CN107293727A - A kind of positive electrode, lithium ion battery comprising the positive electrode and preparation method thereof - Google Patents
A kind of positive electrode, lithium ion battery comprising the positive electrode and preparation method thereof Download PDFInfo
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- CN107293727A CN107293727A CN201710610430.9A CN201710610430A CN107293727A CN 107293727 A CN107293727 A CN 107293727A CN 201710610430 A CN201710610430 A CN 201710610430A CN 107293727 A CN107293727 A CN 107293727A
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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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
- 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
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- 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 invention discloses a kind of positive electrode, the positive electrode includes phosphoric acid vanadium lithium and active substance of lithium ion battery anode.Positive electrode of the present invention, used by the way that phosphoric acid vanadium lithium and active substance of lithium ion battery anode are carried out into blending, existing Cathode material for lithium ion batteries is substantially improved, serondary lithium battery high-energy-density, low temperature discharge, heavy-current discharge and high temperature safe characteristic has been taken into account.Simultaneously, invention additionally discloses a kind of lithium ion battery for including the positive electrode, the lithium ion battery energy density is high, voltage platform is high, have extended cycle life, low temperature performance excellent, rate charge-discharge performance are good, is well positioned to meet the requirement of digital product energy density and electric tool high current charge-discharge requirement.In addition, the present invention also provides a kind of preparation method of the lithium ion battery.
Description
Technical field
The present invention relates to a kind of lithium ion battery and preparation method thereof, especially a kind of positive electrode, the positive pole material is included
Lithium ion battery of material and preparation method thereof.
Background technology
Studying more anode material for lithium-ion batteries at present has LiCoO2(a-NaFeO2Type layer structure), lithium nickelate (a-
NaFeO2Type layer structure), cobalt nickel lithium manganate ternary material (a-NaFeO2Type layer structure), lithium manganate having spinel structure, phosphoric acid it is sub-
Iron lithium (olivine-type structure) etc..
Electrokinetic cell and energy storage sector application it is wide be to be made using LiFePO 4 and cobalt nickel lithium manganate ternary material
For the positive electrode of secondary lithium battery.But LiFePO4The major defect of material is that theoretical capacity is high, room-temperature conductivity
It is low, so as to cause that correspondence system battery low-temperature characteristics is bad and energy density is low；Though cobalt nickel lithium manganate ternary material has theory
The characteristics of gram volume is high, energy density is high, tap density is high, but low temperature and high temperature safe are relatively poor.
The content of the invention
Based on this, one kind is provided and has high-energy concurrently it is an object of the invention to overcome above-mentioned the deficiencies in the prior art part
The positive electrode of density and low temperature discharge.
To achieve the above object, the technical solution used in the present invention is：A kind of positive electrode, includes phosphoric acid vanadium lithium and lithium
Ion battery positive active material.
Phosphoric acid vanadium lithium belongs to monocline, has the advantages that high, the de- embedded performance of lithium ion diffusion coefficient is good, therefore phosphoric acid
Vanadium lithium battery low temperature performance well, rate charge-discharge excellent performance, in theory gram volume reach as high as more than 200mAh/.
Positive electrode of the present invention, carries out blending by phosphoric acid vanadium lithium and active substance of lithium ion battery anode and uses, no
Only energy density is high, and has improved low temperature discharge ability, large current discharging capability and heat endurance.And this area
Technical staff can be according to purposes needs, and arbitrarily both selection determination phosphoric acid vanadium lithium and active substance of lithium ion battery anode is mixed
Composition and division in a proportion example.
Preferably, weight/mass percentage composition of the phosphoric acid vanadium lithium in the positive electrode is 5%~90%.
Preferably, the active substance of lithium ion battery anode includes nickle cobalt lithium manganate (LiNixCoyMn1-x-yO2), cobalt acid
Lithium (LiCoO2), lithium nickelate (LiNiO2), nickel cobalt lithium aluminate, LiMn2O4, LiFePO4 (LiFePO4), in lithium ferric manganese phosphate extremely
Few one kind.
Preferably, the molecular formula of the nickel cobalt lithium aluminate is LiNixCoyAlzO2, wherein, x+y+z=1,0<x<1,0<y<
1,0<z<0.1.
Meanwhile, the present invention also provides a kind of lithium ion battery for including above-mentioned positive electrode.Lithium ion battery energy of the present invention
Metric density is high, voltage platform is high, have extended cycle life, low temperature performance excellent, rate charge-discharge performance are good, meets digital product energy
Density requirements and the requirement of electric tool high current charge-discharge, are particularly suitable for the relatively low regional hybrid vehicle of temperature, pure electronic
Automobile, automobile starting power supply, large-scale power station energy-storage system.
