CN109950485A - A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery - Google Patents
A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery Download PDFInfo
- Publication number
- CN109950485A CN109950485A CN201910175139.2A CN201910175139A CN109950485A CN 109950485 A CN109950485 A CN 109950485A CN 201910175139 A CN201910175139 A CN 201910175139A CN 109950485 A CN109950485 A CN 109950485A
- Authority
- CN
- China
- Prior art keywords
- negative electrode
- kettle
- lithium ion
- silicon oxygen
- cmc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 title claims abstract description 68
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 53
- 239000011267 electrode slurry Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000007773 negative electrode material Substances 0.000 claims abstract description 38
- 239000006258 conductive agent Substances 0.000 claims abstract description 22
- 239000008367 deionised water Substances 0.000 claims abstract description 22
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 22
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- 239000011343 solid material Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims description 67
- 239000003292 glue Substances 0.000 claims description 66
- 239000002002 slurry Substances 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 19
- 239000000839 emulsion Substances 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 11
- QMGYPNKICQJHLN-UHFFFAOYSA-M Carboxymethylcellulose cellulose carboxymethyl ether Chemical compound [Na+].CC([O-])=O.OCC(O)C(O)C(O)C(O)C=O QMGYPNKICQJHLN-UHFFFAOYSA-M 0.000 claims description 7
- 230000002441 reversible effect Effects 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 229920000058 polyacrylate Polymers 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- OCKPCBLVNKHBMX-UHFFFAOYSA-N butylbenzene Chemical group CCCCC1=CC=CC=C1 OCKPCBLVNKHBMX-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000004034 viscosity adjusting agent Substances 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 2
- 239000006257 cathode slurry Substances 0.000 claims 1
- 238000002242 deionisation method Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910002804 graphite Inorganic materials 0.000 abstract description 4
- 239000010439 graphite Substances 0.000 abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- 239000010703 silicon Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 229920001296 polysiloxane Polymers 0.000 abstract description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 55
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 55
- 238000000034 method Methods 0.000 description 19
- 238000001816 cooling Methods 0.000 description 18
- 229920002125 Sokalan® Polymers 0.000 description 10
- 238000006467 substitution reaction Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 239000006210 lotion Substances 0.000 description 5
- 239000013543 active substance Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 3
- 239000011149 active material Substances 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 3
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000006183 anode active material Substances 0.000 description 2
- 239000006256 anode slurry Substances 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 238000009831 deintercalation Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007581 slurry coating method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000003836 solid-state method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion batteries, belong to lithium ion battery manufacture technology field.It includes deionized water and solid material, and solid material matches in parts by weight: 93-97 parts of silicon oxygen negative electrode active material, CMC1-2 parts, 1.2-2.0 times, 1-2 parts of conductive agent SP that binder is CMC, amounting to parts by weight is 100 parts.The silicon oxygen negative electrode active material for the use of accounting being 93-97 parts in the solid material of the negative electrode slurry is instead of traditional graphite etc., the silicon-based anode gram volume being prepared is much higher than graphite cathode, and adjustable silicone content substantially adjusts the gram volume of negative electrode active material, has many advantages, such as that later cycles are stable, first effect is higher.
Description
Technical field
The invention belongs to lithium ion battery manufacture technology fields, and in particular to arrive a kind of lithium ion battery silicon oxygen negative electrode slurry
And preparation method thereof, battery cathode and lithium ion battery.
Background technique
Negative electrode slurry is one of main part of lithium ion battery structure, and it is former that the quality of cell testing results depends on cathode
Expect the height of self-characteristic.The determination of negative electrode slurry also has very high standard to raw material itself, and the condition having is as follows:
(1) lithium ion moves back and forth during charging and discharging, will cause certain influence to volume, so should have stratiform or tunnel
Road structure, lithium ion do not have big variation in volume when insertion is with abjection；(2) lithium ion is to occur during deintercalation back and forth
The oxidation-reduction potential of redox reaction, chosen material will almost be approached with lithium ion；(3) deintercalation is a reversible mistake
The density of journey, high capacity has reversible high capacity, and material centainly has high invertibity；(4) subtracting with lithium ion content
Few, the lithium alloy of generation is less, and oxidation-reduction potential also can be with reducing as far as possible, and slowly battery has stable charge and discharge electricity
Pressure.
In the electrode production process of lithium ion battery, negative electrode slurry is by adhesive, conductive agent, active material, additive
Deng composition, the preparation of negative electrode slurry includes being mutually mixed, dissolving, dispersing between liquid and liquid, liquid and solid material
Etc. series of process process, and in this process all along with temperature, viscosity, environment etc. change.In negative electrode slurry,
The dispersibility and uniformity of granular active substance directly ring the movement to lithium ion in two interpolar of battery, therefore in lithium ion battery
The mixing dispersion of the slurry of each pole piece material is most important in production, and the quality of slurry dispersion quality directly influences subsequent lithium
The performance of the quality of ion battery production and products thereof.
In order to solve the above technical problems, through retrieving, Chinese Patent Application No. 201410046555.X, publication date 2015
The patent document on January 21, in, discloses a kind of preparation method of lithium ion battery anode slurry, including the following steps: 1) take
Sodium carboxymethylcellulose is added in deionized water, carries out vacuumize process after being dispersed with stirring, obtains glue A and glue liquid B；2) activity is taken
Material, conductive agent are mixed and stirred for obtaining powder mixture；3) prepared by slurry: take a part of powder mixture to be added in glue A,
After being dispersed with stirring, remaining powder mixture and glue liquid B is added, after being dispersed with stirring, adds adhesive and solvent, stirring point
Dissipate, filter to get.Preparation method of the invention prepares the CMC glue of two kinds of various concentrations, and first by active material and conduction
Agent is mixed and made into powder mixture, and active material is graphite powder, then carries out conjunction slurry, improves the consistency of slurry, but carbon dust
Compared with silicon oxygen negative electrode active material, due to the features such as silicon oxygen negative electrode active material partial size is small, large specific surface area, surface can be opposite
Greatly, sodium carboxymethylcellulose pyce is not easy absorption and is coated on silicon oxygen anode active material particles surface completely, in slurry preparation process
In be easy to appear the case where dispersion is uneven, and particle agglomeration settles, to keep negative electrode slurry stability and coating characteristics poor, into
And influence the service performance of lithium ion battery.
