CN106981681A - A kind of long circulating moderate multiplying factor ternary system power lithium-ion battery and preparation method - Google Patents
A kind of long circulating moderate multiplying factor ternary system power lithium-ion battery and preparation method Download PDFInfo
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- CN106981681A CN106981681A CN201710222069.2A CN201710222069A CN106981681A CN 106981681 A CN106981681 A CN 106981681A CN 201710222069 A CN201710222069 A CN 201710222069A CN 106981681 A CN106981681 A CN 106981681A
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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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention discloses a kind of long circulating moderate multiplying factor ternary system power lithium-ion battery and preparation method, comprises the following steps：The ternary system anode material of coating nano carbon layer, electrically conductive graphite, binding agent PVDF, organic solvent NMP ECDCs are starched, are coated on aluminium collector and are fabricated to positive plate by A, ternary system anode material Surface coating nano-carbon layer；B, is compounded with the artificial plumbago negative pole material of porous nano graphite flake, is starched with conductive black, binding agent SBR, dispersing agent C MC ECDCs, is coated on copper current collector and is fabricated to negative plate；C, will toast after positive/negative plate, diaphragm paper winding after roll-in, injects rate electrolyte；After D, battery seal, after specific activation and aging technique, ternary system power lithium-ion battery is fabricated to.By preparation method of the present invention, the ternary system power lithium-ion battery of preparation has long circulation life, medium high rate performance and excellent cryogenic property.
Description
Technical field
The present invention relates to a kind of lithium ion battery, specifically a kind of long circulating moderate multiplying factor ternary system power lithium-ion battery and system
Preparation Method.
Background technology
At present, lithium rechargeable battery has been widely used in 3C industries, and the daily life given people brings pole
Big facility.Lithium rechargeable battery is occupied mutually with the excellent chemical property such as energy density is big, voltage is high, self discharge is small
Most of market share of networking mobile terminal product, such as notebook computer, tablet personal computer, smart mobile phone.With lithium ion
Battery is used electric automobiles are substantial amounts of, and the requirement to battery performance is different, and battery needs higher energy density
And power density, longer cycle life, excellent low temperature performance, can large current charge etc..Ternary system lithium ion power
Battery has obvious advantage, particularly on the electric vehicles such as electric bicycle, electric automobile, electronic bus, it is desirable in traveling
Journey is long, and charging rate is fast, and temperature in use scope is wide etc..
In lithium ion battery material system, ternary system anode material gram volume has an obvious advantage, but cycle life and
The lithium iron phosphate positive material largely used has a certain distance；Ternary system power lithium-ion battery is in performance design simultaneously
When, the lifting of energy density, power density can decrease, and the cryogenic property of battery can decline, and make ternary system lithium ion power
The use of battery has been limited.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of long circulating moderate multiplying factor ternary system power
Lithium ion battery and preparation method, it is intended to solve existing ternary system power lithium-ion battery cycle life, power density and low temperature
The method of performance, meets the actual demand of electric vehicle.
Technical scheme is as follows：
A, ternary system anode material Surface coating nano-carbon layer, by coating nano carbon layer ternary system anode material, electrically conductive graphite,
Binding agent PVDF（Kynoar）, organic solvent NMP（1-METHYLPYRROLIDONE）ECDC is starched, and is coated on aluminium collector and is made
Into positive plate；
B, is compounded with the artificial plumbago negative pole material of porous nano graphite flake, with conductive black, binding agent SBR（Butadiene-styrene rubber breast
Liquid）, dispersing agent C MC（Sodium carboxymethylcellulose）ECDC is starched, and is coated on copper current collector and is fabricated to negative plate；
C, will toast after positive/negative plate, diaphragm paper winding after roll-in, injects rate electrolyte;
After D, battery seal, after specific activation and aging technique, ternary system power lithium-ion battery is fabricated to.