Preferably, the negative material of the li-ion electrode is lithium titanate, carbon based negative electrodes material, tin base cathode material, silicon
At least one of base negative material, silicon-base alloy negative material.
In addition, the present invention also provides a kind of preparation method of above-mentioned lithium ion battery, comprise the following steps：
(1) positive electrode is mixed with binding agent, conductive agent, solvent, stirred, obtain anode sizing agent, positive pole is starched
Material is spread evenly across on aluminium foil, and aluminium foil then is obtained into positive plate through vacuum bakeout, roll-in, cutting；
(2) negative material is mixed with binding agent, conductive agent, solvent, stirred, obtain cathode size, negative pole is starched
Material is spread evenly across on aluminium foil or copper foil, and aluminium foil or copper foil then are obtained into negative plate through vacuum bakeout, roll-in, cutting；
(3) negative plate obtained by positive plate obtained by step (2) and step (3) is subjected to vacuum bakeout 2~48 hours, then will
Positive plate, negative plate, barrier film are wound or lamination, obtain battery core；
(4) battery core obtained by step (3) is loaded in battery container, it is small that battery container then is carried out into vacuum bakeout 2~96
When, then fluid injection, chemical conversion, partial volume in the cell housing, obtain the lithium ion battery.
Preferably, the time of vacuum bakeout is vacuum bakeout in 4~12 hours, the step (2) in the step (1)
Time is 4~12 hours.
Preferably, the solvent in the step (1) is 1-METHYLPYRROLIDONE.
Relative to prior art, beneficial effects of the present invention are：
Positive electrode of the present invention, is made by the way that phosphoric acid vanadium lithium and active substance of lithium ion battery anode are carried out into blending
With, substantially improve existing Cathode material for lithium ion batteries, taken into account serondary lithium battery high-energy-density, low temperature discharge,
Heavy-current discharge and high temperature safe characteristic.
Lithium ion battery energy density that the present invention is obtained is high, voltage platform is high, have extended cycle life, low temperature performance excellent,
Rate charge-discharge performance is good, is well positioned to meet the requirement of digital product energy density and electric tool high current charge-discharge requirement,
It is particularly suitable for the relatively low regional hybrid vehicle of temperature, pure electric automobile, automobile starting power supply, large-scale power station energy-storage system.
Embodiment
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment to the present invention
It is described further.
Embodiment 1
A kind of embodiment of positive electrode of the present invention, positive electrode described in the present embodiment contains comprising following quality percentage
The composition of amount：
Phosphoric acid vanadium lithium 5%, active substance of lithium ion battery anode 95%, the active substance of lithium ion battery anode are nickel
Cobalt manganic acid lithium.
The present embodiment also provides a kind of lithium ion battery for including above-mentioned positive electrode, the negative pole material of the li-ion electrode
Expect for lithium titanate.
A kind of preparation method of above-mentioned lithium ion battery of the present embodiment, comprises the following steps：
(1) positive electrode is mixed with binding agent, conductive agent, 1-METHYLPYRROLIDONE, stirred, obtain positive pole slurry
Material, anode sizing agent is spread evenly across on aluminium foil, aluminium foil then is obtained into positive plate through vacuum bakeout 8 hours, roll-in, cutting；
(2) negative material is mixed with binding agent, conductive agent, solvent, stirred, obtain cathode size, negative pole is starched
Material is spread evenly across on aluminium foil, and aluminium foil then is obtained into negative plate through vacuum bakeout 12 hours, roll-in, cutting；
(3) negative plate obtained by positive plate obtained by step (2) and step (3) is subjected to vacuum bakeout 2 hours, then by positive pole
Piece, negative plate, barrier film are wound or lamination, obtain battery core；
(4) battery core obtained by step (3) is loaded in battery container, battery container is then subjected to vacuum bakeout 96 hours,
Again in the cell housing fluid injection (electrolyte be 1mol LiPF6+EC:DMC:EMC, solvent volume ratio is 1:1:1), by chemical conversion,
Partial volume, obtains 18650 lithium ion battery, and capacity is 1500mAh, nominal voltage 2.4V.
