CN106784997A - A kind of emergency starting ultra-high magnification lithium ion battery - Google Patents
A kind of emergency starting ultra-high magnification lithium ion battery Download PDFInfo
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- 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
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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Abstract
The invention provides a kind of emergency starting ultra-high magnification lithium ion battery, the anode sizing agent of the battery is made up of following raw material：Small particle porous spherical cobalt acid lithium, superconductive carbon black, CNT, Kynoar and solvent N dimethyl pyrrolidones are made, the cathode size of the battery is made up of cladded type Delanium, superconductive carbon black, butadiene-styrene rubber, sodium carboxymethylcellulose and deionized water, contain by least two additive packages for constituting in sulfuric acid vinyl ester, sulfuric acid glycol ester and ethidene sulfate in electrolyte, to lift the high-temperature behavior of battery.The pulsed discharge performance of lithium ion battery of the present invention is greatly promoted, pulse multiplying power can be up to more than 260C, simultaneously the battery possess good high and low temperature service behaviour, can at 20 DEG C~65 DEG C normal work, meet startup demand of the automobile under different temperatures environment.
Description
Technical field
The invention belongs to technical field of lithium ion, and in particular to a kind of emergency starting ultra-high magnification lithium ion electricity
Pond.
Background technology
With the development of science and technology, the continuous improvement of people's living standard, one kind that automobile has become people is ridden instead of walk work
Tool, in the crowd more than 4 years, quite a few people once lived through the situation that automobile cannot start because storage battery feeds.Automobile
Emergency starting power supply is aiming at a kind of very strong product of practicality that above-mentioned emergency case is developed.Start electricity as car emergency
Source needs to have power output required during automobile starting, under -20~65 DEG C of environment can normal work, in high temperature environments
Long-time storage (inside maximum temperature of the summer vehicle after outdoors sunlight is exposed to the sun is up to 60~80 degree), is provided simultaneously with portable
Performance it is good the features such as.
In recent years, cobalt acid lithium lithium ion battery energy density was high, good cycle, currently as automobile starting power supply
It is widely accepted.In order to meet the startup requirement of relatively high power vehicle, the capacity of lithium ion battery is also to do bigger and bigger, volume and
Weight increases therewith, and comparatively, power density turns into an important indicator of people's selection.Therefore lithium-ion electric is continued to lift up
The pulsed discharge performance in pond has compared urgently for seizing market.
The content of the invention
The technical problems to be solved by the invention are for above-mentioned the deficiencies in the prior art, there is provided a kind of emergency starting is used
Ultra-high magnification lithium ion battery.The pulse behaviors of the lithium ion battery are increased dramatically, and are provided simultaneously with good high and low temperature work
Make performance and good storge quality.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of emergency starting with ultra-high magnifications lithium from
Sub- battery, is mainly made up of positive plate, negative plate, positive pole ear, negative lug, barrier film, electrolyte and pack case, the positive pole
Piece is that anode sizing agent is coated on aluminium foil, is then obtained through drying, roll-in and punching molding successively, and the negative plate is will be negative
Pole slurry is coated on Copper Foil, is then obtained through drying, roll-in and punching molding successively, and the ultra-high magnification lithium ion battery is
Refer to lithium ion battery of the pulse multiplying power in more than 260C, it is characterised in that：
The anode sizing agent is made up of following raw material：
A) positive active material：Small particle porous spherical cobalt acid lithium, its particle diameter D50It it is 1 μm~4 μm, specific surface area is
0.7m2/ g~1.3m2/g；
B) conductive agent：Superconductive carbon black and CNT；
C) binding agent：Kynoar；
D) solvent：N- dimethyl pyrrolidones；
The cathode size is made up of following raw material：
A') negative electrode active material：Cladded type Delanium, it is amorphous that the cladded type Delanium refers to that Surface coating has
The small particle Delanium of carbon, the particle diameter D of the cladded type Delanium50It it is 5 μm~8 μm, specific surface area is 1.5m2/ g~
2.5m2/g；
B') conductive agent：Superconductive carbon black；
C') binding agent：Butadiene-styrene rubber；
D') additive：Sodium carboxymethylcellulose；
E') solvent：Deionized water.
A kind of above-mentioned emergency starting ultra-high magnification lithium ion battery, it is characterised in that：Prepare the process of anode sizing agent
In, the addition of small particle porous spherical cobalt acid lithium is the 90.0%~97.0% of positive pole solid masses, superconductive carbon black plus
It is the 1.0~5.0% of positive pole solid masses to enter amount, and the addition of CNT is the 0.5%~4.0% of positive pole solid masses,
The addition of Kynoar is positive pole for the addition of 1.0%~5.0%, the N- dimethyl pyrrolidones of positive pole solid masses
The 50%~80% of solid masses, the positive pole solid masses is small particle porous spherical cobalt acid lithium, superconductive carbon black, carbon nanometer
The quality sum of pipe and Kynoar.
A kind of above-mentioned emergency starting ultra-high magnification lithium ion battery, it is characterised in that：Prepare the process of cathode size
In, the addition of cladded type Delanium is the 90.0%~97.0% of negative pole solid masses, and the addition of superconductive carbon black is
The 1.0%~5.0% of negative pole solid masses, the addition of butadiene-styrene rubber is the 1.0%~5.0% of negative pole solid masses, carboxylic first
The addition of base sodium cellulosate is the 1.0%~5.0% of negative pole solid masses, and the addition of deionized water is negative pole solid masses
1~2 times, the negative pole solid masses be cladded type Delanium, superconductive carbon black, butadiene-styrene rubber and sodium carboxymethylcellulose
Quality sum.
A kind of above-mentioned emergency starting ultra-high magnification lithium ion battery, it is characterised in that：The two-sided deposited charge level of positive plate
Density is 110g/m2~200g/m2, compacted density is 3.2g/m3~3.9g/m3；The two-sided deposited charge level density of the negative plate is
60g/m2~110g/m2, compacted density is 1.3g/m3~1.7g/m3。
A kind of above-mentioned emergency starting ultra-high magnification lithium ion battery, it is characterised in that：The barrier film is coated for surface
There is the polypropylene diaphragm of ceramics.
A kind of above-mentioned emergency starting ultra-high magnification lithium ion battery, it is characterised in that：The porosity of the barrier film is
40%~60%.
A kind of above-mentioned emergency starting ultra-high magnification lithium ion battery, it is characterised in that：The electrolyte is by lithium salts, molten
Agent and additive mixed preparing are formed, and the additive is by sulfuric acid vinyl ester, sulfuric acid glycol ester and ethidene sulfate
At least two compositions mixed type additives, the quality of the additive accounts for the 0.5%~5% of electrolyte gross mass.
