CN107785553A - A kind of ternary material processing method with safe closed pore function - Google Patents
A kind of ternary material processing method with safe closed pore function Download PDFInfo
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- CN107785553A CN107785553A CN201711019680.1A CN201711019680A CN107785553A CN 107785553 A CN107785553 A CN 107785553A CN 201711019680 A CN201711019680 A CN 201711019680A CN 107785553 A CN107785553 A CN 107785553A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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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Abstract
The present invention relates to a kind of ternary material processing method with safe closed pore function.The invention belongs to technical field of lithium ion.A kind of ternary material processing method with safe closed pore function, including following technical process：Step 1, form ternary material slurry：High molecular polymerization precursor emulsion is well mixed with conductive black, is then mixed with ternary material, slurry is formed by scattered；Step 2, dry, crush：Slurry drying removes moisture removal；Pulverize and sieve, obtain by the ternary material of high molecular polymer/carbon parcel；Step 3, the ternary material coated is made：2 10 DEG C carry out heat treatment 15 hours under polymer soft heat point, take out cooling, by crushing, sieving, obtaining the ternary material coated.The present invention is simple with technique, easy to process, can effectively improve the security performance of lithium-ion battery system, can make the advantages that ternary cell safety is by acupuncture, extruding destructive testing.
Description
Technical field
The invention belongs to technical field of lithium ion, more particularly to a kind of ternary material with safe closed pore function
Processing method.
Background technology
At present, lithium ion battery in fields such as electric car, energy-accumulating power stations into main flow battery.Wherein, ternary material
Do that the lithium ion battery of positive pole is very higher than energy, be the preferred power source of electric car.But due to ternary battery security
Difference, easy catching fire, is only used for small passenger car and logistic car, and the serious producer that limits is applied to Large Electric automobile.
The security of ternary material is poor, is primarily due to ternary material easily in overcharge, the easy deoxidation of positive electrode.
The oxygen atom of abjection further reacts with electrolyte etc. at high temperature, causes the burning and blast of battery system.In order to incite somebody to action
Ternary material is isolated with electrolyte, and many scholars are attempted.For example, using carbon coating, alumina-coated, magnesia
The technologies such as cladding, polyaniline, danger can be weakened to a certain extent, but effect is limited.For example, currently manufactured 18650
Ternary battery, it can not all pass through pin prick test and squeeze test substantially.
In order to improve the security of ternary material, many technologies are all being attempted, such as ceramic diaphragm technology, flame-retardant electrolyte
Technology, Ionic liquids technologies etc..But above technology is all not enough to be fully solved the safety issue of ternary material battery system.
Meanwhile above-mentioned technology needs also exist for transforming existing equipment, the technical problem such as larger is invested.
The content of the invention
The present invention provides a kind of ternary with safe closed pore function to solve technical problem present in known technology
Material processing method.
It is simple with technique it is an object of the invention to provide one kind, it is easy to process, lithium-ion battery system can be effectively improved
Security performance, can make ternary cell safety by acupuncture, extruding destructive testing the features such as there is safe closed pore function
Ternary material processing method.
The present invention technically, handles ternary material, does not change existing battery manufacture system, achieve peace
Quan Hua, it is most convenient efficiently processing method.
The present invention high molecular polymerization precursor emulsion is well mixed with conductive black first, then by routine ternary material and
Mixing, form slurry by the way that high speed is scattered.Slurry removes moisture removal by drying.After pulverizing and sieving, obtain by high molecular polymerization
The ternary material of thing/carbon parcel.The material is carried out being heat-treated 1-5 hours for 2-10 DEG C under polymer soft heat point, taken out cold
But, by crushing, sieving, obtaining the ternary material coated.
Wherein, high molecular polymerization precursor emulsion is polyethylene emulsion, polypropylene emulsion, ptfe emulsion etc..In finished product
Middle high molecular polymerization precursor emulsion dry matter weight ratio is 0.05-1%.Conductive black is electrically conductive graphite powder, acetylene black, graphene
Deng.Part by weight is 0.05-1% in finished product.
High molecular polymer emulsion solid content is generally 5-60% (part by weight).In above-mentioned slurry, moisture content ratio is general
For 10-60% (part by weight), slurry viscosity 1000-10000mPa.s.