Embodiment 2
A kind of embodiment of positive electrode of the present invention, positive electrode described in the present embodiment contains comprising following quality percentage
The composition of amount：
Phosphoric acid vanadium lithium 90%, active substance of lithium ion battery anode 10%, the active substance of lithium ion battery anode is
Nickel cobalt lithium aluminate, the molecular formula of the nickel cobalt lithium aluminate is LiNixCoyAlzO2, wherein, x+y+z=1,0<x<1,0<y<1,0<
z<0.1；
The present embodiment also provides a kind of lithium ion battery for including above-mentioned positive electrode, the negative pole material of the li-ion electrode
Expect for graphite.
A kind of preparation method of above-mentioned lithium ion battery of the present embodiment, comprises the following steps：
(1) positive electrode is mixed with binding agent, conductive agent, 1-METHYLPYRROLIDONE, stirred, obtain positive pole slurry
Material, anode sizing agent is spread evenly across on aluminium foil, aluminium foil then is obtained into positive plate through vacuum bakeout 4 hours, roll-in, cutting；
(2) negative material is mixed with binding agent, conductive agent, solvent, stirred, obtain cathode size, negative pole is starched
Material is spread evenly across on copper foil, and copper foil then is obtained into negative plate through vacuum bakeout 8 hours, roll-in, cutting；
(3) negative plate obtained by positive plate obtained by step (2) and step (3) is subjected to vacuum bakeout 24 hours, then will just
Pole piece, negative plate, barrier film are wound or lamination, obtain battery core；
(4) battery core obtained by step (3) is loaded in battery container, battery container is then subjected to vacuum bakeout 48 hours,
Again in the cell housing fluid injection (electrolyte be 1mol LiPF6+EC:DMC:EMC, solvent volume ratio is 1:1:1), by chemical conversion,
Partial volume, obtains 18650 lithium ion battery, and capacity is 1400mAh, nominal voltage 3.7V.
Embodiment 3
A kind of embodiment of positive electrode of the present invention, positive electrode described in the present embodiment contains comprising following quality percentage
The composition of amount：
Phosphoric acid vanadium lithium 45%, active substance of lithium ion battery anode 55%, the active substance of lithium ion battery anode is
LiMn2O4；
The present embodiment also provides a kind of lithium ion battery for including above-mentioned positive electrode, the negative pole material of the li-ion electrode
Expect for graphite cathode material.
A kind of preparation method of above-mentioned lithium ion battery of the present embodiment, comprises the following steps：
(1) positive electrode is mixed with binding agent, conductive agent, 1-METHYLPYRROLIDONE, stirred, obtain positive pole slurry
Material, anode sizing agent is spread evenly across on aluminium foil, aluminium foil then is obtained into positive pole through vacuum bakeout 12 hours, roll-in, cutting
Piece；
(2) negative material is mixed with binding agent, conductive agent, solvent, stirred, obtain cathode size, negative pole is starched
Material is spread evenly across on copper foil, and copper foil then is obtained into negative plate through vacuum bakeout 4 hours, roll-in, cutting；
(3) negative plate obtained by positive plate obtained by step (2) and step (3) is subjected to vacuum bakeout 48 hours, then will just
Pole piece, negative plate, barrier film are wound or lamination, obtain battery core；
(4) battery core obtained by step (3) is loaded in battery container, battery container is then subjected to vacuum bakeout 2 hours, then
(electrolyte is 1mol LiPF6+EC for fluid injection in the cell housing:DMC:EMC, solvent volume ratio is 1:1:1), by being melted into, dividing
Hold, obtain 18650 lithium ion battery, capacity is 1700mAh, nominal voltage 3.7V.
Embodiment 4
The present embodiment sets two groups of comparative examples, by lithium in the low temperature charge-discharge performance of comparative example battery and embodiment 1~3 from
The performance of sub- battery is analyzed.
Comparative example 1
This comparative example 1 provides a kind of lithium ion battery, and the positive electrode of the lithium ion battery is nickle cobalt lithium manganate；It is described
The negative material of lithium ion battery is graphite cathode material.