A kind of above-described long circulating moderate multiplying factor ternary system power lithium-ion battery and preparation method, wherein, step A
In, the ternary system anode material Surface coating nano-carbon layer is made in accordance with the following steps：1st, the phenolic resin of 200 mesh will be crossed
Micro mist, is dissolved in organic solvent NMP;2nd, ternary system anode material is added in step 1 resulting solution and be stirred, stirred
3 ~ 5h of time;3rd, the slurry being stirred is dried with spray dryer；4th, the material of drying is heat-treated 2 ~ 4h at 500 DEG C ~ 700 DEG C
, obtain the ternary system anode material of Surface coating nano-carbon layer.Ternary system anode material described in above-mentioned steps, including but not
It is confined to：111 type nickle cobalt lithium manganates, 523 type nickle cobalt lithium manganates, 622 type nickle cobalt lithium manganates, 811 type nickle cobalt lithium manganates or nickel cobalt
Lithium aluminate NCA etc..
A kind of above-described long circulating moderate multiplying factor ternary system power lithium-ion battery and preparation method, wherein, step B
In, the artificial plumbago negative pole material for being compounded with porous nano graphite flake is made in accordance with the following steps：1st, by soluble phenolics
Urea formaldehyde, surfactant are dissolved in organic solvent ethanol by certain mol ratio, stirring to clear solution；2, by artificial stone
Ink powder is added in step 1 resulting solution and is stirred, and polyase 13 ~ 12h is stirred at 70 DEG C by reactor, then in vacuum
100 DEG C of drying in drying machine;3rd, nitrogen protection is warming up to 500 DEG C ~ 800 DEG C constant temperature with 1 DEG C/min in the material tunnel cave of drying
2 ~ 6h is heated, obtains being compounded with the artificial plumbago negative pole material of porous nano graphite flake.Delanium described in above-mentioned steps
Negative material, including but not limited to：Graphitized carbon microballoon, needle coke class Delanium, pitch coke class Delanium, graphitization
Carbon fiber etc..
A kind of above-described long circulating moderate multiplying factor ternary system power lithium-ion battery and preparation method, wherein, step C
In, the rate lithium ion battery electrolyte, composition is：DMC（Dimethyl carbonate）40 ~ 50 parts, EC（Ethylene carbonate）20
~ 30 parts, EMC（Methyl ethyl carbonate）10 ~ 20 parts, PC（Propene carbonate）2 ~ 5 parts, 1 ~ 2 part of VC vinylene carbonates, PS sulfurous acid
1 ~ 3 part of propylene, 1 ~ 3 part of BP (biphenyl), LiPF6（Lithium hexafluoro phosphate）15 ~ 18 parts；Electrical conductivity（25℃）For 12.30 ±
0.50mS/cm, density（20℃）For 1.19 ± 0.03g/ml.
A kind of above-described long circulating moderate multiplying factor ternary system power lithium-ion battery and preparation method, wherein, step C
In, the specific activation and aging technique comprise the following steps：1, battery is quiet at a temperature of 45 ~ 55 DEG C after fluid injection sealing
Put 48 ~ 72h;2nd, battery charges to 3.4 ~ 3.6V, constant-voltage charge 2h by 0.05C respectively;3rd, battery is in 45 ~ 55 DEG C of temperature
It is lower to stand 5 ~ 7 days；4th, battery charges to 4.2V by 0.3C, and 1C electric discharges carry out capacity sorting.
A kind of long circulating moderate multiplying factor ternary system power lithium-ion battery of the present invention, is made of above-mentioned step.
By the preparation method of the present invention, obtained ternary system power lithium-ion battery has more than 1000 times cycle lives（Using 1C
Charge 5C discharge tests）, the ability of more than 10C multiplying power dischargings, the ability of -20 DEG C of 1C of low temperature electric discharges.
Embodiment
The present invention provides a kind of long circulating moderate multiplying factor ternary system power lithium-ion battery and preparation method, to make the present invention's
Purpose, technical scheme and effect are clearer, clear and definite, the solution of the present invention are further described, it will be appreciated that this place
The specific embodiment of description only to explain the present invention, is not intended to limit the invention.