For another example Chinese Patent Application No. 201410393426.8, on 2 17th, 2016 patent documents of publication date, disclose
A kind of negative electrode slurry and preparation method thereof, negative electrode slurry includes each component of following mass parts: 1.5 parts of sodium carboxymethylcellulose~
2 parts, 3.5 parts~4 parts of polyalcohol, 96.5 parts~98.5 parts of deionized water, 1 part~1.5 parts of conductive agent, negative electrode active carbon material
95.5 parts~96.5 parts and 4.15 parts~4.5 parts of SBR emulsion adhesive, equally, but activated carbon and silicon oxygen cathode are living
Property substance compare, due to the features such as silicon oxygen negative electrode active material partial size is small, large specific surface area, surface can relatively large, Methyl cellulose
Plain sodium is not easy absorption and is coated on silicon oxygen anode active material particles surface completely, is easy to appear in slurry preparation process point
Dissipate uneven, the case where particle agglomeration settles, to keep negative electrode slurry stability and coating characteristics poor, and then influence lithium from
The service performance of sub- battery.
Summary of the invention
1. to solve the problems, such as
The small and large specific surface area for the grain diameter of silicon oxygen negative electrode active material in the prior art, therefore be not easy to disperse,
The problem for causing to prepare negative electrode slurry hardly possible, the present invention provide a kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, bear
Component in the slurry of pole is uniformly dispersed, and is not in sedimentation, guarantees that the performance of slurry meets lithium ion battery anode slurry
Use standard.
It is a further object of the present invention to provide a kind of battery cathode with above-mentioned lithium ion battery silicon oxygen negative electrode slurry with
Lithium ion battery, in charge and discharge process, pole piece current distribution is more uniform, so that silicon oxygen negative battery first charge discharge efficiency is higher, dissipates
Point is few, has good circulation, multiplying power and electrode kinetics performance.
2. technical solution
To solve the above-mentioned problems, the technical solution adopted in the present invention is as follows:
A kind of lithium ion battery silicon oxygen negative electrode slurry of the invention, including deionized water and solid material, solid material are pressed
Parts by weight proportion: 93-97 parts of silicon oxygen negative electrode active material, CMC1-2 parts, 1.2-2.0 times, the conductive agent SP that binder is CMC
1-2 parts, amounting to parts by weight is 100 parts.
In a kind of possible embodiment of the present invention, the partial size of the silicon oxygen negative electrode active material includes D10:5-8
Micron, D50:11-16 microns, D90≤30 micron, and the weight ratio of three is 1:(0.3-0.5): (0.1-0.2), specific surface
Product is 1.3-3.0m2/ g, tap density 0.9-1.2g/cm3。
In a kind of possible embodiment of the present invention, the binder is SBR emulsion SBR or polyacrylic acid
Lotion PAA or SBR emulsion SBR: polyacrylate emulsion PAA be 1:(1-2) mixture.
In a kind of possible embodiment of the present invention, the specific surface area of the conductive agent SP is 60 ± 5m2/ g, pH are
8-11。
In a kind of possible embodiment of the present invention, the binder is SBR emulsion SBR, pH 7-9, is glued
Degree is 50-200mPa.S.
It is 1:(0.3-0.5 according to the ratio of D10:D50:D90 in a kind of possible embodiment of the present invention): (0.1-
0.2), conversion is weight percentage as D10:58.82%-71.43%, D50:21.43%-29.41%, D90:7.14%-
The degree of substitution A=K*W (D10) of 11.77%, the CMC/(W (D50)+W (D90)), K value range here are 0.5-
Degree of substitution A:2.1 >=A >=0.9 of 1.2, preferred CMC.
Those skilled in the art is known, and silicon oxygen negative electrode active material is since partial size is small, the features such as large specific surface area, surface
Can be relatively large, it is easy to appear the case where dispersion is uneven, particle agglomeration settles in slurry preparation process, makes its negative electrode slurry system
Standby to become a big difficulty, the exactly appearance of the problem, so that the research and development of lithium ion battery can not be broken through, the present inventor is logical
A large amount of test and analysis are crossed, there are above-mentioned relationship, meters for the partial size and the degree of substitution A of CMC for obtaining silicon oxygen negative electrode active material
The degree of substitution A for obtaining CMC is calculated between 0.73-3.0, rate of dispersion is fast in slurry preparation process, and slurry density is uniform, point
Analysis the possible reason is, molecular weight is larger, the higher CMC of degree of substitution viscosity with higher, and CMC is in silicon oxygen negative electrode active material
The adsorbance of particle surface increases, and then forms an effective polymer network structure, makes silicon oxygen negative electrode active material
Grain is uniformly dispersed.