A kind of above-mentioned emergency starting ultra-high magnification lithium ion battery, it is characterised in that：The lithium salts is hexafluorophosphoric acid
Lithium, the solvent is the mixed liquor of ethylene carbonate, dimethyl carbonate and diethyl carbonate.
The present invention has advantages below compared with prior art：
1st, in the present invention, it is positive-active to use the small particle porous spherical cobalt acid lithium with specified particle diameter and specific surface area
Material, is negative electrode active material with the cladded type Delanium with specified particle diameter and specific surface area, and by positive pole dispensing
Middle addition CNT, greatly improves the high current pulsed discharge ability of battery；The emergency starting prepared using the present invention is used
The pulsed discharge performance of lithium ion battery is up to more than 260C, is provided simultaneously with good high and low temperature service behaviour and good height
Warm storage capacity, can at -20 DEG C~65 DEG C normal work, meet startup demand of the automobile under different temperatures environment.
2nd, the present invention contains at least two in sulfuric acid vinyl ester, sulfuric acid glycol ester and ethidene sulfate in the electrolytic solution
Composition additive package is planted, the emergency starting lithium ion battery of preparation can be stored at least 7 days under 65 DEG C of environment, at 85 DEG C
At least 8h is stored under environment.
3rd, emergency starting lithium ion battery of the invention, addition is dissolved in the CNT of NMP in anode sizing agent, greatly
Accelerate its dispersibility, improve slurry stability and coating stability.
4th, emergency starting lithium ion battery of the invention possesses the excellent pulse cycle life-span, can add up to start 4000 times
More than.
The present invention is described in further detail with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is the emergency starting ultra-high magnification lithium ion battery of the embodiment of the present invention 1 under the conditions of normal temperature (23 DEG C ± 2 DEG C)
The pulsed discharge curve map of 260C.
Fig. 2 is the pulse of the emergency starting ultra-high magnification lithium ion battery 260C under the conditions of -20 DEG C of the embodiment of the present invention 1
Discharge curve.
Fig. 3 is the pulse of the emergency starting ultra-high magnification lithium ion battery 260C under the conditions of 60 DEG C of the embodiment of the present invention 1
Discharge curve.
Fig. 4 is the arteries and veins of the emergency starting lithium ion battery of the embodiment of the present invention 1 260C under the conditions of normal temperature (23 DEG C ± 2 DEG C)
Punching circulation discharge curve.
Specific embodiment
Embodiment 1
The pulse multiplying power of the present embodiment the emergency starting ultra-high magnifications of more than 260C lithium ion battery, including positive pole
Piece, negative plate, barrier film, electrolyte, positive pole ear, negative lug and pack case, and the battery uses small particle porous spherical
To be added with CNTs in positive active material and anode sizing agent, it is negative electrode active material to use cladded type Delanium to cobalt acid lithium.
The preparation method of the lithium ion battery of the present embodiment ultra-high magnifications is：
Step one, preparation anode sizing agent：With N- dimethyl pyrrolidones (NMP) as solvent, with small particle porous spherical cobalt
Sour lithium (LiCoO2) (the particle diameter D of the small particle porous spherical cobalt acid lithium50It it is 1 μm~4 μm, specific surface area is 0.7m2/ g~
1.3m2/ g) it is positive active material, it is conduction with superconductive carbon black (Super-P) and CNT (CNTs, solid content 5%)
Agent, with Kynoar (PVDF) as binding agent.The mass ratio of each raw material is：LiCoO2∶Super-P∶CNTs：PVDF∶NMP
=95: 2.0: 1.0: 2.0: 65.During specific preparation, first by LiCoO2, Super-P and PVDF in batch mixer pre-dispersed 1h~
2h, obtains cathode mix；CNTs is added in NMP, 2h~4h is stirred, the glue containing CNTs is prepared；Afterwards will just
Pole mixture is added in the glue containing CNTs by several times, and de-bubbled is vacuumized after stirring 5h~8h, obtains anode sizing agent.
The particle diameter D of the small particle porous spherical cobalt acid lithium50In 1 μm~4 μ ms, specific surface area is in 0.7m2/ g~
1.3m2In/g range.The small particle porous spherical cobalt acid lithium can be obtained by buying the approach of existing product, it is also possible to by existing
There is technology to make by oneself to obtain.During self-control, first by cobalt compound (in cobalt oxide, cobalt chloride and cobalt oxalate any one or a few) and
Polyurethanes is mixed and made into mixed material, is subsequently adding surfactant (sapn and/or tween), external coating oxide
Precursor (in aluminium hydroxide, magnesium hydroxide, manganous hydroxide, zirconium hydroxide, stannic hydroxide and platinic hydroxide one or more)
With aqueous solutions of polymers (the poly- second that mass concentration is 4%~10% polyvinyl alcohol water solution or mass concentration is 4%~10%
Two alcohol solutions) stir, the mixture for stirring is heated to 40 DEG C~60 DEG C 1.5~3.0h of concentration afterwards, obtain
Gel；Then by the gel under the conditions of 100 DEG C~200 DEG C heat resolve 3h~5h；The gel after heat resolve is existed again
6h~10h is calcined under the conditions of 400 DEG C~800 DEG C, cobalt salt presoma is obtained；By Li2CO3It is well mixed with cobalt salt presoma, after will
Well mixed mixture is calcined 8h~12h under the conditions of 800 DEG C~1000 DEG C, and sieving is ground after natural cooling, and screen cloth is 400
Eye mesh screen, obtains small particle porous spherical cobalt acid lithium.
Step 2, making positive plate：The anode sizing agent that will be prepared in step one is coated in current collector aluminum foil, and control is double
Dressing surface density in face is 120g/m2, compacted density is 3.5g/m3, the aluminium foil after coating is through drying, roll-in and punching molding, completion
The making of positive plate.
Step 3, preparation cathode size：With deionized water (H2O it is) solvent, with cladded type Delanium (cladded type people
Graphite is made for Surface coating has the irregular Delanium of the small particle of amorphous carbon, the particle diameter D of the cladded type Delanium50It is 5 μ
M~8 μm, specific surface area is 1.5m2/ g~2.5m2/ g) it is negative electrode active material, it is conduction with superconductive carbon black (Super-P)
Agent, with butadiene-styrene rubber (SBR) as binding agent, sodium carboxymethylcellulose (CMC) is additive.The mass ratio of each raw material is：Bag
Cover type Delanium: Super-P: SBR: CMC: H2O=94.5: 2: 2: 1.5: 150.It is first that cladded type is artificial during specific preparation
Graphite and Super-P pre-dispersed 1h~2h in batch mixer, make conductive agent be dispersed in cladded type Delanium surface, obtain
Negative electrode mix；Then CMC is added in deionized water, stirs 3h~4h, prepare the CMC aqueous solution；Negative pole is mixed afterwards
Thing is added in the CMC aqueous solution by several times, and SBR is added after stirring 6h~10h, continues to vacuumize de-bubbled after stirring 1h~2h, is obtained
Cathode size.