Embodiment 1：
The phenolic resin micro mist 10g of 200 mesh is weighed, stirring and dissolving is in 300gNMP, and stirring 2h obtains solution.Added in solution
300g111 type nickle cobalt lithium manganates are stirred, mixing time 3h, the slurry being stirred 160 DEG C of drying of spray dryer, are dried
600 DEG C of heated at constant temperature 4h are warming up to 2 DEG C/min in dry material tunnel cave, the type nickel cobalt of Surface coating nano-carbon layer 111 is made
LiMn2O4 ternary system anode material.By positive electrode:Electrically conductive graphite:PVDF:NMP weight ratio is 50:2 :1.5:45, through with
Material closes slurry, is coated on 16 micron aluminum foils, roll-in to the g/cm3 of volume density 3.4 is fabricated to positive plate.Weigh soluble phenolic aldehyde tree
Fat 10g, surfactant (PEO-PPOX-polyethylene oxide block copolymer F127) 3g are dissolved in ethanol
In, stirring to clear solution.500g artificial plumbago negative pole powder is added in solution to be stirred, and is polymerize by 70 DEG C of stirrings of reactor
5 h, then nitrogen protection is warming up to 800 with 1 DEG C/min in 100 DEG C of drying, the material tunnel cave of drying in vacuum drier
DEG C heated at constant temperature 5h, obtains being compounded with the artificial plumbago negative pole material of porous nano graphite flake.By negative material:Conductive black:
SBR:CMC:Water weight ratio is 100:2:1.5:120, close and starch through dispensing, be coated on 9 micron copper foils, roll-in to volume density
1.55 g/cm3 are fabricated to negative plate.Will positive/negative plate, diaphragm paper winding after toast, inject rate electrolyte, electrolyte into
Point：DMC:EC:EMC:LiPF6:BP:VC:PS:PC is 45:21:11:17:2:1:1:2, then battery sealed, by battery
72h is stood in 55 DEG C of temperature, 3.5V, constant-voltage charge 2h are charged to by 0.05C, then battery stands 7 days in 45 DEG C of temperature,
4.2V is charged to by 0.3C again, 1C electric discharges carry out partial volume.Battery carries out performance test after partial volume, and battery is put using 1C chargings 5C
Electricity carries out cycle life test, 1000 circulation volume conservation rates 89%, 10C multiplying power dischargings capability retention 96%（1C electric discharges are held
Measure as 100%）, -20 DEG C of 1C discharge capacitances 90% of low temperature（1C normal temperature discharge capacity is 100%）.
Embodiment 2：
The phenolic resin micro mist 8g of 200 mesh is weighed, stirring and dissolving is in 300gNMP, and stirring 2h obtains solution.Added in solution
300g111 type nickle cobalt lithium manganates are stirred, mixing time 3h, the slurry being stirred 160 DEG C of drying of spray dryer, are dried
700 DEG C of heated at constant temperature 4h are warming up to 2 DEG C/min in dry material tunnel cave, the type nickel cobalt of Surface coating nano-carbon layer 111 is made
LiMn2O4 ternary system anode material.By positive electrode:Electrically conductive graphite:PVDF:NMP weight ratio is 50:2 :1.5:45, through with
Material closes slurry, is coated on 16 micron aluminum foils, roll-in to the g/cm3 of volume density 3.4 is fabricated to positive plate.Weigh soluble phenolic aldehyde tree
Fat 8g, surfactant (PEO-PPOX-polyethylene oxide block copolymer F127) 3g are dissolved in ethanol
In, stirring to clear solution.500g artificial plumbago negative pole powder is added in solution to be stirred, and is polymerize by 70 DEG C of stirrings of reactor
5 h, then nitrogen protection is warming up to 800 with 1 DEG C/min in 100 DEG C of drying, the material tunnel cave of drying in vacuum drier
DEG C heated at constant temperature 4h, obtains being compounded with the artificial plumbago negative pole material of porous nano graphite flake.By negative material:Conductive black:
SBR:CMC:Water weight ratio is 100:2:1.5:120, close and starch through dispensing, be coated on 9 micron copper foils, roll-in to volume density
1.55 g/cm3 are fabricated to negative plate.Will positive/negative plate, diaphragm paper winding after toast, inject rate electrolyte, electrolyte into
Point：DMC:EC:EMC:LiPF6:BP:VC:PS:PC is 45:21:11:17:2:1:1:2, then battery sealed, by battery
72h is stood in 55 DEG C of temperature, 3.5V, constant-voltage charge 2h are charged to by 0.05C, then battery stands 7 days in 45 DEG C of temperature,
4.2V is charged to by 0.3C again, 1C electric discharges carry out partial volume.Battery carries out performance test after partial volume, and battery is put using 1C chargings 5C
Electricity carries out cycle life test, 1000 circulation volume conservation rates 87%, 10C multiplying power dischargings capability retention 94%（1C electric discharges are held
Measure as 100%）, -20 DEG C of 1C discharge capacitances 88% of low temperature（1C normal temperature discharge capacity is 100%）.