It is a further object of the present invention to provide a kind of preparation methods of lithium ion battery silicon oxygen negative electrode slurry, including following step
It is rapid:
1) prepare glue: appropriate amount of deionized water (40%-80% for accounting for stirred tank volume) is added in stirred tank, is being added
1.5-1.8% solid content CMC (solid content=CMC mass/(CMC mass+deionized water quality)), first stirs at low speed 30min, must
Stirred tank is opened when wanting to carry out scraping paddle, and the CMC powder that do not disperse sticky on blade and kettle wall is scraped in kettle；High-speed stirred again
60-90min forms clear viscous CMC glue until CMC is dissolved completely in deionized water；In the process, to prevent temperature
It is excessively high, openable water cooling circulating water, so that stirring temperature in the kettle is no more than 40 DEG C；The CMC glue made is taken out into stirred tank,
It is sealed, is spare；
2) powder is dry-mixed: silicon oxygen negative electrode active material being added in stirred tank, adds conductive agent SP, high-speed stirred 20-
30min, until conductive agent SP and silicon oxygen negative electrode active material powder are sufficiently mixed uniformly；
3) CMC glue is added in substep: being added and prepares into the silicon oxygen negative electrode active material/conductive agent SP powder mixed
CMC glue, the first step is added 65-75%CMC glue, stirs at low speed 20min, open stirred tank, will be stained on blade and kettle wall
Viscous powder and glue is scraped in kettle；High-speed stirred 40-60min again, until powder is finished with glue elementary mixing；To prevent temperature
It is excessively high, openable water cooling circulating water, so that stirring temperature in the kettle is no more than 40 DEG C；
Second step adds 15-20%CMC glue, then high-speed stirred 40-60min, after stirring open stirred tank after
It is continuous to scrape powder and glue sticky on blade and kettle wall in kettle；To prevent temperature excessively high, openable water cooling circulating water makes
Temperature in the kettle must be stirred no more than 40 DEG C；
Third step adds remaining CMC glue, then high-speed stirred 40-60min, be evacuated in kettle vacuum degree≤-
95kPa；To prevent temperature excessively high, openable water cooling circulating water, so that stirring temperature in the kettle is no more than 40 DEG C；
4) adding additives: the mixture of SBR or PAA or both is added into stirred tank, stirs at low speed 30-60min；
To prevent temperature excessively high, openable water cooling circulating water, so that stirring temperature in the kettle is no more than 40 DEG C；
5) viscosity: testing size viscosity is adjusted, if viscosity is more than 3500mPa.S, 0.5kg deionized water can be added every time,
30min is stirred at low speed, adjusts viscosity to required range viscosity；If within the scope of viscosity to 2000-3500mPa.S, can be not added
Ionized water；
6) reversion defoaming: after viscosity-adjusting agent OK range, low speed and reverse 30min, be evacuated in kettle vacuum degree≤-
95kPa；
7) it is sieved: can be transferred to next with 150 or 200 mesh net filtrations to get finished silicon oxygen negative electrode slurry when slurry goes out kettle
Process.
It should be noted that the stirred tank that above-mentioned steps use includes two kinds of specifications: 1) 30L stirred tank；2) 100L is stirred
Kettle.For 30L stirred tank, revolve low-speed range 10-25r/min, and revolve high speed 35-55r/min, rotation low speed 500-
1500r/min, rotation high speed 3000-3500r/min；For 100L stirred tank, revolve low-speed range 5-10r/min, public
Turn high speed 15-30r/min, rotation low speed 200-800r/min, rotation high speed 1000-2500r/min.
In a kind of possible embodiment of the present invention, the pH of the CMC glue is 6.0-8.5.
It is a further object of the present invention to provide a kind of negative electrode of lithium ion battery comprising negative current collector and be located at cathode collection
Negative electrode slurry layer on fluid, wherein negative electrode slurry layer is the coat formed by above-mentioned negative electrode slurry.
It is a further object of the present invention to provide a kind of lithium ion batteries comprising anode, cathode, lithium battery diaphragm and electrolysis
Liquid, wherein cathode is above-mentioned negative electrode of lithium ion battery.
3. beneficial effect
Compared with the prior art, the invention has the benefit that
(1) lithium ion battery silicon oxygen negative electrode slurry of the invention, the silicon oxygen for the use of accounting being 93-97 parts in solid material
For negative electrode active material instead of traditional graphite etc., the silicon-based anode gram volume being prepared is much higher than graphite cathode, and
Adjustable silicone content substantially adjusts the gram volume of negative electrode active material, has many advantages, such as that later cycles are stable, first effect is higher；
(2) lithium ion battery silicon oxygen negative electrode slurry of the invention, the partial size of silicon oxygen negative electrode active material are that D10:5-8 is micro-
Rice, D50:11-16 microns, D90≤30 micron, and the ratio of three is 1:(0.3-0.5): (0.1-0.2) on the one hand passes through control
Granulation diameter guarantees that the specific surface area of silicon oxygen negative electrode active material meets the requirements, the efficient combination of another aspect three, CMC and silicon
It can act synergistically between oxygen negative electrode active material, so that dispersibility is more preferable；
(3) CMC glue is divided into three steps and is added, most by the preparation method of lithium ion battery silicon oxygen negative electrode slurry of the invention
The crucially first step, adhesive liquid quantity and agitating mode including addition, the first step are added suitable CMC glue and make material abundant
Without regard to flow regime, " pureed " slurry can get strongest stirring shearing work under mechanical stirring, can reach for wetting
Rapid preliminary mixed effect (thick mixed)；And part solid-state equal nothing under mechanical stirring or flow regime even under majority solid-state
Method obtains strong stirring shearing work；Later two step is added a small amount of CMC glue and slurry is gradually made to form flowable shape
State, the CMC glue being added under high velocity agitation are quickly mixed with slurry, and it is sufficiently mixed to flow slurry fine particle in enough time
Close uniformly (thin mixed)；
(4) preparation method of lithium ion battery silicon oxygen negative electrode slurry of the invention, the CMC glue by reducing preparation contain admittedly
Amount, the lower CMC glue contained admittedly have better surface wettability, and the powder of more bigger serface is suitble to soak mixing；
(5) preparation method of lithium ion battery silicon oxygen negative electrode slurry of the invention is sufficiently mixed the premise of stirring in slurry
Under, it is eventually adding binder, is stirred at low speed, guarantees to prevent adhesive structure from failing again while mixed effect, last slurry is viscous
Degree can be adjusted with amount of deionized water is added；
(6) preparation method of lithium ion battery silicon oxygen negative electrode slurry of the invention, easy to operate, time is controllable, slurry system
Standby mixed effect is good, and silicon oxygen negative electrode slurry stability, dispersibility and coating performance are preferable, and the pole piece of coating is smooth, no group
Poly- particle, peel strength is big, therefore in charge and discharge process, pole piece current distribution is more uniform, so that silicon oxygen negative battery is for the first time
Efficiency is higher, and scatterplot is few, shows good circulation, multiplying power and electrode kinetics performance.
