CN102237527B - Lithium ion battery and lithium ion battery electrode as well as electrode material and paste for lithium ion battery - Google Patents
Lithium ion battery and lithium ion battery electrode as well as electrode material and paste for lithium ion battery Download PDFInfo
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- CN102237527B CN102237527B CN201010166566.3A CN201010166566A CN102237527B CN 102237527 B CN102237527 B CN 102237527B CN 201010166566 A CN201010166566 A CN 201010166566A CN 102237527 B CN102237527 B CN 102237527B
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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
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- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a lithium ion battery and an electrode thereof as well as an electrode material and paste for the lithium ion battery. The electrode material comprises an electrode active material and an adhesive, wherein the adhesive comprises alginate propylene glycol or alginate. The adhesive provided by the invention has good adhesive property; when the adhesive is used in the lithium ion battery paste, the electrode paste cannot be agglomerated and has the advantages of no aggregation, good dispersibility, strong stability, dressing easiness and no settlement; and meanwhile, the prepared electrode piece has good uniformity, and the lithium ion battery electrode with the good dressing strength and flexibility can be prepared, thus the capacity, the multiplying power property and the cycle performances of the lithium ion battery can be improved.
Description
Technical field
The present invention relates to a kind of lithium ion battery electrode material and the electrode slurry containing this electrode material and lithium ion cell electrode, the battery prepared with this electrode slurry.
Background technology
Lithium rechargeable battery refers to respectively with the ion battery that the compound of two reversibly Infix and desfix lithium ions is formed as both positive and negative polarity.Because of advantages such as its specific energy are high, operating voltage is high, operating temperature range is wide, self-discharge rate is low, have extended cycle life, pollution-free, lightweight, security performance is good, thus application is extensive.
Battery electrode is as the core building block of lithium ion battery, also more and more higher to its performance requirement.The binding agent that battery electrode generally comprises electrode active material and will bond between electrode active material particles and particle and between electrode active material and collector body.Binding agent, as the primary raw material of battery electrode, works the effects such as efflorescence that come off preventing active material, decides the performance of electrode to a great extent, therefore has higher requirement to its caking property, consumption and the impact on battery electrode other materials.
The preparation technology of existing battery is more complicated, battery electrode preparation generally comprises the operations such as slurry coating, drying, compacting, rolling cut, winding, External Force Acting can be subject in each process, particularly a large amount of explained hereafter, the suitable environment of links cannot be ensured, unavoidably there is pole piece and fall material, even lose, thus the consistency of battery electrode cannot be ensured, affect the charging and discharging capacity of battery and the cycle performance of battery.Simultaneously battery electrode material particularly cell negative electrode material can produce change in volume before and after removal lithium embedded, and the fragmentation of electrode material in cyclic process, efflorescence can cause the forfeiture of removal lithium embedded ability, the deterioration of the afflux characteristic that electrode material also can come off from collector and cause, simultaneously collector produces fold and the bulging etc. of coiling body battery core that causes causes the cycle performance of battery obviously to descend a series of fatal problem of degradation.Just require optional can preferably binding agent, improve the performance of the battery electrode of preparation.
At present, conventional binders for electrodes is styrene butadiene rubbers (SBR) or the fluoropolymer not possessing functional group, as polyvinylidene fluoride (PVDF).PVDF has strong bonding force, but PVDF easily occurs swelling in organic electrolyte is as propylene carbonate, dimethoxy-ethane or gamma-butyrolacton, makes the Initial adhesion of binding agent and electrode structure be difficult to be restored, cause battery performance to decline, the cycle performance of battery is poor.SBR has excellent elasticity capacity, but the bonding force of SBR is more weak, and the bonding between particle and particle and between particle and collector is insecure, the afflux poor performance of electrode, and electrode performance reduces.And these binding agents still exist material, damage more serious situation in particularly producing in actual use, desirable cannot be reached.