Embodiment 3：
The phenolic resin micro mist 10g of 200 mesh is weighed, stirring and dissolving is in 300gNMP, and stirring 2h obtains solution.Added in solution
300g523 type nickle cobalt lithium manganates are stirred, mixing time 3h, the slurry being stirred 160 DEG C of drying of spray dryer, are dried
700 DEG C of heated at constant temperature 4h are warming up to 2 DEG C/min in dry material tunnel cave, the type nickel cobalt of Surface coating nano-carbon layer 523 is made
LiMn2O4 ternary system anode material.By positive electrode:Electrically conductive graphite:PVDF:NMP weight ratio is 50:2 :1.5:45, through with
Material closes slurry, is coated on 16 micron aluminum foils, roll-in to the g/cm3 of volume density 3.3 is fabricated to positive plate.Weigh soluble phenolic aldehyde tree
Fat 10g, surfactant (PEO-PPOX-polyethylene oxide block copolymer F127) 3g are dissolved in ethanol
In, stirring to clear solution.500g artificial plumbago negative pole powder is added in solution to be stirred, and is polymerize by 70 DEG C of stirrings of reactor
5 h, then nitrogen protection is warming up to 800 with 1 DEG C/min in 100 DEG C of drying, the material tunnel cave of drying in vacuum drier
DEG C heated at constant temperature 5h, obtains being compounded with the artificial plumbago negative pole material of porous nano graphite flake.By negative material:Conductive black:
SBR:CMC:Water weight ratio is 100:2:1.5:120, close and starch through dispensing, be coated on 9 micron copper foils, roll-in to volume density
1.55 g/cm3 are fabricated to negative plate.Will positive/negative plate, diaphragm paper winding after toast, inject rate electrolyte, electrolyte into
Point：DMC:EC:EMC:LiPF6:BP:VC:PS:PC is 45:21:11:17:2:1:1:2, then battery sealed, by battery
72h is stood in 55 DEG C of temperature, 3.5V, constant-voltage charge 2h are charged to by 0.05C, then battery stands 7 days in 45 DEG C of temperature,
4.2V is charged to by 0.3C again, 1C electric discharges carry out partial volume.Battery carries out performance test after partial volume, and battery is put using 1C chargings 5C
Electricity carries out cycle life test, 1000 circulation volume conservation rates 85%, 10C multiplying power dischargings capability retention 93%（1C electric discharges are held
Measure as 100%）, -20 DEG C of 1C discharge capacitances 87% of low temperature（1C normal temperature discharge capacity is 100%）.
Embodiment 4：
The phenolic resin micro mist 8g of 200 mesh is weighed, stirring and dissolving is in 300gNMP, and stirring 2h obtains solution.Added in solution
300g523 type nickle cobalt lithium manganates are stirred, mixing time 3h, the slurry being stirred 160 DEG C of drying of spray dryer, are dried
600 DEG C of heated at constant temperature 4h are warming up to 2 DEG C/min in dry material tunnel cave, the type nickel cobalt of Surface coating nano-carbon layer 523 is made
LiMn2O4 ternary system anode material.By positive electrode:Electrically conductive graphite:PVDF:NMP weight ratio is 50:2 :1.5:45, through with
Material closes slurry, is coated on 16 micron aluminum foils, roll-in to the g/cm3 of volume density 3.3 is fabricated to positive plate.Weigh soluble phenolic aldehyde tree
Fat 8g, surfactant (PEO-PPOX-polyethylene oxide block copolymer F127) 3g are dissolved in ethanol
In, stirring to clear solution.500g artificial plumbago negative pole powder is added in solution to be stirred, and is polymerize by 70 DEG C of stirrings of reactor
5 h, then nitrogen protection is warming up to 700 with 1 DEG C/min in 100 DEG C of drying, the material tunnel cave of drying in vacuum drier
DEG C heated at constant temperature 5h, obtains being compounded with the artificial plumbago negative pole material of porous nano graphite flake.By negative material:Conductive black:
SBR:CMC:Water weight ratio is 100:2:1.5:120, close and starch through dispensing, be coated on 9 micron copper foils, roll-in to volume density
1.55 g/cm3 are fabricated to negative plate.Will positive/negative plate, diaphragm paper winding after toast, inject rate electrolyte, electrolyte into
Point：DMC:EC:EMC:LiPF6:BP:VC:PS:PC is 45:21:11:17:2:1:1:2, then battery sealed, by battery
72h is stood in 55 DEG C of temperature, 3.5V, constant-voltage charge 2h are charged to by 0.05C, then battery stands 7 days in 45 DEG C of temperature,
4.2V is charged to by 0.3C again, 1C electric discharges carry out partial volume.Battery carries out performance test after partial volume, and battery is put using 1C chargings 5C
Electricity carries out cycle life test, 1000 circulation volume conservation rates 86%, 10C multiplying power dischargings capability retention 93%（1C electric discharges are held
Measure as 100%）, -20 DEG C of 1C discharge capacitances 88% of low temperature（1C normal temperature discharge capacity is 100%）.