Detailed description of the invention
Fig. 1 is the flow diagram of the preparation method of lithium ion battery silicon oxygen negative electrode slurry of the present invention；
Fig. 2 is the charge-discharge performance figure of lithium ion battery of the present invention；
Fig. 3 is half-cell charging and discharging curve figure of the invention.
Specific embodiment
The present invention is further described below combined with specific embodiments below.
A kind of lithium ion battery silicon oxygen negative electrode slurry of the invention, including deionized water and solid material, solid material are pressed
Parts by weight proportion: 93-97 parts of silicon oxygen negative electrode active material, CMC1-2 parts, 1.2-2.0 times, the conductive agent SP that binder is CMC
1-2 parts, amounting to parts by weight is 100 parts；Wherein the partial size of the silicon oxygen negative electrode active material include D10:5-8 microns,
D50:11-16 microns, D90≤30 micron, and the ratio of three is 1:(0.3-0.5): (0.1-0.2), specific surface area 1.3-
3.0m2/ g, tap density 0.9-1.2g/cm3；The binder is SBR emulsion SBR or polyacrylate emulsion
PAA or SBR emulsion SBR: polyacrylate emulsion PAA be 1:(1-2) mixture；The specific surface of the conductive agent SP
Product is 60 ± 5m2/ g, pH 8-11；The binder is SBR emulsion SBR, pH 7-9, viscosity 50-
200mPa.S。
It is 1:(0.3-0.5 according to the ratio of D10:D50:D90): (0.1-0.2), conversion are weight percentage as D10:
58.82%-71.43%, D50:21.43%-29.41%, D90:7.14%-11.77%, the degree of substitution A=K* of the CMC
W (D10)/(W (D50)+W (D90)), K value range here are 0.5-1.2, degree of substitution A:2.1 >=A of preferred CMC >=
0.9。
As shown in Figure 1, the present invention also provides a kind of preparation method of lithium ion battery silicon oxygen negative electrode slurry, including following step
It is rapid:
1) prepare glue: appropriate amount of deionized water (40%-80% for accounting for stirred tank volume) is added in stirred tank, is being added
1.5-1.8% solid content CMC (solid content=CMC mass/(CMC mass+deionized water quality)), first stirs at low speed 30min, must
Stirred tank is opened when wanting to carry out scraping paddle, and the CMC powder that do not disperse sticky on blade and kettle wall is scraped in kettle；High-speed stirred again
60-90min forms clear viscous CMC glue until CMC is dissolved completely in deionized water；In the process, to prevent temperature
It is excessively high, openable water cooling circulating water, so that stirring temperature in the kettle is no more than 40 DEG C；The CMC glue made is taken out into stirred tank,
It is sealed, is spare；
2) powder is dry-mixed: silicon oxygen negative electrode active material being added in stirred tank, adds conductive agent SP, high-speed stirred 20-
30min, until conductive agent SP and silicon oxygen negative electrode active material powder are sufficiently mixed uniformly；
3) CMC glue is added in substep: being added and prepares into the silicon oxygen negative electrode active material/conductive agent SP powder mixed
CMC glue, the first step is added 65-75%CMC glue, stirs at low speed 20min, open stirred tank, will be stained on blade and kettle wall
Viscous powder and glue is scraped in kettle；High-speed stirred 40-60min again, until powder is finished with glue elementary mixing；To prevent temperature
It is excessively high, openable water cooling circulating water, so that stirring temperature in the kettle is no more than 40 DEG C；
Second step adds 15-20%CMC glue, then high-speed stirred 40-60min, after stirring open stirred tank after
It is continuous to scrape powder and glue sticky on blade and kettle wall in kettle；To prevent temperature excessively high, openable water cooling circulating water makes
Temperature in the kettle must be stirred no more than 40 DEG C；
Third step adds remaining CMC glue, then high-speed stirred 40-60min, be evacuated in kettle vacuum degree≤-
95kPa；To prevent temperature excessively high, openable water cooling circulating water, so that stirring temperature in the kettle is no more than 40 DEG C；
4) adding additives: the mixture of SBR or PAA or both is added into stirred tank, stirs at low speed 30-60min；
To prevent temperature excessively high, openable water cooling circulating water, so that stirring temperature in the kettle is no more than 40 DEG C；
5) viscosity: testing size viscosity is adjusted, if viscosity is more than 3500mPa.S, 0.5kg deionized water can be added every time,
30min is stirred at low speed, adjusts viscosity to required range viscosity；If within the scope of viscosity to 2000-3500mPa.S, can be not added
Ionized water；
6) reversion defoaming: after viscosity-adjusting agent OK range, low speed and reverse 30min, be evacuated in kettle vacuum degree≤-
95kPa；
7) it is sieved: can be transferred to next with 150 or 200 mesh net filtrations to get finished silicon oxygen negative electrode slurry when slurry goes out kettle
Process；The pH of the CMC glue is 6.0-8.5.
Embodiment 1
Negative electrode slurry main material: gram volume 420mAh/g silicon oxygen negative electrode active material；Each Ingredients Weight ratio is negative extremely active
Substance: SP:CMC:SBR (solid portion)=96:1.0:1.2:1.8, i.e., whole 100 parts by weight meters of material, negative electrode active material
96 parts of matter accounting, 1 part of SP accounting, 1.2 parts of CMC accounting, 1.8 parts of accounting of SBR (solid portion).
Wherein the partial size of the silicon oxygen negative electrode active material includes D10:5 microns, D50:11 microns, D90:25 microns,
And the ratio of three is 1:0.3:0.2, specific surface area 3.0m2/ g, tap density 1.2g/cm3.According to D10:D50:D90's
Ratio conversion is weight percentage as D10:66.67%, D50:20%, D90:13.33%, the degree of substitution A=of the CMC
0.5*66.67%/(20%+13.33%)=1.0, K value range here are 0.5.