The preparation method of the lithium ion battery, comprises the following steps：
(1) positive electrode is mixed with binding agent, conductive agent, 1-METHYLPYRROLIDONE, stirred, obtain positive pole slurry
Material, anode sizing agent is spread evenly across on aluminium foil, aluminium foil then is obtained into positive pole through vacuum bakeout 12 hours, roll-in, cutting
Piece；
(2) negative material is mixed with binding agent, conductive agent, solvent, stirred, obtain cathode size, negative pole is starched
Material is spread evenly across on copper foil, and copper foil then is obtained into negative plate through vacuum bakeout 4 hours, roll-in, cutting；
(3) negative plate obtained by positive plate obtained by step (2) and step (3) is subjected to vacuum bakeout 48 hours, then will just
Pole piece, negative plate, barrier film are wound or lamination, obtain battery core；
(4) battery core obtained by step (3) is loaded in battery container, battery container is then subjected to vacuum bakeout 2 hours, then
(electrolyte is 1mol LiPF6+EC for fluid injection in the cell housing:DMC:EMC, solvent volume ratio is 1:1:1), by being melted into, dividing
Hold, obtain 18650 lithium ion battery, capacity is 2200mAh, nominal voltage 3.7V.
Comparative example 2
This comparative example 2 provides a kind of lithium ion battery, and the positive electrode of the lithium ion battery is nickle cobalt lithium manganate；It is described
The negative material of lithium ion battery is lithium titanate anode material.
The preparation method of the lithium ion battery, comprises the following steps：
(1) positive electrode is mixed with binding agent, conductive agent, 1-METHYLPYRROLIDONE, stirred, obtain positive pole slurry
Material, anode sizing agent is spread evenly across on aluminium foil, aluminium foil then is obtained into positive pole through vacuum bakeout 12 hours, roll-in, cutting
Piece；
(2) negative material is mixed with binding agent, conductive agent, solvent, stirred, obtain cathode size, negative pole is starched
Material is spread evenly across on aluminium foil, and aluminium foil then is obtained into negative plate through vacuum bakeout 4 hours, roll-in, cutting；
(3) negative plate obtained by positive plate obtained by step (2) and step (3) is subjected to vacuum bakeout 48 hours, then will just
Pole piece, negative plate, barrier film are wound or lamination, obtain battery core；
(4) battery core obtained by step (3) is loaded in battery container, battery container is then subjected to vacuum bakeout 2 hours, then
(electrolyte is 1mol LiPF6+EC for fluid injection in the cell housing:DMC:EMC, solvent volume ratio is 1:1:1), by being melted into, dividing
Hold, obtain 18650 lithium ion battery, capacity is 1500mAh, nominal voltage 2.4V.
Experimental test
Embodiment 1~3 and the operating voltage of the lithium ion battery of comparative example 1~2, low temperature performance are tested；
Testing standard and method reference《QCT743-2006 lithiums used for electric vehicle are from battery standard》, wherein -20 DEG C of low temperature discharges are surveyed
Examination：
(a) lithium ion battery charges by 1/3C multiplying powers；
(b) lithium ion battery stores 20h at -20 DEG C ± 2 DEG C；
(c)) lithium ion battery at -20 DEG C ± 2 DEG C with 1/3C5A multiplying powers current discharge (illustratively, 1/3C5A=1/3
It is multiplied by battery core nominal capacity), until cell voltage reaches discharge off specified in final discharging voltage or enterprise technology condition
(wherein, the final discharging voltage of embodiment 2,3 and comparative example 2 is 2.75V to voltage；The discharge off of embodiment 1 and comparative example 1
Voltage is 1.50V)；
(d) calculated with the current value and discharge time data of (c) lithium ion battery discharge capacity (in terms of Ah=discharge
Electric current is multiplied by discharge time), and it is expressed as the percentage of nominal discharge capacity.
The method of testing of battery core capacity is as follows：
Under the conditions of charge-discharge test instrument (holding up a day BS-9365 test cabinets in Guangzhou) measure rated temperature and charging and discharging currents
The capacity of battery core；
Cryostat (the high prosperous detection device GX-3000-80L high/low temperatures insulating box of the Dongguan City) setting used and satisfaction
The cryogenic conditions that standard testing needs.
This test evaluates the low temperature performance of material and battery core using -20 DEG C of low temperature discharge rates；Phase is contrasted respectively
With negative pole system, embodiment 1 is contrasted with comparative example 2；Embodiment 2,3 is contrasted with comparative example 1；As a result it is as shown in table 1：
The performance of lithium ion battery test result of the embodiment 1~3 of table 1 and comparative example 1~2
Be can be seen that from the data of table one under the premise of negative material identical, mixed type anode material and secondary lithium from
The low temperature discharge performance of sub- battery is more prominent.It follows that the mixed type anode material and secondary lithium-ion battery core of the present invention
With more prominent cryogenic discharging characteristic and dynamic performance.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected
The limitation of scope is protected, although being explained in detail with reference to preferred embodiment to the present invention, one of ordinary skill in the art should
Understand, technical scheme can be modified or equivalent substitution, without departing from the essence of technical solution of the present invention
And scope.