Summary of the invention
What the present invention was more serious in order to the electrode material solving prior art still exists in battery electrode preparation and use procedure falls material, affects the discharge capacity first of battery and the problem of cycle performance, there is provided that a kind of performance is more excellent, the novel battery electrode material of the rate of finished products that can improve battery, comprise electrode active material and binding agent, wherein binding agent comprises alginate propylene glycol or alginate.
The present inventor surprisingly finds to adopt binders for electrodes of the present invention, well can be applied to electrode, not only improves the caking property between electrode slurry, improves the caking property of electrode slurry and collector body, avoids the situation appearance that pole piece falls material, loses; And the electrode slurry stable performance of preparation, electrode slurry good dispersion, should not reunite and stick vessel, be easy to store and slurry, optimize explained hereafter, improve the coating property of slurry, can thickness be prepared evenly pole piece, improve the utilance of battery with two side terminals and pole piece, reduce production cost.
Invention also provides the lithium ion battery electrode sizing agent that a kind of rheological property is better, stability is stronger, dressing strength is good and pole piece pliability that is preparation is higher, comprise above-mentioned electrode active material and solvent.
Invention also provides the lithium ion cell electrode that a kind of discharge capacity first, multiplying power discharging property and cycle performance are more excellent, it is coated on electrode collector by above-mentioned electrode slurry, and drying, calendering prepare.
Another object of the present invention improves a kind of lithium ion battery, comprises battery container and the electrode group be sealed in this battery container and electrolyte; Electrode group comprises positive pole, negative pole and the barrier film between positive pole and negative pole, and wherein, positive pole and/or negative pole are above-mentioned lithium ion cell electrode.
Accompanying drawing explanation
Fig. 1 a is the amplitude sweep figure of the battery cathode slurry of the embodiment of the present invention 1, embodiment 6 and comparative example 1 preparation, wherein, " ■ " line represents the G ' storage modulu of embodiment 1, and " ▲ " line represents the G " loss modulus of embodiment 1; " * " line represents the G ' storage modulu of embodiment 6, and "○" line represents the G " loss modulus of embodiment 6; " △ " line represents the G ' storage modulu of comparative example 1,
line represents the G " loss modulus of comparative example 1;
Fig. 1 b is the rheological behavior figure of the battery cathode slurry of the embodiment of the present invention 1, embodiment 6 and comparative example 1 preparation;
Fig. 2 a, Fig. 2 b, Fig. 2 c are the stability resolution chart of the battery cathode slurry of the embodiment of the present invention 1, embodiment 6 and comparative example 1 preparation respectively;
Fig. 3 is the negative pole piece of battery dressing strength resolution chart of the embodiment of the present invention 1, embodiment 6 and comparative example 1 preparation;
Fig. 4 is the negative pole piece of battery suppleness performance test figure of the embodiment of the present invention 1, embodiment 7 and comparative example 1 preparation.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides the novel battery electrode material that a kind of performance is more excellent, comprise electrode active material and binding agent, wherein, binding agent comprises alginate propylene glycol or alginate, the adhesive property of electrode slurry can not only be improved, and stability and the dispersiveness of electrode slurry can be improved, improve battery with two side terminals, rate of finished products and cycle performance.
Wherein, alginate the present invention be not particularly limited, and be generally the non-heavy metal salt of alginic acid, preferred alginate is selected from one or more in sodium alginate, potassium alginate or ammonium alginate.
Preferred binder of the present invention also comprises water-based binder, wherein, water-based binder can be selected from one or more in sodium carboxymethylcellulose, carboxyethyl cellulose, ethyl cellulose, carboxymethylethylcellulose, CMC, hydroxypropyl cellulose or butadiene-styrene rubber.Aqueous binders is easily cross-linked with more hydroxyl in alginate propylene glycol or alginate by intermolecular Van der Waals force and the intermolecular π of plane-π active force, makes pulp solution form a kind of interactive network structure, further the stability of raising pulp solution.