Further, the specific surface area of the conductive agent SP is 60 ± 5m2/ g, pH 9；The binder is butylbenzene
Rubber latex SBR, pH 8, viscosity 200mPa.S.
With 30L stirred tank, for solid content 40%SBR lotion:
1) 11.565kg deionized water is added in kettle, adds 0.200kgCMC, stirs at low speed (revolution speed 25r/
Min, rotational velocity 1000r/min), stirred tank is opened after stirring, the CMC powder of blade and kettle wall will be attached to scoop
It scrapes in kettle；Same rotational speed continues to stir 15min, then opens stirred tank, and whether check on blade and kettle wall has attachment not disperse
CMC powder, scraped in kettle if having；High-speed stirred 80min (revolution 35r/min, rotation 4500r/min) again, in this process
In, temperature in the kettle is monitored, opens cooling circulating water in time, so that stirring temperature in the kettle is no more than 40 DEG C；It is formed after stirring
Clear viscous CMC glue；The CMC glue made is taken out into stirred tank, is sealed, is spare；
2) 16kg cathode main material, 0.167kgSP, high-speed stirred 20min (revolution 30r/min, rotation 0), until conductive is added
Agent is uniformly mixed with cathode main material；8.236kgCMC glue is added into kettle again and stirs at low speed 20min (revolution 25r/min, rotation
0) stirred tank, is opened, powder and glue sticky on blade and kettle wall are scraped in kettle；High-speed stirred 50min (revolution 45r/ again
Min, rotation 0)；In whole process, cooling circulating water is opened, so that stirring temperature in the kettle is no more than 40 DEG C；After stirring, powder
Between material, powder be uniformly mixed with glue, formed caddy slurry；
3) 2.353kgCMC glue, then high-speed stirred (revolution 45r/min, rotation 4500r/min) 40min are added in kettle,
Whether after stirring, checking on blade and kettle wall has the undispersed slurry of attachment and glue, scrapes in kettle if having；Finally again
2.353kgCMC glue is added into kettle, then high-speed stirred (revolution 45r/min, rotation 4500r/min) 60min, stirring terminate
Afterwards, whether have attachment undispersed slurry and glue, scrape in kettle if having if checking on blade and kettle wall；Meanwhile whole process
In, cooling circulating water is opened, so that stirring temperature in the kettle is no more than 40 DEG C；After stirring, flowing is formed compared with thick dark liquid
Somaplasm material；
4) 0.720kgSBR lotion is added into stirred tank, stirs at low speed (revolution 25r/min, rotation 800r/min)
50min.In the process, cooling circulating water is opened, so that stirring temperature in the kettle is no more than 40 DEG C；After stirring, still maintain viscous
Thick black liquor slurry form；
5) testing size viscosity can add 0.5kg deionized water every time, stir at low speed if viscosity is more than 3500mPa.S
30min (revolution 25r/min, rotation 800r/min), is adjusted within the scope of viscosity to 2000-3500mPa.S；Last low speed and reverse
(reversion 20r/min, rotation 0) 30min is evacuated to vacuum degree≤- 95kPa in kettle；Pass through 150 mesh when discharging after stirring
Sieve to get good fluidity black liquor slurry.
Above-mentioned black liquor slurry coating is formed into coat on a current collector, and constitutes lithium ion battery with collector
Cathode, the battery cathode and anode, lithium battery diaphragm and electrolyte, constitute lithium ion battery, wherein full battery and half-cell
Charge-discharge performance, as shown in Figures 2 and 3.
Embodiment 2
Negative electrode slurry main material: gram volume 500mAh/g silicon oxygen negative electrode active material；Each Ingredients Weight ratio is negative extremely active
Substance: SP:CMC:PAA (solid portion)=95.0:1.1:1.4:3.5, i.e., whole 100 parts by weight meters of material, negative electrode active
95.0 parts of substance accounting, 1.1 parts of SP accounting, 1.4 parts of CMC accounting, 3.5 parts of accounting of PAA (solid portion).
Wherein the partial size of the silicon oxygen negative electrode active material includes D10:8 microns, D50:16 microns, D90≤30 micron,
And the ratio of three is 1:0.5:0.2, specific surface area 1.5m2/ g, tap density 0.98g/cm3.According to D10:D50:D90
Ratio conversion be weight percentage as D10:58.82%, D50:29.41%, D90:11.77%, the degree of substitution of the CMC
A=0.9*58.82%/(29.41%+11.77%)=1.32, K value range here are 0.9.
Further, the specific surface area of the conductive agent SP is 60 ± 5m2/ g, pH 11.