Claims (9)
1. a kind of positive electrode, it is characterised in that include phosphoric acid vanadium lithium and active substance of lithium ion battery anode.
2. positive electrode as claimed in claim 1, it is characterised in that quality of the phosphoric acid vanadium lithium in the positive electrode
Percentage composition is 5%~90%.
3. positive electrode as claimed in claim 1 or 2, it is characterised in that the active substance of lithium ion battery anode includes
At least one of nickle cobalt lithium manganate, cobalt acid lithium, lithium nickelate, nickel cobalt lithium aluminate, LiMn2O4, LiFePO4, lithium ferric manganese phosphate.
4. positive electrode as claimed in claim 3, it is characterised in that the molecular formula of the nickel cobalt lithium aluminate is
LiNixCoyAlzO2, wherein, x+y+z=1,0<x<1,0<y<1,0<z<0.1.
5. a kind of lithium ion battery for including any one of the Claims 1 to 4 positive electrode.
6. lithium ion battery as claimed in claim 5, it is characterised in that the negative material of the li-ion electrode is metatitanic acid
At least one of lithium, carbon based negative electrodes material, tin base cathode material, silicon based anode material, silicon-base alloy negative material.
7. the preparation method of a kind of lithium ion battery as described in claim 5 or 6, it is characterised in that comprise the following steps：
(1) positive electrode is mixed with binding agent, conductive agent, solvent, stirred, obtain anode sizing agent, anode sizing agent is equal
It is even to be coated on aluminium foil, aluminium foil is then obtained into positive plate through vacuum bakeout, roll-in, cutting；
(2) negative material is mixed with binding agent, conductive agent, solvent, stirred, obtain cathode size, cathode size is equal
It is even to be coated on aluminium foil or copper foil, aluminium foil or copper foil are then obtained into negative plate through vacuum bakeout, roll-in, cutting；
(3) negative plate obtained by positive plate obtained by step (2) and step (3) is subjected to vacuum bakeout 2~48 hours, then by positive pole
Piece, negative plate, barrier film are wound or lamination, obtain battery core；
(4) battery core obtained by step (3) is loaded in battery container, battery container is then subjected to vacuum bakeout 2~96 hours, then
Fluid injection, chemical conversion, partial volume, obtain the lithium ion battery in the cell housing.
8. the preparation method of lithium ion battery as claimed in claim 7, it is characterised in that vacuum bakeout in the step (1)
Time be 4~12 hours, the time of vacuum bakeout is 4~12 hours in the step (2).
9. the preparation method of lithium ion battery as claimed in claim 7, it is characterised in that the solvent in the step (1) is
1-METHYLPYRROLIDONE.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109346726A (en) * | 2018-11-12 | 2019-02-15 | 合肥斯姆雷品牌管理有限公司 | A kind of high temperature modification manganese systems lithium battery anode |
| CN109546109A (en) * | 2018-11-12 | 2019-03-29 | 合肥斯姆雷品牌管理有限公司 | A kind of high-temperature stable lithium battery anode |
| CN110277546A (en) * | 2018-03-15 | 2019-09-24 | 株式会社理光 | Anode, lithium ion secondary battery and anode composite material coating fluid |
| CN112864360A (en) * | 2019-11-28 | 2021-05-28 | 珠海冠宇电池股份有限公司 | High-voltage positive pole piece and lithium ion secondary battery containing same |
| CN112928248A (en) * | 2020-11-17 | 2021-06-08 | 风帆有限责任公司 | Positive active material of lithium battery, preparation method and preparation method of lithium battery |
| CN113113581A (en) * | 2021-03-18 | 2021-07-13 | 清华大学 | Nickel-cobalt-manganese ternary composite material and preparation method and application thereof |
| WO2023070306A1 (en) * | 2021-10-26 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Battery pack and electric apparatus |
| WO2023108639A1 (en) * | 2021-12-17 | 2023-06-22 | 宁德时代新能源科技股份有限公司 | Positive electrode composite material for lithium ion secondary battery, and lithium ion secondary battery |
| CN116435582A (en) * | 2023-04-24 | 2023-07-14 | 湖南添越能源科技有限公司 | Lithium ion battery capable of realizing instant high-energy high-rate discharge |
| WO2024016153A1 (en) * | 2022-07-19 | 2024-01-25 | 宁德时代新能源科技股份有限公司 | Battery pack and electric device |
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Application publication date: 20171024 |