The present invention concrete principle be：In the superficial layer of the floor height molecule of ternary material Surface coating one/carbon black composition.The table
Surface layer has conductive and porous, does not influence the transmission of lithium ion.The particularly addition of carbon black, overcome high polymer material and do not lead
The shortcomings that electric, there is larger effect to improving the high rate performance of battery, reducing internal resistance.When in high temperature thermal runaway occurs for battery,
The macromolecule on surface can melt, and cause tertiary cathode material surface to be coated completely, so as to be formed " closed pore ", isolation electrolysis
The reaction of liquid and positive electrode, so that cell reaction interrupts, substantially increase the security performance of battery system.
The ternary material processing method that the present invention has safe closed pore function is adopted the technical scheme that：
A kind of ternary material processing method with safe closed pore function, is characterized in：Three with safe closed pore function
First material processing method includes following technical process：
Step 1：Form ternary material slurry：High molecular polymerization precursor emulsion is well mixed with conductive black, then by three
First material is mixed with, and slurry is formed by scattered；
Step 2：Dry, crush：Slurry drying removes moisture removal；Pulverize and sieve, obtain by high molecular polymer/carbon parcel
Ternary material；
Step 3：The ternary material coated is made：Under polymer soft heat point 2-10 DEG C carry out be heat-treated 1-5 it is small
When, cooling is taken out, by crushing, sieving, obtaining the ternary material coated.
The ternary material processing method that the present invention has safe closed pore function can also adopt the following technical scheme that：
The described ternary material processing method with safe closed pore function, is characterized in：High molecular polymerization precursor emulsion is
Polyethylene emulsion, polypropylene emulsion or ptfe emulsion；The high molecular polymerization precursor emulsion dry matter weight ratio in finished product
For 0.05-1%.
The described ternary material processing method with safe closed pore function, is characterized in：High molecular polymerization precursor emulsion is consolidated
The part by weight of content is 5-60%.
The described ternary material processing method with safe closed pore function, is characterized in：Conductive black is electrically conductive graphite
Powder, acetylene black or graphene, part by weight is 0.05-1% in finished product.
The described ternary material processing method with safe closed pore function, is characterized in：Formed in ternary material slurry,
The part by weight of moisture is 10-60%, slurry viscosity 1000-10000mPa.s.
The present invention has the advantages and positive effects of：
Ternary material processing method with safe closed pore function is as a result of the brand-new technical scheme of the present invention, with showing
There is technology to compare, the present invention effectively increases the security performance of lithium-ion battery system by the modification to tertiary cathode material.
Ternary cell safety can be made to pass through the destructive testings such as acupuncture, extruding.
Brief description of the drawings
Fig. 1 is tertiary cathode material SEM photograph prepared by the present invention.
Embodiment
In order to further understand the content, features and effects of the present invention, hereby enumerating following examples, and coordinate accompanying drawing
Describe in detail as follows：
Refering to accompanying drawing 1.
Embodiment 1
A kind of ternary material processing method with safe closed pore function, including following technical process：
Step 1：Form ternary material slurry：2g polyethylene emulsions (solid content 50wt%) and 1g electrically conductive graphite powders are mixed
Close, then add 249g pure water, add 98g 523 type ternary material (LiNi0.5Co0.2Mn0.3O2), it is scattered by high speed
Form mixed uniformly slurry.Now viscosity is 5000mPa.s.
Step 2：Dry, crush：By slurry in an oven, 120 DEG C of drying 6h, remove moisture removal.After pulverizing and sieving, obtain
By the ternary material of high molecular polymer/carbon parcel.
Step 3：The ternary material coated is made：The material is subjected to hot place at 90 DEG C (92 DEG C of polyethylene soft fusing point)
Reason 5 hours, cooling is taken out, by crushing, sieving, obtaining the ternary material coated.Wherein, polyethylene, electrically conductive graphite powder exist
Part by weight is respectively 1% in finished product.
Accompanying drawing 1 is the tertiary cathode material SEM photograph manufactured with the present embodiment technology.
The cladding ternary material manufactured with the technology manufactures lithium ion battery, when carrying out acupuncture experiment, does not burn, not quick-fried
It is fried, it is missing of ignition, there is fabulous security.