Embodiment 5：
The phenolic resin micro mist 10g of 200 mesh is weighed, stirring and dissolving is in 300gNMP, and stirring 2h obtains solution.Added in solution
300g622 type nickle cobalt lithium manganates are stirred, mixing time 3h, the slurry being stirred 160 DEG C of drying of spray dryer, are dried
600 DEG C of heated at constant temperature 4h are warming up to 2 DEG C/min in dry material tunnel cave, the type nickel cobalt of Surface coating nano-carbon layer 622 is made
LiMn2O4 ternary system anode material.By positive electrode:Electrically conductive graphite:PVDF:NMP weight ratio is 50:2 :1.5:45, through with
Material closes slurry, is coated on 16 micron aluminum foils, roll-in to the g/cm3 of volume density 3.3 is fabricated to positive plate.Weigh soluble phenolic aldehyde tree
Fat 10g, surfactant (PEO-PPOX-polyethylene oxide block copolymer F127) 3g are dissolved in ethanol
In, stirring to clear solution.500g artificial plumbago negative pole powder is added in solution to be stirred, and is polymerize by 70 DEG C of stirrings of reactor
5 h, then nitrogen protection is warming up to 800 with 1 DEG C/min in 100 DEG C of drying, the material tunnel cave of drying in vacuum drier
DEG C heated at constant temperature 5h, obtains being compounded with the artificial plumbago negative pole material of porous nano graphite flake.By negative material:Conductive black:
SBR:CMC:Water weight ratio is 100:2:1.5:120, close and starch through dispensing, be coated on 9 micron copper foils, roll-in to volume density
1.55 g/cm3 are fabricated to negative plate.Will positive/negative plate, diaphragm paper winding after toast, inject rate electrolyte, electrolyte into
Point：DMC:EC:EMC:LiPF6:BP:VC:PS:PC is 44:22:12:16:2:1:1:2, then battery sealed, by battery
72h is stood in 55 DEG C of temperature, 3.5V, constant-voltage charge 2h are charged to by 0.05C, then battery stands 7 days in 45 DEG C of temperature,
4.2V is charged to by 0.3C again, 1C electric discharges carry out partial volume.Battery carries out performance test after partial volume, and battery is put using 1C chargings 5C
Electricity carries out cycle life test, 1000 circulation volume conservation rates 89%, 10C multiplying power dischargings capability retention 92%（1C electric discharges are held
Measure as 100%）, -20 DEG C of 1C discharge capacitances 83% of low temperature（1C normal temperature discharge capacity is 100%）.