The particle diameter D of the cladded type Delanium50At 5 μm~8 μm, specific surface area is 1.5m2/ g~2.5m2/g.The bag
Covering type Delanium can be obtained by buying the approach of existing product, it is also possible to made by oneself by prior art and obtained.During self-control, will
Delanium, covering material (coal tar, selected from coal tar pitch and petroleum asphalt any one or a few), solvent (gasoline, carbolineum, diformazan
Benzene, diesel oil etc. any one or a few) at a temperature of 150 DEG C~300 DEG C mix, vacuumize, desolvation, by Delanium
It is coated in covering material；Then thermal polymerization is carried out at a temperature of material being placed in into 300 DEG C~600 DEG C, polymerization pressure is
0.8MPa~3MPa, the reaction time is 200min~400min；It is finally carried out into stone under conditions of 2500 DEG C~3000 DEG C
Mo Hua, obtains the irregular Delanium of small particle of Surface coating amorphous carbon.
Step 4, making negative plate：The cathode size that will be prepared in step 3 is coated on the copper foil of affluxion body of roughening,
Control two-sided deposited charge level density is in 65g/m2, compacted density is 1.4g/m3, coating pole piece is through drying, roll-in and is punched aftershaping,
Complete the making of negative plate.
Step 5, electrolyte quota：Lithium salts is lithium hexafluoro phosphate (LiPF6), lithium salt is 1mol/L in electrolyte；It is molten
Agent is the mixed liquor of ethylene carbonate (EC), dimethyl carbonate (DMC) and diethyl carbonate (DEC), and mass ratio is EC:DMC:
DEC=5:3:2, sulfuric acid vinyl ester, sulfuric acid glycol ester, the additive package quality hundred of ethidene sulfate composition in electrolyte
Point than (three's mass ratio is 1 for 3.0%:1:1).
Battery before step 6, making chemical conversion：Positive plate, negative plate and the barrier film that will be punched by barrier film, negative pole, barrier film,
The order of positive pole, barrier film and negative pole is stacked gradually, and is combined into battery core, and its septation is from the PP barrier films for being coated with ceramics.It is described
The porosity of barrier film is 40%~60%, and the battery core being combined into utilizes positive pole ear (aluminium pole ears) and negative lug (copper nickel plating pole
Ear) carry out ultrasonic bonding；The battery core that will have been welded is put into aluminum-plastic packaged shell and is once encapsulated；By what is once encapsulated
Battery core toasts 24h in 80 DEG C~85 DEG C of temperature under conditions of vacuum≤- 0.08MPa, inject electrolyte, the battery core after fluid injection
It is to be changed after standing 24h~48h.
The chemical conversion of step 7, battery：Chemical conversion uses 0.05C constant current charge 2h, stands 10min, 0.2C constant current charges
2h；Then pumping and secondary encapsulation are completed；4.2V is finally charged to using 1C constant current constant voltage patterns, 1C constant current discharges are extremely
3.0V, 1C constant current constant voltage pattern charge to 3.9V, complete chemical conversion.
Fig. 1 is the emergency starting ultra-high magnification lithium ion battery of the embodiment of the present invention 1 under the conditions of normal temperature (23 DEG C ± 2 DEG C)
Pulsed discharge curve map.As shown in Figure 1, the battery that prepared by the embodiment of the present invention 1 shelves 10s using 260C electric discharge 1s, circulates
Electric discharge 5 times, minimum knee voltage can reach more than 2.7V.
Fig. 2 is the pulsed discharge under the conditions of the emergency starting ultra-high magnification lithium ion battery of the embodiment of the present invention 1 is spent -20
Curve map.As shown in Figure 2, after the battery that prepared by the embodiment of the present invention 1 deposits 4h under the conditions of -20 DEG C, using 260C electric discharge 1s,
10s is shelved, circulation is discharged 5 times, and minimum knee voltage can reach more than 2.4V.
Fig. 3 is pulsed discharge of the emergency starting ultra-high magnification lithium ion battery of the embodiment of the present invention 1 under the conditions of 60 DEG C
Curve map.From the figure 3, it may be seen that after battery prepared by the embodiment of the present invention 1 deposits 4h under the conditions of 60 DEG C, using 260C electric discharge 1s,
10s is shelved, circulation is discharged 5 times, and minimum knee voltage can reach more than 2.8V.
Fig. 4 is arteries and veins of the superelevation emergency starting lithium ion battery of the embodiment of the present invention 1 under the conditions of normal temperature (23 DEG C ± 2 DEG C)
Punching circulation discharge curve.As shown in Figure 4, the battery 260C electric discharge 1s that prepared by the embodiment of the present invention 1, circulation discharge time can be with
Reach more than 4000 times.
Embodiment 2
The lithium ion battery of the present embodiment emergency starting ultra-high magnifications the difference is that only with embodiment 1：Step
LiCoO described in one2∶Super-P∶CNTs：PVDF: NMP=94: 2.5: 1.5: 2.0: 68, positive plate described in step 2
Two-sided deposited charge level density is 120g/m2, compacted density is 3.4g/m3, cladded type Delanium described in step 3: Super-P:
SBR∶CMC∶H2O=95: 3: 1: 1: 160, the two-sided deposited charge level density of negative plate described in step 4 is 65g/m2, compacted density
It is 1.3g/m3.Sulfuric acid vinyl ester in electrolyte described in step 5 (its mass concentration in the electrolytic solution is 0.25%), sulfuric acid
The additive package of glycol ester (its mass concentration in the electrolytic solution is 0.25%) composition.
Embodiment 3
The lithium ion battery of the present embodiment emergency starting ultra-high magnifications the difference is that only with embodiment 1：Step
LiCoO described in one2∶Super-P∶CNTs：PVDF: NMP=96: 2: 1: 1: 70, the two-sided deposited of positive plate described in step 2
Charge level density is 120g/m2, compacted density is 3.6g/m3, cladded type Delanium described in step 3: Super-P: SBR: CMC
∶H2O=95.5: 1: 3: 0.5: 160, the two-sided deposited charge level density of negative plate described in step 4 is 65g/m2, compacted density is
1.6g/m3.Sulfuric acid vinyl ester in electrolyte described in step 5 (its mass concentration in the electrolytic solution is 2.0%), sulfuric acid second
(its mass concentration in the electrolytic solution is for diol ester (its mass concentration in the electrolytic solution be 1.0%), ethidene sulfate
2.0%) additive package of composition.