With 100L stirred tank, for solid content 30%PAA lotion:
1) 45.326kg deionized water is added in kettle, adds 0.737kgCMC；Stir at low speed (revolution speed 10r/
Min, rotational velocity 600r/min), stirred tank is opened after stirring, the CMC powder of blade and kettle wall will be attached to scoop
It scrapes in kettle；Same rotational speed continues to stir 15min, then opens stirred tank, and whether check on blade and kettle wall has attachment not disperse
CMC powder, scraped if having into kettle, high-speed stirred 65min (revolution 15r/min, rotation 1700r/min) again, in this process
In, temperature in the kettle is monitored, opens cooling circulating water in time, so that stirring temperature in the kettle is no more than 40 DEG C；It is formed after stirring
The CMC glue made is taken out stirred tank by clear viscous CMC glue, is sealed, is spare；
2) 50kg cathode main material, 0.579kgSP, high-speed stirred 20min (revolution 15r/min, rotation 0), until conductive is added
Agent uniformly mixes with cathode main material, 34.547kgCMC glue is added into kettle again stir at low speed 20min (revolution 10r/min, from
Turn 0), to open stirred tank, powder and glue sticky on blade and kettle wall are scraped in kettle；High-speed stirred 45min (revolution again
20r/min, rotation 0), in whole process, open cooling circulating water so that stirring temperature in the kettle is no more than 40 DEG C, stirring terminates
Afterwards, between powder, powder is uniformly mixed with glue, forms caddy slurry；
3) 6.909kgCMC glue, then high-speed stirred (revolution 20r/min, rotation 1700r/min) 60min are added in kettle,
Whether after stirring, checking on blade and kettle wall has the undispersed slurry of attachment and glue, scrapes in kettle if having；Finally again
4.616kgCMC glue is added into kettle, then high-speed stirred (revolution 20r/min, rotation 1700r/min) 50min, stirring terminate
Afterwards, whether check on blade and kettle wall has the undispersed slurry of attachment and glue, scraped if having into kettle, simultaneously, whole process
In, cooling circulating water is opened, so that forming flowing compared with thick dark liquid after stirring temperature in the kettle is no more than 40 DEG C, stirs
Somaplasm material；
4) 6.140kgPAA lotion is added into stirred tank, stirs at low speed (revolution 10r/min, rotation 500r/min)
35min.In the process, cooling circulating water is opened, so that still maintaining viscous after stirring temperature in the kettle is no more than 40 DEG C, stirs
Thick black liquor slurry form；
5) testing size viscosity can add 1.2kg deionized water every time, stir at low speed if viscosity is more than 3500mPa.S
30min (revolution 10r/min, rotation 500r/min), is adjusted within the scope of viscosity to 2000-3500mPa.S；Last low speed and reverse
(reversion 10r/min, rotation 0) 30min, by 200 mesh when discharging after being evacuated to vacuum degree≤- 95kPa, stirring in kettle
Sieve to get good fluidity black liquor slurry.
Embodiment 3
The present embodiment is substantially the same manner as Example 1, the difference is that:
Negative electrode slurry main material: gram volume 500mAh/g silicon oxygen negative electrode active material；Each Ingredients Weight ratio is negative extremely active
Substance: SP:CMC:SBR (solid portion)=93.0:1:2:4, i.e., whole 100 parts by weight meters of material, negative electrode active material account for
Than 93.0 parts, 1 part of SP accounting, 2 parts of CMC accounting, 4 parts of accounting of SBR (solid portion).
Wherein the partial size of the silicon oxygen negative electrode active material includes D10:6 microns, D50:15 microns, D90:28 microns,
And the ratio of three is 1:0.4:0.1, specific surface area 2.5m2/ g, tap density 1.0g/cm3.According to D10:D50:D90's
Ratio conversion is weight percentage as D10:66.67%, D50:26.67%, D90:6.66%, the degree of substitution A=of the CMC
0.5*66.67%/(26.67%+6.66%)=1.0, K value range here are 0.5.
Further, the specific surface area of the conductive agent SP is 60 ± 5m2/ g, pH 10；The binder is fourth
Benzene rubber latex SBR, pH 11, viscosity 180mPa.S.
Claims (10)
1. a kind of lithium ion battery silicon oxygen negative electrode slurry, which is characterized in that including deionized water and solid material, solid material is pressed
Parts by weight proportion: 93-97 parts of silicon oxygen negative electrode active material, CMC1-2 parts, 1.2-2.0 times, the conductive agent SP that binder is CMC
1-2 parts, amounting to parts by weight is 100 parts.
2. lithium ion battery silicon oxygen negative electrode slurry according to claim 1, which is characterized in that the silicon oxygen negative electrode active
The partial size of substance includes D10:5-8 microns, D50:11-16 microns, D90≤30 micron, and the ratio of three is 1:(0.3-
0.5): (0.1-0.2)；Or specific surface area is 1.3-3.0m2/g；Or tap density is 0.9-1.2g/cm3。
3. lithium ion battery silicon oxygen negative electrode slurry according to claim 1 or 2, which is characterized in that the binder is
SBR emulsion SBR or polyacrylate emulsion PAA or SBR emulsion SBR: polyacrylate emulsion PAA is 1:(1-2)
Mixture.
4. lithium ion battery silicon oxygen negative electrode slurry according to claim 3, which is characterized in that the ratio of the conductive agent SP
Surface area is 60 ± 5m2/ g, pH 8-11.
5. lithium ion battery silicon oxygen negative electrode slurry according to claim 4, which is characterized in that the binder is butylbenzene
Rubber latex SBR, pH 7-9, viscosity 50-200mPa.S.
6. a kind of according to claim 1 to the preparation method of any one of 5 lithium ion battery silicon oxygen negative electrode slurries, feature exists
In, comprising the following steps:
1) prepare glue: being added appropriate amount of deionized water in stirred tank, and 1.5-1.8% solid content CMC is being added, is first stirring at low speed
30min, then high-speed stirred 60-90min form clear viscous CMC glue, herein mistake until CMC is dissolved completely in deionized water
Cheng Zhong, stirring temperature in the kettle are no more than 40 DEG C；The CMC glue made is taken out into stirred tank, is sealed, is spare；
2) powder is dry-mixed: silicon oxygen negative electrode active material is added in stirred tank, adds conductive agent SP, high-speed stirred 20-30min,
It is sufficiently mixed uniformly to conductive agent SP and silicon oxygen negative electrode active material；
3) CMC glue is added in substep: into the silicon oxygen negative electrode active material/conductive agent SP powder mixed, addition is prepared
CMC glue, the first step are added the CMC glue of 65-80%, stir at low speed 20min；High-speed stirred 40-60min again, until powder with
Glue elementary mixing finishes, and stirring temperature in the kettle is no more than 40 DEG C；
Second step adds 15-20%CMC glue, then high-speed stirred 40-60min, and stirring temperature in the kettle is no more than 40 DEG C；
Third step adds remaining CMC glue, then high-speed stirred 40-60min, is evacuated to vacuum degree≤- 95kPa in kettle, stirs
Temperature in the kettle is mixed no more than 40 DEG C；
4) adding additives: the mixture of SBR or PAA or both being added into stirred tank, stirs at low speed 30-60min, stirs
Temperature in the kettle is no more than 40 DEG C；
5) viscosity: testing size viscosity is adjusted, if viscosity is more than 3500mPa.S, 0.5kg deionized water, low speed can be added every time
30min is stirred, adjusts viscosity to required range viscosity；If within the scope of viscosity to 2000-3500mPa.S, deionization can be not added
Water；
6) reversion defoaming: after viscosity-adjusting agent OK range, low speed and reverse 30min is evacuated to vacuum degree≤- 95kPa in kettle.