The present invention further preferred water-based binder is sodium carboxymethylcellulose and styrene-butadiene latex, by making the combination of alginate propylene glycol or alginate and sodium carboxymethylcellulose and styrene-butadiene latex, surprisingly can find that the performance that it combines is more excellent, viscosity rheological property and the more excellent electrode slurry of stability can be prepared, improve the electrochemical stability of battery.
The present invention further preferred with the total amount of binding agent for benchmark, weight hundred parts of content of alginate propylene glycol or alginate are 0.008-40%, more preferably 15%-25%; Weight hundred parts of content of water-based binder are 60%-100%, more preferably 75%-85%.When binding agent be alginate propylene glycol or alginate and sodium carboxymethylcellulose, styrene-butadiene latex time, preferably weight hundred parts of content of alginate propylene glycol or alginate are 0.5-40% further; Weight hundred parts of content of sodium carboxymethylcellulose are 15%-30%, and the weight percentage of styrene-butadiene latex is 45-75%.Further raising slurry and pole piece performance.
Electrode active material can be positive electrode active materials and/or negative active core-shell material, the anode electrode that processability is excellent or battery cathode electrode.
Positive electrode active materials can be various positive active material known in those skilled in the art, can be selected from such as Li
xni
1-ycoO
2(wherein, 0.9≤x≤1.1,0≤y≤1.0), Li
mmn
2-nb
no
2(wherein, B is transition metal, 0.9≤m≤1.1,0≤n≤1.0) and Li
1+am
bmn
2-bo
4the phosphate such as one or more or LiFePO4 in (wherein ,-0.1≤a≤0.2,0≤b≤1.0, M is one or more in lithium, boron, magnesium, aluminium, titanium, chromium, iron, cobalt, nickel, copper, zinc, gallium, yttrium, fluorine, iodine, element sulphur).Preferred positive electrode active materials is LiFePO4.When battery electrode is anode electrode, battery electrode paste generally also comprises conductive agent, and improve the electric conductivity of material, conductive agent can be generally graphite and carbon fiber, and the weight ratio of graphite and carbon fiber is 100: 1 to 100: 10.
Negative active core-shell material can be selected from the negative electrode active material of lithium rechargeable battery routine, as one or more in native graphite, Delanium, petroleum coke, organic cracking carbon, carbonaceous mesophase spherules, carbon fiber, ashbury metal, silicon alloy.Can contain or not contain conductive agent.
Invention also provides lithium ion battery electrode sizing agent, comprise above-mentioned electrode material and solvent.
Solvent of the present invention is water solvent, is generally water, adopts water system slurry, be conducive to binding agent dispersion evenly, water system slurry, reduces environmental pollution simultaneously.The concentration of binding agent can adjust this concentration flexibly according to the viscosity of slurry coating of positive pole to be prepared and cathode size and the requirement of operability, and mode is conventionally known to one of skill in the art.Adhesive can use with the aqueous solution or emulsion form, also can use in solid form, preferably uses with the aqueous solution or emulsion form.The consumption of solvent enables electrode slurry be coated on collector body.
Also polyethylene glycol is comprised in the further preferred electrode slurry of the present invention, preferred binder also comprises water-based binder, polyethylene glycol can be soluble in water, do not affect binding agent adhesive property, can evenly be coated on adhesive particle surface, reduce the reunion between binding agent, can with intermolecular Van der Waals force and the intermolecular pi-pi bond active force of plane and binding agent particularly water-based binder be combined, binding agent is made to be dispersed in active material particle surface, reduce the reunion between particle, improve electrode slurry dispersed, rheological characteristic and stability, polyethylene glycol has more hydroxy functional group, good planar structure, more π-π can be formed with binding agent to be good for, and then be more conducive to it and be coated on adhesive particle surface uniformly, suppression adhesive particle particularly particle diameter is generally less than the reunion between the water system latex class binding agent of 400 nanometers, stop the reunion between active material particle, thus formed dispersed, stability and the better electrode slurry of rheological characteristic, improve electrode performance, increase battery capacity.