Embodiment 2
A kind of ternary material processing method with safe closed pore function, including following technical process：
Step 1：Form ternary material slurry：5Kg polypropylene emulsions (solid content 5wt%) and 1Kg acetylene blacks are mixed first
Close, then add 222.667Kg pure water, add 1998Kg 622 type ternary material (LiNi0.6Co0.2Mn0.2O2), pass through
It is scattered at a high speed to form mixed uniformly slurry (wherein water content is 10%).Now viscosity is 1000mPa.s.
Step 2：Dry, crush：By slurry in an oven, 115 DEG C of drying 4h, remove moisture removal.After pulverizing and sieving, obtain
By the ternary material of high molecular polymer/carbon parcel.
Step 3：The ternary material coated is made：The material is subjected to heat at 140 DEG C (150 DEG C of polypropylene soft fusing point)
Processing 5 hours, cooling is taken out, by crushing, sieving, obtaining the ternary material coated.Wherein, polypropylene, acetylene black into
Part by weight is respectively 0.05% in product.
The cladding ternary material manufactured with the technology manufactures lithium ion battery, when carrying out extrusion experiment, does not burn, not quick-fried
It is fried, it is missing of ignition, there is fabulous security.
Embodiment 3
A kind of ternary material processing method with safe closed pore function, including following technical process：
Step 1：Form ternary material slurry：First by 100g ptfe emulsions (solid content 40wt%) and 200g
Solid graphite alkene powder mixes, and then adds 3940g pure water, adds 3760g 811 type ternary materials
(LiNi0.8Co0.1Mn0.1O2), form mixed uniformly slurry by the way that high speed is scattered (wherein water content is 50%).Now glue
Spend for 3500mPa.s.
Step 2：Dry, crush：By slurry in an oven, 110 DEG C of drying 5h, remove moisture removal.After pulverizing and sieving, obtain
By the ternary material of high molecular polymer polytetrafluoroethylene (PTFE)/carbon parcel.
Step 3：The ternary material coated is made：The material is entered at 255 DEG C (260 DEG C of soft PTFE fusing points)
Row heat treatment 3 hours, takes out cooling, by crushing, sieving, obtaining the ternary material coated.Wherein, polytetrafluoroethylene (PTFE), stone
Black alkene part by weight in finished product is respectively 0.1%, 0.5%.
The cladding ternary material manufactured with the technology manufactures lithium ion battery, when carrying out acupuncture experiment, does not burn, not quick-fried
It is fried, it is missing of ignition, there is fabulous security.
The present embodiment has that described technique is simple, easy to process, can effectively improve the security of lithium-ion battery system
Can, ternary cell safety can be made to pass through the good effects such as acupuncture, extruding destructive testing.
Claims (5)
1. a kind of ternary material processing method with safe closed pore function, it is characterized in that：Ternary with safe closed pore function
Material processing method includes following technical process：
Step 1, form ternary material slurry：High molecular polymerization precursor emulsion is well mixed with conductive black, then by ternary material
Material is mixed with, and slurry is formed by scattered；
Step 2, dry, crush：Slurry drying removes moisture removal；Pulverize and sieve, obtain by the three of high molecular polymer/carbon parcel
First material；
Step 3, the ternary material coated is made：2-10 DEG C carries out being heat-treated 1-5 hours under polymer soft heat point, takes
Go out cooling, by crushing, sieving, obtaining the ternary material coated.
2. the ternary material processing method according to claim 1 with safe closed pore function, it is characterized in that：Polyphosphazene polymer
Fit emulsion is polyethylene emulsion, polypropylene emulsion or ptfe emulsion；The high molecular polymerization precursor emulsion dry in finished product
Matter part by weight is 0.05-1%.
3. the ternary material processing method according to claim 2 with safe closed pore function, it is characterized in that：Polyphosphazene polymer
The part by weight of fit emulsion solid content is 5-60%.
4. the ternary material processing method according to claim 1 with safe closed pore function, it is characterized in that：Conductive black
For electrically conductive graphite powder, acetylene black or graphene, part by weight is 0.05-1% in finished product.
5. the ternary material processing method with safe closed pore function according to claim 1,2,3 or 4, it is characterized in that：
Formed in ternary material slurry, the part by weight of moisture is 10-60%, slurry viscosity 1000-10000mPa.s.
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Cited By (1)
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| CN114921146A (en) * | 2022-06-24 | 2022-08-19 | 江苏凯伦建材股份有限公司 | Light polymer cement waterproof coating and preparation method thereof |
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