Embodiment 4
The lithium ion battery of the present embodiment emergency starting ultra-high magnifications the difference is that only with embodiment 1：Step
LiCoO described in one2∶Super-P∶CNTs：PVDF: NMP=95: 1.5: 2.5: 1.0: 65, positive plate described in step 2
Two-sided deposited charge level density is 140g/m2, compacted density is 3.5g/m3, cladded type Delanium described in step 3: Super-P:
SBR∶CMC∶H2O=95: 1.5: 1: 2.5: 140, the two-sided deposited charge level density of negative plate described in step 4 is 75g/m2, compacting
Density is 1.5g/m3.Sulfuric acid vinyl ester in electrolyte described in step 5 (its mass concentration in the electrolytic solution is 2.0%),
The additive package of ethidene sulfate (its mass concentration in the electrolytic solution is 2.0%) composition.
Embodiment 5
The lithium ion battery of the present embodiment emergency starting ultra-high magnifications the difference is that only with embodiment 1：Step
LiCoO described in one2∶Super-P∶CNTs：PVDF: NMP=90: 5: 4: 1: 50, the two-sided deposited of positive plate described in step 2
Charge level density is 110g/m2, compacted density is 3.2g/m3, cladded type Delanium described in step 3: Super-P: SBR: CMC
∶H2O=90: 5: 1: 4: 200, the two-sided deposited charge level density of negative plate described in step 4 is 60g/m2, compacted density is 1.7g/
m3.Sulfuric acid vinyl ester in electrolyte described in step 5 (its mass concentration in the electrolytic solution is 0.025%), sulfuric acid ethylene glycol
The additive package of ester (its mass concentration in the electrolytic solution is 0.025%) composition.
Embodiment 6
The lithium ion battery of the present embodiment emergency starting ultra-high magnifications the difference is that only with embodiment 1：Step
LiCoO described in one2∶Super-P∶CNTs：PVDF: NMP=97: 1: 1: 1: 80, the two-sided deposited of positive plate described in step 2
Charge level density is 200g/m2, compacted density is 3.9g/m3, cladded type Delanium described in step 3: Super-P: SBR: CMC
∶H2O=97: 1: 5: 4: 100, the two-sided deposited charge level density of negative plate described in step 4 is 110g/m2, compacted density is 1.5g/
m3.Sulfuric acid vinyl ester in electrolyte described in step 5 (its mass concentration in the electrolytic solution is 0.05%), sulfuric acid ethylene glycol
The additive package of ester (its mass concentration in the electrolytic solution is 0.05%) composition.
Embodiment 7
The lithium ion battery of the present embodiment emergency starting ultra-high magnifications the difference is that only with embodiment 1：Step
LiCoO described in one2∶Super-P∶CNTs：PVDF: NMP=90: 3: 4: 3: 70, the two-sided deposited of positive plate described in step 2
Charge level density is 180g/m2, compacted density is 3.6g/m3, cladded type Delanium described in step 3: Super-P: SBR: CMC
∶H2O=93: 1: 1: 5: 150, the two-sided deposited charge level density of negative plate described in step 4 is 100g/m2, compacted density is 1.6g/
m3.Sulfuric acid vinyl ester in electrolyte described in step 5 (its mass concentration in the electrolytic solution is 0.08%), sulfuric acid ethylene glycol
The additive package of ester (its mass concentration in the electrolytic solution is 0.1%) composition.
To verify technological innovation of the invention, inventor spy has carried out comparative testing below：
Comparative example 1
This comparative example compared with Example 1, the difference is that only in step 5 without additive.Electrolyte quota：
Lithium salts is lithium hexafluoro phosphate (LiPF6), lithium salt is 1mol/L in electrolyte；Solvent is ethylene carbonate (EC), carbonic acid two
The mixed liquor of methyl esters (DMC) and diethyl carbonate (DEC), mass ratio is EC:DMC:DEC=5:3:2.
Comparative example 2
This comparative example lithium ion battery is not added with CNTs in using common cobalt acid lithium for positive active material and anode sizing agent,
It is negative electrode active material to use common Delanium.The preparation method of this comparative example lithium ion battery is：
Step one, preparation anode sizing agent：With N- dimethyl pyrrolidones (NMP) as solvent, with particle diameter D50It is 6 μm~10 μ
M, specific surface area are 0.4m2/ g~0.6m2General spherical shape cobalt acid lithium (the LiCoO of/g2) it is positive active material, to superconduct charcoal
Black (Super-P) is conductive agent, with vinylidene (PVDF) as binding agent.The mass ratio of each raw material is：LiCoO2∶Super-
P: PVDF: NMP=96: 1.5: 2.5: 65.During specific preparation, first by LiCoO2, Super-P and PVDF it is pre-dispersed in batch mixer
1h~2h, obtains cathode mix, and then cathode mix is added in NMP, and de-bubbled is vacuumized after stirring 5h~8h, obtains
To anode sizing agent.
Step 2, making positive plate：The anode sizing agent that will be prepared is coated in current collector aluminum foil, two-sided deposited charge level density
It is 140g/m2, compacted density is 3.5g/m3, the aluminium foil after coating is through drying, roll-in and punching molding, the system of completion positive plate
Make.
Step 3, preparation cathode size：With deionized water (H2O it is) solvent, with particle diameter D50It is 8.5 μm~10.5 μm, ratio
Surface area is 1.0m2/ g~1.4m2The common Delanium of/g is negative electrode active material, is to lead with superconductive carbon black (Super-P)
Electric agent, with butadiene-styrene rubber (SBR) as binding agent, sodium carboxymethylcellulose (CMC) is additive.The mass ratio of each raw material is：
Common Delanium: Super-P: SBR: CMC: H2O=94.5: 2: 2: 1.5: 150.During specific preparation, first by common artificial stone
Ink and Super-P pre-dispersed 1h~2h in batch mixer, make conductive agent be dispersed in Delanium surface, obtain negative pole mixing
Thing；Then CMC is added in deionized water, stirs 3h~4h, prepare the CMC aqueous solution；The negative electrode mix that will be handled well point
Add twice in the above-mentioned CMC aqueous solution, SBR is added after stirring 6h~10h, continue to vacuumize de-bubbled after stirring 1h~2h, obtain
To cathode size.
Step 4, making negative plate：The cathode size that will be prepared is coated on the copper foil of affluxion body of roughening, two-sided dressing
Surface density is in 70g/m2, compacted density is 1.4g/m3, coating pole piece is through drying, roll-in and is punched aftershaping, completes negative plate
Make.