Embodiment 6：
The phenolic resin micro mist 8g of 200 mesh is weighed, stirring and dissolving is in 300gNMP, and stirring 2h obtains solution.Added in solution
300g622 type nickle cobalt lithium manganates are stirred, mixing time 3h, the slurry being stirred 160 DEG C of drying of spray dryer, are dried
600 DEG C of heated at constant temperature 4h are warming up to 2 DEG C/min in dry material tunnel cave, the type nickel cobalt of Surface coating nano-carbon layer 622 is made
LiMn2O4 ternary system anode material.By positive electrode:Electrically conductive graphite:PVDF:NMP weight ratio is 50:2 :1.5:45, through with
Material closes slurry, is coated on 16 micron aluminum foils, roll-in to volume density 3.4g/cm3 is fabricated to positive plate.Weigh resol resin
8g, surfactant (PEO-PPOX-polyethylene oxide block copolymer F127) 3g are dissolved in ethanol,
Stir to clear solution.500g artificial plumbago negative pole powder is added in solution to be stirred, and passes through 70 DEG C of 5 h of stirring polymerization of reactor
, then nitrogen protection is warming up to 800 DEG C of perseverances with 1 DEG C/min in 100 DEG C of drying, the material tunnel cave of drying in vacuum drier
Temperature heating 5h, obtains being compounded with the artificial plumbago negative pole material of porous nano graphite flake.By negative material:Conductive black:SBR:
CMC:Water weight ratio is 100:2:1.5:120, close and starch through dispensing, be coated on 9 micron copper foils, roll-in to volume density 1.55
G/cm3 is fabricated to negative plate.It will be toasted after positive/negative plate, diaphragm paper winding, inject rate electrolyte, bath composition：
DMC:EC:EMC:LiPF6:BP:VC:PS:PC is 44:22:12:16:2:1:1:2, then battery sealed, battery is existed
55 DEG C of temperature stand 72h, and 3.5V, constant-voltage charge 2h are charged to by 0.05C, and then battery stands 7 days in 45 DEG C of temperature, then
4.2V is charged to by 0.3C, 1C electric discharges carry out partial volume.Battery carries out performance test after partial volume, and battery is using 1C charging 5C electric discharges
Carry out cycle life test, 1000 circulation volume conservation rates 88%, 10C multiplying power dischargings capability retention 93%（1C discharge capacities
For 100%）, -20 DEG C of 1C discharge capacitances 82% of low temperature（1C normal temperature discharge capacity is 100%）.
Embodiment 7：
The phenolic resin micro mist 10g of 200 mesh is weighed, stirring and dissolving is in 300gNMP, and stirring 2h obtains solution.Added in solution
300g nickel cobalt lithium aluminates NCA is stirred, mixing time 3h, the slurry being stirred 160 DEG C of drying of spray dryer, drying
Material tunnel cave in 500 DEG C of heated at constant temperature 4h are warming up to 2 DEG C/min, Surface coating nano-carbon layer nickel cobalt lithium aluminate is made
NCA ternary system anode materials.By positive electrode:Electrically conductive graphite:PVDF:NMP weight ratio is 50:2 :1.5:45, through dispensing
Slurry is closed, is coated on 16 micron aluminum foils, roll-in to the g/cm3 of volume density 3.2 is fabricated to positive plate.Weigh resol resin
9g, surfactant (PEO-PPOX-polyethylene oxide block copolymer F127) 3g are dissolved in ethanol,
Stir to clear solution.500g artificial plumbago negative pole powder is added in solution to be stirred, and passes through 70 DEG C of 5 h of stirring polymerization of reactor
, then nitrogen protection is warming up to 800 DEG C of perseverances with 1 DEG C/min in 100 DEG C of drying, the material tunnel cave of drying in vacuum drier
Temperature heating 5h, obtains being compounded with the artificial plumbago negative pole material of porous nano graphite flake.By negative material:Conductive black:SBR:
CMC:Water weight ratio is 100:2:1.5:120, close and starch through dispensing, be coated on 9 micron copper foils, roll-in to volume density 1.55
G/cm3 is fabricated to negative plate.It will be toasted after positive/negative plate, diaphragm paper winding, inject rate electrolyte, bath composition：
DMC:EC:EMC:LiPF6:BP:VC:PS:PC is 44:21:12:17.5:2:1.5:1:1, then battery sealed, by electricity
Pond stands 72h in 55 DEG C of temperature, and 3.5V, constant-voltage charge 2h are charged to by 0.05C, and then battery stands 7 in 45 DEG C of temperature
My god, then 4.2V is charged to by 0.3C, 1C electric discharges carry out partial volume.Battery carries out performance test after partial volume, and battery is charged using 1C
5C electric discharges carry out cycle life test, 1000 circulation volume conservation rates 81%, 10C multiplying power dischargings capability retention 90%（1C is put
Capacitance is 100%）, -20 DEG C of 1C discharge capacitances 82% of low temperature（1C normal temperature discharge capacity is 100%）.
