed on this example 9 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage of 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = 300-week discharge capacity/first discharge capacity; the results are shown in Table 1.
Example 10
The positive electrode component comprises: 20 kg of lithium iron manganese phosphate material, 75 kg of Prussian white sodium salt material, 2.5 kg of carbon nano tube and 2.5 kg of PAN binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on a carbon-coated aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 94.5 kg of hard carbon material, 1.5 kg of carbon tube, 2.5 kg of butadiene styrene rubber and 1.5 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 360mAh/g, specific surface area 1.5m 2 In terms of a particle size Dv50 of 2 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.4:0.5.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 10 are prepared into a 18650 battery according to an assembly process of the 18650 battery, and the tested voltage range is 2-4V, the specific energy of the battery is 178Wh/kg under the multiplying power of 1C, and the first effect of the battery is 87%.
The battery cycle performance test was performed on this example 10 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage of 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 11
The positive electrode component comprises: 25 kg of ternary lithium (721) material, 70 kg of Prussian white sodium salt material, 2.4 kg of carbon nano tube and 2.6 kg of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenization, then coating the slurry on a carbon-coated aluminum foil, rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 95 kg of hard carbon material, 2 kg of carbon tubes, 2.5 kg of butadiene styrene rubber and 0.5 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 360mAh/g, specific surface area 1.5m 2 In terms of a particle size Dv50 of 2 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.2:0.8.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 11 are prepared into a 18650 battery according to an assembly process of the 18650 battery, and the tested voltage range is 2-4.2V, the specific energy of the battery is 183Wh/kg under the multiplying power of 1C, and the first effect of the battery is 85%.
The battery cycle performance test was performed on this example 11 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = 300-week discharge capacity/first discharge capacity; the results are shown in Table 1.
Example 12
The positive electrode component comprises: 40 kg of ternary lithium (622) material, 55 kg of Prussian white sodium salt material, 2.5 kg of carbon nano tube and 2.5 kg of PAN binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component comprises: 94 kg of hard carbon material, 2 kg of carbon tube, 2.5 kg of butadiene styrene rubber and 1.5 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 340mAh/g, specific surface area 1.2m 2 In terms of a particle size Dv50 of 5 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.4:0.5.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 12 are prepared into a 18650 battery according to an assembly process of the 18650 battery, and the tested voltage range is 2-4.2V, the specific energy of the battery is 205Wh/kg under the multiplying power of 1C, and the first effect of the battery is 83%.
The battery cycle performance test was performed on this example 12 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 13
The positive electrode component comprises: 42 kg of lithium iron phosphate material, 53 kg of O3 phase sodium-nickel-iron-manganese oxide material, 1.8 kg of carbon nano tube and 3.2 kg of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 47.6 kilograms of hard carbon material, 46.4 kilograms of artificial graphite, 2 kilograms of carbon nano tubes, 2.5 kilograms of styrene butadiene rubber and 1.5 kilograms of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, chu Nake capacity 300mAh/g, specific surface area 1m 2 In terms of a particle size Dv50 of 5 μm. Wherein the lithium storage gram capacity of the artificial graphite is 350mAh/g. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled as follows: the mass ratio of the sodium ion electrolyte is 0.5:0.5.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 1 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is 2-4.2V, the specific energy of the battery is 165Wh/kg under the multiplying power of 1C, and the first effect of the battery is 91%.
The battery cycle performance test of this example 1 was carried out by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage of 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 14
The positive electrode component comprises: 20 kilograms of lithium iron manganese phosphate material, 75 kilograms of Prussian white sodium salt material, 2.5 kilograms of carbon nano tubes and 2.5 kilograms of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenization, then coating the slurry on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 84.4 kg of hard carbon material, nitrous oxide11.1 kg of silicon-carbon composite material, 1.5 kg of carbon tube, 2.5 kg of butadiene styrene rubber and 1.5 kg of CMC. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.38-0.42 nm, chu Nake capacity 300mAh/g, specific surface area 1.5m 2 In terms of a particle size Dv50 of 2 μm. Wherein the lithium storage capacity of the silicon oxide-carbon composite material is 600mAh/g. And adding the negative electrode component and water serving as a dispersing agent into a homogenizer for homogenization, then coating the homogenate on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode sheet.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.2:0.8.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 10 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is 2-4.2V, the specific energy of the battery is 179Wh/kg under the multiplying power of 1C, and the first effect of the battery is 87%.