Step 5, electrolyte quota：Lithium salts is lithium hexafluoro phosphate (LiPF6), lithium salt is 1mol/L in electrolyte；It is molten
Agent is the mixed liquor of ethylene carbonate (EC), dimethyl carbonate (DMC) and diethyl carbonate (DEC), and mass ratio is EC:DMC:
DEC=5:3:2, sulfuric acid vinyl ester, sulfuric acid glycol ester, the additive package quality hundred of ethidene sulfate composition in electrolyte
Point than (three's mass ratio is 1 for 3.0%:1:1).
Battery before step 6, making chemical conversion：The positive and negative plate that to be punched and barrier film by barrier film, negative pole, barrier film, positive pole,
The order of barrier film and negative pole is stacked gradually and is combined into battery core, and its septation uses ceramic coating membrane.The battery core being combined into is utilized
Positive pole ear (aluminium pole ears) and negative lug (copper nickel plating lug) carry out ultrasonic bonding；The battery core that will have been welded puts into plastic-aluminum
Once encapsulated in pack case；By the battery core that once encapsulates in 80 DEG C~85 DEG C of temperature, the bar of vacuum≤- 0.08MPa
24h is toasted under part；Injection electrolyte；It is to be changed after battery core standing 24h~48h after fluid injection.
The chemical conversion of step 7, battery：Chemical conversion uses 0.05C constant current charge 2h, stands 10min, 0.2C constant current charges
2h；Then pumping and secondary encapsulation are completed；4.2V is finally charged to using 1C constant current constant voltage patterns, 1C constant current discharges are extremely
3.0V, 1C constant current constant voltage pattern charge to 3.9V, complete chemical conversion.
Comparative example 3
This comparative example lithium ion battery use the porous crystal lithium cobalt acid of small particle for positive active material and anode sizing agent in not
Addition CNTs, it is negative electrode active material to use common Delanium.The preparation method of this comparative example lithium ion battery is：
Step one, preparation anode sizing agent：With N- dimethyl pyrrolidones (NMP) as solvent, with particle diameter D50For 1 μm~4 μm,
Specific surface area is the spherical lithium cobalt (LiCoO of 0.7g/ ㎡~1.3g/ ㎡2) it is positive active material, with superconductive carbon black
(Super-P) it is conductive agent, with Kynoar (PVDF) as binding agent.The mass ratio of each raw material is：LiCoO2∶Super-
P: PVDF: NMP=96: 1.5: 2.5: 65.During specific preparation, first by LiCoO2, Super-P and PVDF it is pre-dispersed in batch mixer
1h~2h, obtains cathode mix, is then added in NMP cathode mix by several times, and degassing is vacuumized after stirring 5h~8h
Bubble, obtains anode sizing agent.
Step 2, making positive plate：The anode sizing agent that will be prepared is coated in current collector aluminum foil, two-sided deposited charge level density
It is 140g/m2, compacted density is 3.5g/m3, the aluminium foil after coating is through drying, roll-in and punching molding, the system of completion positive plate
Make.
Step 3, preparation cathode size：With deionized water (H2O it is) solvent, with particle diameter D50It is 8.5 μm~10.5 μm, ratio
Surface area is 1.0m2/ g~1.4m2The common Delaniums of/g are negative electrode active material, are conduction with superconductive carbon black (Super-P)
Agent, with butadiene-styrene rubber (SBR) as binding agent, sodium carboxymethylcellulose (CMC) is additive.The mass ratio of each raw material is：It is general
Logical Delanium: Super-P: SBR: CMC: H2O=94.5: 2: 2: 1.5: 150.During specific preparation, first by common Delanium
With Super-P in batch mixer pre-dispersed 1h~2h, conductive agent is dispersed in Delanium surface, obtain negative pole mixing
Thing；Then CMC is added in deionized water, stirs 3h~4h, prepare the CMC aqueous solution；The negative electrode mix that will be handled well point
Add twice in the above-mentioned CMC aqueous solution, SBR is added after stirring 6h~10h, continue to vacuumize de-bubbled after stirring 1h~2h, obtain
To cathode size.
Step 4, making negative plate：The cathode size that will be prepared is coated on the copper foil of affluxion body of roughening, two-sided dressing
Surface density is in 70g/m2, compacted density is 1.4g/m3, coating pole piece is through drying, roll-in and is punched aftershaping, completes negative plate
Make.
Step 5, electrolyte quota：Lithium salts is lithium hexafluoro phosphate (LiPF6), lithium salt is 1mol/L in electrolyte；It is molten
Agent is the mixed liquor of ethylene carbonate (EC), dimethyl carbonate (DMC) and diethyl carbonate (DEC), and mass ratio is EC:DMC:
DEC=5:3:2, sulfuric acid vinyl ester mass percent is that 3.0%, sulfuric acid glycol ester mass percent is 3.0% in electrolyte.
Battery before step 6, making chemical conversion：The positive and negative plate that to be punched and barrier film by barrier film, negative pole, barrier film, positive pole,
The order of barrier film and negative pole is stacked gradually and is combined into battery core, and its septation uses ceramic coating membrane.The battery core being combined into is utilized
Positive pole ear (aluminium pole ears) and negative lug (copper nickel plating lug) carry out ultrasonic bonding；The battery core that will have been welded puts into plastic-aluminum
Once encapsulated in pack case；By the battery core that once encapsulates in 80 DEG C~85 DEG C of temperature, the bar of vacuum≤- 0.08MPa
24h is toasted under part；Injection electrolyte；It is to be changed after battery core standing 24h~48h after fluid injection.
The chemical conversion of step 7, battery：Chemical conversion uses 0.05C constant current charge 2h, stands 10min, 0.2C constant current charges
2h；Then pumping and secondary encapsulation are completed；4.2V is finally charged to using 1C constant current constant voltage patterns, 1C constant current discharges are extremely
3.0V, 1C constant current constant voltage pattern charge to 3.9V, complete chemical conversion.
Comparative example 4
This comparative example lithium ion battery adds in using the porous crystal lithium cobalt acid of small particle for positive active material and anode sizing agent
Added with CNTs, it is negative electrode active material to use common Delanium.The preparation method of this comparative example lithium ion battery is：
The preparation method of this comparative example lithium ion battery is：
Step one, preparation anode sizing agent：With N- dimethyl pyrrolidones (NMP) as solvent, with particle diameter D50For 1 μm~4 μm,
Specific surface area is 0.7m2/ g~1.3m2The small particle porous spherical cobalt acid lithium (LiCoO of/g2) it is positive active material, with superconduction
Electric carbon black (Super-P) and CNT (CNTs solid contents 5%) are conductive agent, with Kynoar (PVDF) as binding agent.