Embodiment 8：
The phenolic resin micro mist 12g of 200 mesh is weighed, stirring and dissolving is in 300gNMP, and stirring 2h obtains solution.Added in solution
300g nickel cobalt lithium aluminates NCA is stirred, mixing time 3h, the slurry being stirred 160 DEG C of drying of spray dryer, drying
Material tunnel cave in 500 DEG C of heated at constant temperature 4h are warming up to 2 DEG C/min, Surface coating nano-carbon layer nickel cobalt lithium aluminate is made
NCA ternary system anode materials.By positive electrode:Electrically conductive graphite:PVDF:NMP weight ratio is 50:2 :1.5:45, through dispensing
Slurry is closed, is coated on 16 micron aluminum foils, roll-in to the g/cm3 of volume density 3.2 is fabricated to positive plate.Weigh resol resin
8g, surfactant (PEO-PPOX-polyethylene oxide block copolymer F127) 3g are dissolved in ethanol,
Stir to clear solution.500g artificial plumbago negative pole powder is added in solution to be stirred, and passes through 70 DEG C of 5 h of stirring polymerization of reactor
, then nitrogen protection is warming up to 700 DEG C of perseverances with 1 DEG C/min in 100 DEG C of drying, the material tunnel cave of drying in vacuum drier
Temperature heating 5h, obtains being compounded with the artificial plumbago negative pole material of porous nano graphite flake.By negative material:Conductive black:SBR:
CMC:Water weight ratio is 100:2:1.5:120, close and starch through dispensing, be coated on 9 micron copper foils, roll-in to volume density 1.55
G/cm3 is fabricated to negative plate.It will be toasted after positive/negative plate, diaphragm paper winding, inject rate electrolyte, bath composition：
DMC:EC:EMC:LiPF6:BP:VC:PS:PC is 44:21:12:17.5:2:1.5:1:1, then battery sealed, by electricity
Pond stands 72h in 55 DEG C of temperature, and 3.5V, constant-voltage charge 2h are charged to by 0.05C, and then battery stands 7 in 45 DEG C of temperature
My god, then 4.2V is charged to by 0.3C, 1C electric discharges carry out partial volume.Battery carries out performance test after partial volume, and battery is charged using 1C
5C electric discharges carry out cycle life test, 1000 circulation volume conservation rates 80%, 10C multiplying power dischargings capability retention 91%（1C is put
Capacitance is 100%）, -20 DEG C of 1C discharge capacitances 81% of low temperature（1C normal temperature discharge capacity is 100%）.
To sum up, in this specific implementation, the long circulating moderate multiplying factor ternary system power lithium-ion battery of preparation have 1000 times with
Upper cycle life（Using 1C charging 5C discharge tests）, the ability of more than 10C multiplying power dischargings, the ability of -20 DEG C of 1C of low temperature electric discharges,
The demand of electric vehicle actual condition can be met.
Above content is to combine specific preferred embodiment further details of explanation made for the present invention, it is impossible to recognized
The specific implementation of the fixed present invention is confined to these explanations.For those skilled in the art, not
Some replacements or substantially deformation, and performance or purposes are identical, should all be considered as category are made on the premise of departing from present inventive concept
In protection scope of the present invention.
Claims (5)
1. a kind of long circulating moderate multiplying factor ternary system power lithium-ion battery and preparation method, it is characterised in that comprise the following steps：
A, ternary system anode material Surface coating nano-carbon layer, by the ternary system anode material, electrically conductive graphite, bonding of coating nano carbon layer
Agent PVDF（Kynoar）, organic solvent NMP（1-METHYLPYRROLIDONE）ECDC is starched, and is coated on aluminium collector and is fabricated to just
Pole piece；B, is compounded with the artificial plumbago negative pole material of porous nano graphite flake, with conductive black, binding agent SBR（Butadiene-styrene rubber breast
Liquid）, dispersing agent C MC（Sodium carboxymethylcellulose）ECDC is starched, and is coated on copper current collector and is fabricated to negative plate；C, by after roll-in just
Toasted after negative plate, diaphragm paper winding, inject rate electrolyte;After D, battery seal, through specific activation and aging technique
Afterwards, it is fabricated to ternary system power lithium-ion battery.