7) it is sieved: next work can be transferred to 150 or 200 mesh net filtrations when slurry goes out kettle to get finished silicon oxygen negative electrode slurry
Sequence.
7. the preparation method of lithium ion battery silicon oxygen negative electrode slurry according to claim 6, which is characterized in that the CMC
The pH of glue is 6.0-8.5.
8. the preparation method of lithium ion battery silicon oxygen negative electrode slurry according to claim 6, which is characterized in that in the step
Rapid 1) prepare glue after stirring at low speed 30min, opens stirred tank and carries out scraping paddle, do not divide sticky on blade and kettle wall
CMC powder is dissipated to scrape in kettle；Or in the first step, after stirring at low speed 20min, stirred tank is opened, will be stained on blade and kettle wall
Viscous powder and glue is scraped in kettle；Or after the second step, high-speed stirred 40-60min, opens stirred tank and continue blade
It is scraped in kettle with powder and glue sticky on kettle wall.
9. a kind of negative electrode of lithium ion battery, which is characterized in that the cathode slurry including negative current collector and on negative current collector
The bed of material, wherein negative electrode slurry layer is the coat that the negative electrode slurry as described in any one of claim 1-5 is formed.
10. a kind of lithium ion battery, which is characterized in that including anode, cathode, lithium battery diaphragm and electrolyte, wherein cathode is
Cathode described in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175139.2A CN109950485A (en) | 2019-03-08 | 2019-03-08 | A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175139.2A CN109950485A (en) | 2019-03-08 | 2019-03-08 | A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109950485A true CN109950485A (en) | 2019-06-28 |
Family
ID=67009448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910175139.2A Pending CN109950485A (en) | 2019-03-08 | 2019-03-08 | A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109950485A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600674A (en) * | 2019-08-31 | 2019-12-20 | 风帆有限责任公司 | Slurry mixing process of lithium ion battery slurry |
| CN110660997A (en) * | 2019-09-18 | 2020-01-07 | 蜂巢能源科技有限公司 | Battery slurry and preparation method thereof, and battery pole piece and preparation method thereof |
| CN111370672A (en) * | 2020-03-20 | 2020-07-03 | 天津市捷威动力工业有限公司 | Preparation method of negative electrode slurry |
| CN112133911A (en) * | 2020-10-09 | 2020-12-25 | 浙江锋锂新能源科技有限公司 | Lithium ion battery cathode slurry and preparation method thereof |
| CN112531202A (en) * | 2020-12-04 | 2021-03-19 | 上海普澜特夫精细化工有限公司 | Preparation method of electrode slurry containing porous material |
| CN112713257A (en) * | 2020-12-29 | 2021-04-27 | 湖北亿纬动力有限公司 | Preparation method of negative electrode slurry and negative electrode slurry |
| CN112952029A (en) * | 2021-02-01 | 2021-06-11 | 河南克能新能源科技有限公司 | Silica-carbon lithium ion battery composite negative electrode slurry, preparation method thereof and lithium ion battery negative electrode prepared from silica-carbon lithium ion battery composite negative electrode slurry |
| CN113270570A (en) * | 2021-05-07 | 2021-08-17 | 深圳衍化新能源科技有限公司 | Preparation method of lithium ion battery anode slurry |
| WO2022041831A1 (en) * | 2020-08-31 | 2022-03-03 | 贝特瑞新材料集团股份有限公司 | Silicon oxide composite material, negative electrode material, negative electrode and lithium ion battery, and preparation method therefor |
| CN115138231A (en) * | 2022-08-12 | 2022-10-04 | 郑州比克电池有限公司 | Mixing method for improving consistency of lithium ion battery slurry |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140377647A1 (en) * | 2013-06-20 | 2014-12-25 | Shin-Etsu Chemical Co., Ltd. | Active material for nonaqueous electrolyte secondary battery, negative electrode form, and nonaqueous electrolyte secondary battery |
| CN105070915A (en) * | 2015-08-25 | 2015-11-18 | 田东 | Method for preparing lithium battery graphite cathode slurry |
| CN105453314A (en) * | 2013-08-05 | 2016-03-30 | 昭和电工株式会社 | Negative electrode material for lithium ion batteries and use thereof |
| US20180083272A1 (en) * | 2016-09-19 | 2018-03-22 | Samsung Electronics Co., Ltd. | Porous silicon composite cluster and carbon composite thereof, and electrode, lithium battery, field emission device, biosensor and semiconductor device each including the same |
| US20180145316A1 (en) * | 2016-11-18 | 2018-05-24 | Samsung Electronics Co., Ltd. | Porous silicon composite cluster structure, method of preparing the same, carbon composite using the same, and electrode, lithium battery, and device each including the same |
| CN109244386A (en) * | 2018-08-17 | 2019-01-18 | 广西卓能新能源科技有限公司 | A kind of siliceous lithium battery of high-energy and preparation method |
-
2019
- 2019-03-08 CN CN201910175139.2A patent/CN109950485A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140377647A1 (en) * | 2013-06-20 | 2014-12-25 | Shin-Etsu Chemical Co., Ltd. | Active material for nonaqueous electrolyte secondary battery, negative electrode form, and nonaqueous electrolyte secondary battery |
| CN105453314A (en) * | 2013-08-05 | 2016-03-30 | 昭和电工株式会社 | Negative electrode material for lithium ion batteries and use thereof |
| CN105070915A (en) * | 2015-08-25 | 2015-11-18 | 田东 | Method for preparing lithium battery graphite cathode slurry |