The mass ratio of each raw material is：LiCoO2∶Super-P∶CNTs：PVDF: NMP=95: 1.5: 2.5: 1.0: 65.It is specific to prepare
When, first by LiCoO2, Super-P and PVDF pre-dispersed 1h~2h in batch mixer, obtain cathode mix, then CNTs is added
Enter in NMP, stir 2h~4h, prepare the glue containing CNTs, be afterwards added to containing CNTs's cathode mix by several times
In glue, de-bubbled is vacuumized after stirring 5h~8h, obtain anode sizing agent.
Step 2, making positive plate：The anode sizing agent that will be prepared is coated in current collector aluminum foil, two-sided deposited charge level density
It is 140g/m2, compacted density is 3.5g/m3, the aluminium foil after coating is through drying, roll-in and punching molding, the system of completion positive plate
Make.
Step 3, preparation cathode size：With deionized water (H2O it is) solvent, with particle diameter D50It is 8.5 μm~10.5 μm, ratio
Surface area is 1.0m2/ g~1.4m2The common Delanium of/g is negative electrode active material, is to lead with superconductive carbon black (Super-P)
Electric agent, with butadiene-styrene rubber (SBR) as binding agent, sodium carboxymethylcellulose (CMC) is additive.The mass ratio of each raw material is：
Common Delanium: Super-P: SBR: CMC: H2O=94.5: 2: 2: 1.5: 150.During specific preparation, first by common artificial stone
Ink and Super-P pre-dispersed 1h~2h in batch mixer, make conductive agent be dispersed in Delanium surface, obtain negative pole mixing
Thing；Then CMC is added in deionized water, stirs 3h~4h, prepare the CMC aqueous solution；The negative electrode mix that will be handled well point
Add twice in the above-mentioned CMC aqueous solution, SBR is added after stirring 6h~10h, continue to vacuumize de-bubbled after stirring 1h~2h, obtain
To cathode size.
Step 4, making negative plate：The cathode size that will be prepared is coated on the copper foil of affluxion body of roughening, two-sided dressing
Surface density is in 70g/m2, compacted density is 1.4g/m3, coating pole piece is through drying, roll-in and is punched aftershaping, completes negative plate
Make.
Step 5, electrolyte quota：Lithium salts is lithium hexafluoro phosphate (LiPF6), lithium salt is 1mol/L in electrolyte；It is molten
Agent is the mixed liquor of ethylene carbonate (EC), dimethyl carbonate (DMC) and diethyl carbonate (DEC), and mass ratio is EC:DMC:
DEC=5:3:2, in electrolyte sulfuric acid vinyl ester mass percent be 0.2%, sulfuric acid glycol ester mass percent be 0.1%,
Ethidene sulfate mass percent is 0.2% composition additive package.
Battery before step 6, making chemical conversion：The positive and negative plate that to be punched and barrier film by barrier film, negative pole, barrier film, positive pole,
The order of barrier film and negative pole is stacked gradually and is combined into battery core, and its septation uses ceramic coating membrane.The battery core being combined into is utilized
Positive pole ear (aluminium pole ears) and negative lug (copper nickel plating lug) carry out ultrasonic bonding；The battery core that will have been welded puts into plastic-aluminum
Once encapsulated in pack case；By the battery core that once encapsulates in 80 DEG C~85 DEG C of temperature, the bar of vacuum≤- 0.08MPa
24h is toasted under part；Injection electrolyte；It is to be changed after battery core standing 24h~48h after fluid injection.
The chemical conversion of step 7, battery：Chemical conversion uses 0.05C constant current charge 2h, stands 10min, 0.2C constant current charges
2h；Then pumping and secondary encapsulation are completed；4.2V is finally charged to using 1C constant current constant voltage patterns, 1C constant current discharges are extremely
3.0V, 1C constant current constant voltage pattern charge to 3.9V, complete chemical conversion.
Comparative example 5
This comparative example lithium ion battery is added with CNTs in using common cobalt acid lithium for positive active material and anode sizing agent,
It is negative electrode active material to use cladded type Delanium.The preparation method of this comparative example lithium ion battery is：
Step one, preparation anode sizing agent：With N- dimethyl pyrrolidones (NMP) as solvent, with particle diameter D50It is 6 μm~10 μ
M, specific surface area are 0.4m2/ g~0.6m2General spherical shape cobalt acid lithium (the LiCoO of/g2) be for positive active material, to superconduct
Carbon black (Super-P) and CNT (CNTs solid contents 5%) are conductive agent, with Kynoar (PVDF) as binding agent.Respectively
The mass ratio of raw material is：LiCoO2∶Super-P∶CNTs：PVDF: NMP=95: 1.5: 2.5: 1.0: 65.During specific preparation,
First by LiCoO2, Super-P and PVDF pre-dispersed 1h~2h in batch mixer, obtain cathode mix, then CNTs is added
To in NMP, 2h~4h is stirred, prepare the glue containing CNTs, cathode mix is added to the glue containing CNTs by several times afterwards
In liquid, de-bubbled is vacuumized after stirring 5h~8h, obtain anode sizing agent.
Step 2, making positive plate：The anode sizing agent that will be prepared is coated in current collector aluminum foil, two-sided deposited charge level density
It is 140g/m2, compacted density is 3.5g/m3, the aluminium foil after coating is through drying, roll-in and punching molding, the system of completion positive plate
Make.
Step 3, preparation cathode size：With deionized water (H2O it is) solvent, with particle diameter D50It is 5 μm~8 μm, specific surface area
It is 1.5m2/ g~2.5m2The cladded type Delanium of/g is negative electrode active material, is conduction with superconductive carbon black (Super-P)
Agent, with butadiene-styrene rubber (SBR) as binding agent, sodium carboxymethylcellulose (CMC) is additive.The mass ratio of each raw material is：Bag
Cover type Delanium: Super-P: SBR: CMC: H2O=94.5: 2: 2: 1.5: 150.It is first that cladded type is artificial during specific preparation
Graphite and Super-P pre-dispersed 1h~2h in batch mixer, make conductive agent be dispersed in cladded type Delanium surface, obtain
Negative electrode mix；Then CMC is added in deionized water, stirs 3h~4h, prepare the CMC aqueous solution；The negative pole that will be handled well
Mixture is added in the above-mentioned CMC aqueous solution at twice, and SBR is added after stirring 6h~10h, is vacuumized after continuation stirring 1h~2h de-
Bubble, obtains cathode size.
Step 4, making negative plate：The cathode size that will be prepared is coated on the copper foil of affluxion body of roughening, two-sided dressing
Surface density is in 70g/m2, compacted density is 1.4g/m3, coating pole piece is through drying, roll-in and is punched aftershaping, completes negative plate
Make.