The battery cycle performance test of this example 1 was carried out by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Example 15
The positive electrode component comprises: the lithium manganate material is 25 kg, the Prussian white sodium salt material is 70 kg, the carbon nano tube is 2.4 kg, and the PVDF binder is 2.6 kg. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 84.4 kg of hard carbon material, 10.6 kg of nano silicon-carbon compound, 2 kg of carbon tube and 2.5 cm of styrene butadiene rubberJin, CMC0.5 kg. Wherein the crystallite layer distance d of the hard carbon material 002 = 0.37-0.47 nm, a gram capacity of 300mAh/g, a specific surface area of 1.5m2/g, and a particle diameter Dv50 of 2 μm. Wherein the lithium storage capacity of the nano silicon-carbon compound is 600mAh/g. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The obtained electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the lithium ion electrolyte is controlled: the mass ratio of the sodium ion electrolyte is 0.1:0.9.
the positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the embodiment 10 are prepared into a 18650 battery for testing according to the assembly process of the 18650 battery, the tested voltage range is 2-4.2V, the specific energy of the battery is 187Wh/kg under the multiplying power of 1C, and the first efficiency of the battery is 87%.
The battery cycle performance test of this example 1 was carried out by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Comparative example 1
The positive electrode component comprises: 95 kg of lithium manganate material, 2.5 kg of carbon nano tube and 2.5 kg of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 94.5 kg of artificial graphite, 1.5 kg of carbon tubes, 2.5 kg of styrene butadiene rubber and 1.5 kg of CMC. The artificial graphite lithium storage capacity is 350mAh/g, the negative electrode component and water are added into a homogenizer as a dispersing agent to be homogenized, then the homogenized mixture is coated on copper foil, and then rolling, slitting and welding are carried out to prepare the 18650 type cylindrical battery negative electrode plate.
The membrane was taken as a commercial polyethylene membrane.
The electrolyte is commercial lithium ion electrolyte.
The positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the comparative example 1 are prepared into a 18650 battery according to the assembly process of the 18650 battery for testing, the tested voltage range is 2.8-4.2V, the specific energy of the battery is 170Wh/kg under the multiplying power of 1C, and the first efficiency of the battery is 88%.
The battery cycle performance test was performed on this example 5 by the following method: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage of 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = 300-week discharge capacity/first discharge capacity; the results are shown in Table 1.
Comparative example 2
The positive electrode component comprises: 95 kg of O3 phase sodium nickel iron manganese oxide material, 2.2 kg of carbon nano tube and 2.5 kg of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenization, then coating the slurry on an aluminum foil, rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component comprises: 94 kg of hard carbon material, 2 kg of SP carbon black, 2.5 kg of styrene butadiene rubber and 1.5 kg of CMC. Wherein the microcrystal layer distance d002 of the hard carbon material is = 0.37-0.47 nm, the Chu Nake capacity is 320mAh/g, and the specific surface area is 1.2m 2 In terms of a particle size Dv50 of 3 μm. And adding the negative electrode component and water as a dispersing agent into a homogenizer for homogenizing, then coating the slurry on a copper foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The electrolyte is commercial sodium ion electrolyte.
The positive electrode, the negative electrode, the electrolyte and the diaphragm prepared in the comparative example 2 are prepared into a 18650 battery according to the assembly process of the 18650 battery, the tested voltage range is 2-4V, the specific energy of the battery is 140Wh/kg under the multiplying power of 1C, and the first effect of the battery is 86%.
Comparative example 2 was subjected to a battery cycle performance test, the test method being: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = 300-week discharge capacity/first discharge capacity; the results are shown in Table 1.
Comparative example 3
The positive electrode component comprises: 95 kg of ternary lithium (811) material, 2.5 kg of carbon nano tubes and 2.5 kg of PVDF binder. Adding positive electrode material components and NMP as a dispersing agent into a homogenizer for homogenizing, then coating on an aluminum foil, and then rolling, slitting and welding to prepare the 18650 type cylindrical battery positive electrode sheet.
The cathode component is taken to comprise: 94.5 kg of artificial graphite, 1.5 kg of carbon tubes, 2.5 kg of styrene butadiene rubber and 1.5 kg of CMC. The artificial graphite lithium storage capacity is 350mAh/g, the negative electrode component and water are added into a homogenizer as a dispersing agent for homogenization, then the slurry is coated on copper foil, and rolling, slitting and welding are carried out to prepare the 18650 type cylindrical battery negative electrode piece.
The membrane was taken as a commercial polyethylene membrane.
The electrolyte is commercial lithium ion electrolyte.
The anode, the cathode, the electrolyte and the diaphragm prepared in the comparative example 1 are prepared into a 18650 battery according to the assembly process of the 18650 battery for testing, the tested voltage range is 2.8-4.2V, the specific energy of the battery is 260Wh/kg under the multiplying power of 1C, and the first effect of the battery is 89%.
The comparative example 3 was subjected to a battery cycle performance test, the test method being: at a temperature of 25 DEG C
Keeping the constant current and the constant voltage at 1C to the upper limit voltage, and standing for 10min;
discharging at constant current to lower limit voltage at 1C, and standing for 10min;
repeating the process cycle for 300 times;
capacity retention rate at 300 weeks = discharge capacity at 300 weeks/first discharge capacity; the results are shown in Table 1.