2. according to the method described in claim 1, it is characterised in that：In step A, the ternary system anode material Surface coating is received
Rice carbon-coating, is made in accordance with the following steps：1, the phenolic resin micro mist of 200 mesh will be crossed, be dissolved in organic solvent NMP;2, by three
Member is that positive electrode is added in step 1 resulting solution and is stirred, 3 ~ 5h of mixing time;3, the slurry spraying being stirred
Drying machine is dried；4, the material of drying is heat-treated 2 ~ 4h at 500 DEG C ~ 700 DEG C, obtains the ternary system of Surface coating nano-carbon layer
Positive electrode;Ternary system anode material described in above-mentioned steps, including but not limited to：111 type nickle cobalt lithium manganates, 523 types
Nickle cobalt lithium manganate, 622 type nickle cobalt lithium manganates, 811 type nickle cobalt lithium manganates or nickel cobalt lithium aluminate NCA etc..
3. according to the method described in claim 1, it is characterised in that：In step B, the people for being compounded with porous nano graphite flake
Graphite cathode material is made, is made in accordance with the following steps：1, resol resin, surfactant is molten by certain mol ratio
Solution is in organic solvent ethanol, stirring to clear solution；2, graphous graphite powder is added in step 1 resulting solution and stirred
Mix, polyase 13 ~ 12h is stirred at 70 DEG C by reactor, then 100 DEG C of drying in vacuum drier;3rd, the material of drying
Nitrogen protection is warming up to 500 DEG C ~ 800 DEG C 2 ~ 6h of heated at constant temperature with 1 DEG C/min in tunnel cave, obtains being compounded with porous nano graphite
The artificial plumbago negative pole material of piece；Artificial plumbago negative pole material described in above-mentioned steps, including but not limited to：Graphitized carbon
Microballoon, needle coke class Delanium, pitch coke class Delanium, graphitized carbon fibre etc..
4. according to the method described in claim 1, it is characterised in that：In step C, the rate lithium ion battery electrolyte,
Composition is：DMC（Dimethyl carbonate）40 ~ 50 parts, EC（Ethylene carbonate）20 ~ 30 parts, EMC（Methyl ethyl carbonate）10 ~ 20 parts, PC
（Propene carbonate）2 ~ 5 parts, 1 ~ 2 part of VC vinylene carbonates, 1 ~ 3 part of PS propylene sulfites, 1 ~ 3 part of BP (biphenyl),
LiPF6（Lithium hexafluoro phosphate）15 ~ 18 parts；Electrical conductivity（25℃）For 12.30 ± 0.50mS/cm, density（20℃）For 1.19 ±
0.03g/ml。
5. according to the method described in claim 1, it is characterised in that：In step D, the specific activation and aging technique, bag
Include following steps：1, battery stands 48 ~ 72h after fluid injection sealing at a temperature of 45 ~ 55 DEG C;2nd, battery passes through 0.05C respectively
Charge to 3.4 ~ 3.6V, constant-voltage charge 2h;3rd, battery stands 5 ~ 7 days at a temperature of 45 ~ 55 DEG C；4th, battery is charged by 0.3C
To 4.2V, 1C electric discharges carry out capacity sorting.
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| CN113178623A (en) * | 2021-05-18 | 2021-07-27 | 吴耀帮 | Low-temperature rate type power lithium ion battery and preparation method thereof |
| CN113889608A (en) * | 2021-09-27 | 2022-01-04 | 蜂巢能源科技有限公司 | Modified nickel-cobalt-manganese lithium aluminate anode material, preparation method thereof and lithium ion battery |
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| CN113178623A (en) * | 2021-05-18 | 2021-07-27 | 吴耀帮 | Low-temperature rate type power lithium ion battery and preparation method thereof |
| CN113178623B (en) * | 2021-05-18 | 2023-03-07 | 吴耀帮 | Low-temperature rate type power lithium ion battery and preparation method thereof |
| CN113889608A (en) * | 2021-09-27 | 2022-01-04 | 蜂巢能源科技有限公司 | Modified nickel-cobalt-manganese lithium aluminate anode material, preparation method thereof and lithium ion battery |
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