Step 5, electrolyte quota：Lithium salts is lithium hexafluoro phosphate (LiPF6), lithium salt is 1mol/L in electrolyte；It is molten
Agent is the mixed liquor of ethylene carbonate (EC), dimethyl carbonate (DMC) and diethyl carbonate (DEC), and mass ratio is EC:DMC:
DEC=5:3:2, in electrolyte sulfuric acid vinyl ester mass percent be 2.0%, sulfuric acid glycol ester mass percent be 2.0%,
Ethidene sulfate mass percent is 1.0% composition additive package.
Battery before step 6, making chemical conversion：The positive and negative plate that to be punched and barrier film by barrier film, negative pole, barrier film, positive pole,
The order of barrier film and negative pole is stacked gradually and is combined into battery core, and its septation uses ceramic coating membrane.The battery core being combined into is utilized
Positive pole ear (aluminium pole ears) and negative lug (copper nickel plating lug) carry out ultrasonic bonding；The battery core that will have been welded puts into plastic-aluminum
Once encapsulated in pack case；By the battery core that once encapsulates in 80 DEG C~85 DEG C of temperature, the bar of vacuum≤- 0.08MPa
24h is toasted under part；Injection electrolyte；It is to be changed after battery core standing 24h~48h after fluid injection.
The chemical conversion of step 7, battery：Chemical conversion uses 0.05C constant current charge 2h, stands 10min, 0.2C constant current charges
2h；Then pumping and secondary encapsulation are completed；4.2V is finally charged to using 1C constant current constant voltage patterns, 1C constant current discharges are extremely
3.0V, 1C constant current constant voltage pattern charge to 3.9V, complete chemical conversion.
After using above example and comparative example to be prepared into nominal capacity for the battery of 2600mAh, following performance inspection is carried out
Survey.
In below testing, battery standard charges：Under normal temperature (23 DEG C ± 2 DEG C), 1C mA constant-current constant-voltage chargings cut to 4.2V
Only electric current is 0.03C mA.
1st, high-temperature storage performance test
After battery standard is charged, after being stored under its specified conditions, the thickness swelling and outward appearance of battery, detection are measured
The results are shown in Table 1.
It can be seen that：In comparative example 1, when electrolyte is not added with additive, equal gas in 65 DEG C and 85 DEG C storing process of battery
It is swollen.With the addition of lithium ion additive in embodiment 1~7 and comparative example 2~5, non-inflatable in 65 DEG C and 85 DEG C of storing process.
Therefore, sulfuric acid vinyl ester, sulfuric acid glycol ester, the additive package of ethidene sulfate composition, Ke Yiyou are added in electrolyte
The high-temperature storage performance of the improvement lithium ion battery of effect.
The high-temperature storage result of the test of table 1
2nd, normal temperature pulse behaviors test
After battery standard charges, pulsed discharge is carried out in such a way：
Pulsed discharge (1)：Discharging condition, electric current 390A (150C), discharge time 1s, interval 10s, reignition 5 times；
Pulsed discharge (2)：Discharging condition, electric current 676A (260C), discharge time 1s, interval 10s, reignition 5 times；
Specific test result is shown in Table 2, from test data as can be seen that after being tested according to pulsed discharge (1), embodiment 1~7
Minimum knee voltage in more than 3.5V, the minimum knee voltage of the knee voltage of comparative example 2~5 is in more than 2.3V, embodiment phase
Knee voltage high about 1.2V minimum than comparative example.According to pulsed discharge (2) test after, the knee voltage of embodiment 1~7 2.7V with
On, and comparative example can not then discharge.Therefore, embodiment normal temperature pulse behaviors are better than comparative example normal temperature pulse behaviors, and embodiment
Normal temperature pulse multiplying power can reach 260C pulsed discharges.
The normal temperature of table 2 (23 DEG C ± 2 DEG C) pulse behaviors test result
3rd, high/low temperature pulse behaviors test
After battery standard charges, after it is deposited into 4h under the conditions of specified temp (- 20 DEG C of low temperature, 60 DEG C of high temperature), carry out
Following pulsed discharge test：
Pulsed discharge (1)：Discharging condition, electric current 390A (150C), discharge time 1S, interval 10s, reignition 5 times；
Pulsed discharge (2)：Discharging condition, electric current 676A (260C), discharge time 1S, interval 10s, reignition 5 times；
- 20 DEG C of test results of low temperature, are shown in Table 3.Be can be seen that from test data after being tested according to pulsed discharge (1), it is real
The minimum knee voltage of example 1~7 is applied in more than 3.2V, the minimum knee voltage of comparative example 2~5 in more than 1.9V, compare by embodiment
The minimum knee voltage of comparative example about 1.3V high.According to pulsed discharge (2) test after, the knee voltage of embodiment 1~7 2.4V with
On, and comparative example can not then discharge.
60 DEG C of test results of high temperature are shown in Table 3, as can be seen that after being tested according to pulsed discharge (1), implementing from test data
The minimum knee voltage of example 1~7 is in more than 3.6V, and the minimum knee voltage of the knee voltage of comparative example 2~5 is real in more than 2.4V
Example is applied compared to the minimum knee voltage of comparative example about 1.2V high.After being tested according to pulsed discharge (2), the knee voltage of embodiment 1~7 exists
More than 2.8V, and comparative example can not then discharge.
Therefore, embodiment high/low temperature pulse behaviors are superior to comparative example, and embodiment is in -20 DEG C of low temperature and 65 DEG C of conditions of high temperature
260C pulsed discharges can be reached down.
The pulse behaviors after 4h are deposited under 3-20 DEG C of cryogenic conditions of table
The pulse behaviors after 4h are deposited under 4 60 DEG C of hot conditions of table
4th, cycle performance test
Cycle performance method of testing：
Charge：7.8A (3C) constant-current charge turns 4.2V constant-voltage charges to electric current 78mA (0.03C) to 4.2V；
Electric discharge：Discharge current 676A (260C), discharge time 1s；Shelve 10s；Reignition 8 times；
Repeat above charge and discharge cycles 500 weeks.Discharge and recharge time interval 30min.
By embodiment battery according to above-mentioned method of testing charge and discharge cycles 500 weeks after, the pulse minimum voltage of battery still may be used
To ensure more than 2.5V.I.e. the cycle-index of battery can reach more than 4000 times.