Test example 1
The positive electrode, the negative electrode, the electrolyte and the separator prepared in examples 1 to 15 and comparative examples 1 to 3 were fabricated into 18650 cells according to the assembly process of 18650 cells, and then tested.
And (3) carrying out a battery cycle performance test on each battery, wherein the test method comprises the following steps: keeping the temperature at 25 ℃, keeping the constant current and the constant voltage of 1C to the upper limit voltage, and standing for 10min; discharging at constant current to lower limit voltage at 1C, and standing for 10min; repeating the process cycle for 300 times; capacity retention rate at 300 weeks = 300-week discharge capacity/first discharge capacity. The test results are shown in table 1.
TABLE 1
Figure BDA0003872877610000191
From table 1, it can be concluded that: the technical scheme of the invention has outstanding advantages and is mainly embodied in
1. The BOM cost is lower and is far lower than the 1 yuan/Wh cost of the conventional lithium battery;
2. the invention has higher safety and can pass the safety test of acupuncture;
3. the specific energy of the invention is far higher than that of the common sodium ion battery;
4. the cycle life of the lithium ion battery is longer than that of the conventional ternary lithium ion battery and lithium manganate lithium ion battery.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. A lithium-sodium hybrid ion battery comprising: a positive electrode component, a negative electrode component, characterized in that,
the positive electrode component comprises a lithium ion battery positive electrode material and a sodium ion battery positive electrode material;
the negative electrode material in the negative electrode component includes hard carbon.
2. The lithium-sodium hybrid ion battery according to claim 1,
the lithium ion battery positive electrode material comprises one or a combination of more of a lithium iron phosphate material, lithium manganate, lithium cobaltate, lithium iron manganese phosphate, lithium-rich manganese and a ternary lithium positive electrode material;
the positive electrode material of the sodium-ion battery comprises one or more of a P2 or O3 phase sodium metal oxide, a sodium phosphate or pyrophosphate compound and a sodium Prussian albino compound.
3. The lithium-sodium hybrid ion battery according to claim 1,
the crystallite layer distance d of the hard carbon material 002 0.37-0.47 nm, chu Nake with 200 mAh-600 mAh/g capacity and 0.5-3 m specific surface area 2 (iv)/g, the particle diameter Dv50 is 2 to 10 μm.
4. The lithium-sodium hybrid ion battery of claim 1, wherein the negative electrode material further comprises a combination of one or more selected from the group consisting of artificial graphite, natural graphite, mesocarbon microbeads, silica-carbon composites, and nano-silicon-carbon composites.
5. The lithium-sodium hybrid ion battery of claim 1, wherein the positive electrode component further comprises a positive electrode conductive agent and a positive electrode binder.
6. The lithium-sodium hybrid ion battery according to claim 5,
the mass ratio of the lithium ion battery anode material to the sodium ion battery anode material to the anode conductive agent to the anode binder is 5-99: 5 to 99:0.5 to 5:0.5 to 5;
the positive electrode conductive agent comprises one or more of carbon black, carbon nano tubes, carbon fibers, graphene and microcrystalline graphite;
the positive electrode binder comprises one or a combination of PVDF and PAN.
7. The lithium-sodium hybrid ion battery according to claim 1,
the negative electrode component further comprises a negative electrode conductive agent, a negative electrode binder and a negative electrode thickener.
8. The lithium-sodium hybrid ion battery according to claim 7,
the mass ratio of the negative electrode material, the negative electrode conductive agent, the negative electrode binder and the negative electrode thickener is 90-98: 1 to 5:1 to 5:0.5 to 5;
the negative electrode conductive agent comprises one or more of carbon black, carbon nano tubes, carbon fibers, graphene and microcrystalline graphite;
the negative electrode binder comprises one or more of sodium polyacrylate, styrene butadiene rubber, sodium alginate and polyacrylate copolymer;
the negative electrode thickener comprises one or more of CMC, hydroxypropyl methylcellulose and carboxyethyl methylcellulose.
9. The lithium-sodium hybrid ion battery according to claim 1,
the lithium-sodium mixed type ion battery also comprises electrolyte, wherein the electrolyte is a mixture of commercial lithium ion electrolyte and commercial sodium ion electrolyte, and the mass ratio of the lithium ion electrolyte to the sodium ion electrolyte is 0.1-0.9: 0.9 to 0.1.
10. The lithium-sodium hybrid ion battery of claim 1, further comprising a separator that is a commercial lithium ion battery separator comprising one or more of polyethylene, polypropylene, a ceramic separator surface-coated with alumina, or a composite separator surface-coated with PVDF.
CN202211202283.9A 2022-09-29 2022-09-29 Lithium-sodium mixed ion battery Pending CN115632174A (en)

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