| US20180083272A1 (en) * | 2016-09-19 | 2018-03-22 | Samsung Electronics Co., Ltd. | Porous silicon composite cluster and carbon composite thereof, and electrode, lithium battery, field emission device, biosensor and semiconductor device each including the same |
| US20180145316A1 (en) * | 2016-11-18 | 2018-05-24 | Samsung Electronics Co., Ltd. | Porous silicon composite cluster structure, method of preparing the same, carbon composite using the same, and electrode, lithium battery, and device each including the same |
| CN109244386A (en) * | 2018-08-17 | 2019-01-18 | 广西卓能新能源科技有限公司 | A kind of siliceous lithium battery of high-energy and preparation method |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600674A (en) * | 2019-08-31 | 2019-12-20 | 风帆有限责任公司 | Slurry mixing process of lithium ion battery slurry |
| CN110660997A (en) * | 2019-09-18 | 2020-01-07 | 蜂巢能源科技有限公司 | Battery slurry and preparation method thereof, and battery pole piece and preparation method thereof |
| CN111370672A (en) * | 2020-03-20 | 2020-07-03 | 天津市捷威动力工业有限公司 | Preparation method of negative electrode slurry |
| CN111370672B (en) * | 2020-03-20 | 2023-08-18 | 天津市捷威动力工业有限公司 | Preparation method of negative electrode slurry |
| WO2022041831A1 (en) * | 2020-08-31 | 2022-03-03 | 贝特瑞新材料集团股份有限公司 | Silicon oxide composite material, negative electrode material, negative electrode and lithium ion battery, and preparation method therefor |
| CN112133911A (en) * | 2020-10-09 | 2020-12-25 | 浙江锋锂新能源科技有限公司 | Lithium ion battery cathode slurry and preparation method thereof |
| CN112531202A (en) * | 2020-12-04 | 2021-03-19 | 上海普澜特夫精细化工有限公司 | Preparation method of electrode slurry containing porous material |
| CN112713257A (en) * | 2020-12-29 | 2021-04-27 | 湖北亿纬动力有限公司 | Preparation method of negative electrode slurry and negative electrode slurry |
| CN112713257B (en) * | 2020-12-29 | 2022-04-08 | 湖北亿纬动力有限公司 | Preparation method of negative electrode slurry and negative electrode slurry |
| CN112952029A (en) * | 2021-02-01 | 2021-06-11 | 河南克能新能源科技有限公司 | Silica-carbon lithium ion battery composite negative electrode slurry, preparation method thereof and lithium ion battery negative electrode prepared from silica-carbon lithium ion battery composite negative electrode slurry |
| CN113270570A (en) * | 2021-05-07 | 2021-08-17 | 深圳衍化新能源科技有限公司 | Preparation method of lithium ion battery anode slurry |
| CN115138231A (en) * | 2022-08-12 | 2022-10-04 | 郑州比克电池有限公司 | Mixing method for improving consistency of lithium ion battery slurry |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109950485A (en) | A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery | |
| CN102738446B (en) | Lithium ion battery slurry, preparation method of the lithium ion battery slurry, and lithium ion battery | |
| WO2017031885A1 (en) | Preparation method for lithium battery negative-electrode slurry | |
| CN101393985B (en) | Negative pole material preparation method | |
| CN102891306B (en) | Lithium ion battery Si/Li4Ti5O12/CNT composite negative pole material and preparation method thereof | |
| CN106684329A (en) | Dispersion method for positive electrode slurry of lithium ion battery | |
| CN106299291A (en) | A kind of ultralow temperature lithium iron phosphate dynamic battery and preparation method thereof | |
| CN103022433A (en) | Method for preparing lithium battery slurry | |
| CN111933938B (en) | Preparation method of ternary cathode slurry | |
| CN109346671A (en) | A kind of anode of lithium ion battery slurry and the preparation method and application thereof | |
| CN110600671B (en) | Semi-dry method batching process of lithium ion battery electrode slurry, lithium ion battery positive plate, battery negative plate and lithium ion battery | |
| CN104681811A (en) | Preparation method of lithium iron phosphate positive electrode material slurry | |
| CN103985837A (en) | Preparation technology for lithium ion battery electrode slurry | |
| CN111370672A (en) | Preparation method of negative electrode slurry | |
| CN106340649A (en) | Preparation method of lithium ferric phosphate cathode slurry | |
| CN101127394A (en) | A lithium secondary battery cathode including graphite and its making method | |
| CN107611375A (en) | A kind of preparation method of lithium ion battery anode glue size | |
| CN111697225A (en) | Lithium iron phosphate anode slurry for lithium ion battery, preparation method of lithium iron phosphate anode slurry and anode plate | |
| CN110492066B (en) | Lithium ion battery negative plate capable of being charged quickly and preparation method thereof | |
| WO2017032155A1 (en) | Preparation method for lithium battery lithium titanate negative electrode slurry | |
| CN104733689A (en) | Preparation method for lithium iron phosphate positive electrode of lithium ion battery | |
| CN103346318A (en) | Li-ion positive electrode slurry and preparation method thereof | |
| CN105489844A (en) | Preparation method of anode paste for lithium-ion power battery | |
| CN108565393A (en) | A kind of conjunction paste-making method of lithium ion battery anode slurry | |
| CN112755872A (en) | Preparation method of battery cathode slurry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210809 Address after: No.350 Jinshanhu Road, Maanshan economic and Technological Development Zone, Anhui Province 243000 Applicant after: Beehive energy technology (Ma'anshan) Co.,Ltd. Address before: Room 2-202, 259 huxinan Road, Maanshan economic and Technological Development Zone, Anhui Province 243000 Applicant before: ANHUI TAINENG NEW ENERGY TECHNOLOGY Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190628 |