With reference to above the performance test results, it is a discovery of the invention that by using particle diameter D50For 1 μm~4 μm, specific surface area are
0.7m2/ g~1.3m2The small particle porous spherical cobalt acid lithium of/g is positive active material, while using particle diameter D50It is 5 μm~8 μ
M, specific surface area are 1.5m2/ g~2.5m2The cladded type Delanium of/g is negative electrode active material, can greatly improve battery
Pulse behaviors；In addition, adding CNTs in anode sizing agent, also there is influence higher to the lifting of pulse behaviors.It is comprehensive positive and negative
Pole activating agent adds liftings of the CNTS to pulse behaviors to reach maximum.Test at present can meet the pulsed discharge ability of 260C.
Another of the invention adding in the electrolytic solution is constituted by by least two in sulfuric acid vinyl ester, sulfuric acid glycol ester and ethidene sulfate
Additive package, can effectively improve the high-temperature storage performance of lithium ion battery.Institute's preparing lithium ion battery of the present invention is entered
Row high-temperature storage and cycle performance are tested, battery can meet can at -20 DEG C~65 DEG C normal work, and can be in 85 DEG C of rings
At least more than 8h is stored under border；Cycle-index can reach more than 4000 times.
The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions.It is every according to invention skill
Any simple modification, change and equivalence change that art is substantially made to above example, still fall within technical solution of the present invention
Protection domain in.
Claims (8)
1. a kind of emergency starting ultra-high magnification lithium ion battery, mainly by positive plate, negative plate, positive pole ear, negative lug,
Barrier film, electrolyte and pack case composition, the positive plate is that anode sizing agent is coated on aluminium foil, then successively through drying, roller
Pressure and punching molding are obtained, and the negative plate is that cathode size is coated on Copper Foil, then successively through drying, roll-in and punching
Shaping is obtained, and the ultra-high magnification lithium ion battery refers to lithium ion battery of the pulse multiplying power in more than 260C, it is characterised in that：
The anode sizing agent is made up of following raw material：
A) positive active material：Small particle porous spherical cobalt acid lithium, its particle diameter D50It it is 1 μm~4 μm, specific surface area is 0.7m2/g
~1.3m2/g；
B) conductive agent：Superconductive carbon black and CNT；
C) binding agent：Kynoar；
D) solvent：N- dimethyl pyrrolidones；
The cathode size is made up of following raw material：
A') negative electrode active material：Cladded type Delanium, the cladded type Delanium refers to that Surface coating has amorphous carbon
Small particle Delanium, the particle diameter D of the cladded type Delanium50It it is 5 μm~8 μm, specific surface area is 1.5m2/ g~2.5m2/
g；
B') conductive agent：Superconductive carbon black；
C') binding agent：Butadiene-styrene rubber；
D') additive：Sodium carboxymethylcellulose；
E') solvent：Deionized water.
2. a kind of emergency starting ultra-high magnification lithium ion battery according to claim 1, it is characterised in that：Prepare positive pole
During slurry, the addition of small particle porous spherical cobalt acid lithium is the 90.0%~97.0% of positive pole solid masses, superconduction
The addition of electric carbon black is the 1.0%~5.0% of positive pole solid masses, and the addition of CNT is positive pole solid masses
0.5%~4.0%, the addition of Kynoar is 1.0%~5.0%, the N- dimethyl pyrrolidones of positive pole solid masses
Addition be the 50%~80% of positive pole solid masses, the positive pole solid masses is small particle porous spherical cobalt acid lithium, super
The quality sum of conductive black, CNT and Kynoar.
3. a kind of emergency starting ultra-high magnification lithium ion battery according to claim 1, it is characterised in that：Prepare negative pole
During slurry, the addition of cladded type Delanium is the 90.0%~97.0% of negative pole solid masses, superconductive carbon black
Addition be the 1.0%~5.0% of negative pole solid masses, the addition of butadiene-styrene rubber for negative pole solid masses 1.0%~
5.0%, the addition of sodium carboxymethylcellulose is the 1.0%~5.0% of negative pole solid masses, and the addition of deionized water is negative
1~2 times of pole solid masses, the negative pole solid masses is cladded type Delanium, superconductive carbon black, butadiene-styrene rubber and carboxylic first
The quality sum of base sodium cellulosate.
4. a kind of emergency starting ultra-high magnification lithium ion battery according to claim 1, it is characterised in that：Positive plate
Two-sided deposited charge level density is 110g/m2~200g/m2, compacted density is 3.2g/m3~3.9g/m3；The two-sided deposited of the negative plate
Charge level density is 60g/m2~110g/m2, compacted density is 1.3g/m3~1.7g/m3。
5. a kind of emergency starting ultra-high magnification lithium ion battery according to claim 1, it is characterised in that：The barrier film
The polypropylene diaphragm of ceramics is coated with for surface.
6. a kind of emergency starting ultra-high magnification lithium ion battery according to claim 1, it is characterised in that：The barrier film
Porosity be 40%~60%.
7. a kind of emergency starting ultra-high magnification lithium ion battery according to claim 1, it is characterised in that：The electrolysis
Liquid is formed by lithium salts, solvent and additive mixed preparing, and the additive is by sulfuric acid vinyl ester, sulfuric acid glycol ester and sub- second
The mixed type additive of at least two compositions in base sulfuric ester, the quality of the additive accounts for the 0.5% of electrolyte gross mass
~5.0%.
8. a kind of emergency starting ultra-high magnification lithium ion battery according to claim 7, it is characterised in that：The lithium salts
It is lithium hexafluoro phosphate, the solvent is the mixed liquor of ethylene carbonate, dimethyl carbonate and diethyl carbonate.
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| CN108598556A (en) * | 2018-05-21 | 2018-09-28 | 重庆市紫建电子有限公司 | A kind of high temperature modification polymer Li-ion battery and preparation method thereof |
| CN109638342A (en) * | 2018-12-19 | 2019-04-16 | 珠海光宇电池有限公司 | A kind of lithium ion battery that high temperature performance can combine |
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| CN110492105A (en) * | 2019-08-26 | 2019-11-22 | 东莞维科电池有限公司 | The anode pole piece of a kind of positive electrode and its preparation and obtained lithium ion battery |
| CN110828776A (en) * | 2019-10-18 | 2020-02-21 | 风帆有限责任公司 | Puncture-resistant low-temperature-resistant cylindrical lithium ion battery and preparation method thereof |
| CN111224067A (en) * | 2019-11-18 | 2020-06-02 | 淮北市锂动芯新能源科技有限公司 | Flexible package lithium ion battery with high temperature and rate performance and preparation method thereof |
| CN112054202A (en) * | 2020-09-10 | 2020-12-08 | 辽宁九夷锂能股份有限公司 | High-energy high-rate lithium battery positive electrode additive, preparation method thereof and positive plate containing positive electrode additive |
| CN113424353A (en) * | 2020-11-12 | 2021-09-21 | 宁德新能源科技有限公司 | Electrolyte, electrochemical device and electronic device |
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