General with the total amount of electrode slurry for benchmark, weight hundred parts of content of electrode active material are 35%-60%; Weight hundred parts of content of binding agent are 0.5%-10%; Weight hundred parts of content of polyethylene glycol are 0.5-3%; Weight hundred parts of content of conductive agent are 0.2-5%; Weight hundred parts of content of solvent are 30%-60%.
The present invention improves a kind of lithium ion cell electrode simultaneously, and electrode is coated on electrode collector by above-mentioned electrode slurry, and drying, calendering prepare.
The various electrode collectors that electrode collector is known to the skilled person, such as, when electrode is positive pole, electrode collector can be aluminium foil, Copper Foil, nickel plated steel strip etc., and the present invention selects aluminium foil to make collector body.When electrode is negative pole, collector body can be selected from one or more in aluminium foil, Copper Foil, nickel plated steel strip, Punching steel strip, and the preferred Copper Foil of the present invention is collector body.
Wherein, dry, the step of calendering, like the prior art, namely dry usually under vacuum at 50-160 DEG C, carry out at preferred 80-150 DEG C.The rolling condition that calendering can adopt this area conventional, such as 0.5-3.0 MPa.
The preparation of electrode can also comprise other steps, and such as, the cut-parts of reprocessing, cut-parts are known to the skilled person, and after having rolled, cut, obtain electrode according to the positive pole size of prepared battery request.
Invention also provides lithium rechargeable battery, comprise battery container and the electrode group be sealed in this battery container and electrolyte; Electrode group comprises positive pole, negative pole and the barrier film between positive pole and negative pole, and wherein, positive pole and/or negative pole are above-mentioned electrode.Because the present invention only relates to the improvement to prior art lithium ion secondary battery positive electrode, therefore other the Nomenclature Composition and Structure of Complexes of lithium rechargeable battery is had no particular limits.
Barrier film has electrical insulation capability and liquid retainability energy, is arranged between positive pole and negative pole, and is sealed in battery case together with electrolyte with positive pole, negative pole.Described barrier film can be the general various barrier films in this area, such as by those skilled in the art in the modified poly ethylene felt of each production trade mark of known each manufacturer production, modified polypropene felt, ultra-fine fibre glass felt, vinylon felt or nylon felt with wettability microporous polyolefin film through welding or bonding composite membrane.
Electrolyte is the conventional electrolyte in this area, as the mixed solution of electrolyte lithium salt and nonaqueous solvents.Electrolyte lithium salt is selected from lithium hexafluoro phosphate (LiPF
6), one or more in lithium perchlorate, LiBF4, hexafluoroarsenate lithium, lithium halide, chlorine lithium aluminate and fluorocarbon based Sulfonic Lithium.Organic solvent can be selected from chain acid esters and ring-type acid esters mixed solution, and wherein chain acid esters can be dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (EMC), methyl propyl carbonate (MPC), dipropyl carbonate (DPC) and other is fluorine-containing, sulfur-bearing or containing at least one in the chain organosilane ester of unsaturated bond.Ring-type acid esters can be ethylene carbonate (EC), propene carbonate (PC), vinylene carbonate (VC), gamma-butyrolacton (γ-BL), sultone and other is fluorine-containing, sulfur-bearing or containing at least one in the ring-type organosilane ester of unsaturated bond.In described electrolyte, the concentration of electrolyte lithium salt is generally 0.1-2 mol/L, is preferably 0.8-1.2 mol/L.
Unless stated otherwise, various solvent of the present invention and reagent are commercially available analytical reagent.
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment 1
(1) preparation of positive pole:
First 1.5g sodium carboxymethylcellulose (CMC) is dissolved in (solution concentration is 1.5%) in 98.5ml water, 1.5g alginate propylene glycol is dissolved in the above-mentioned CMC aqueous solution subsequently, in above-mentioned mixed liquor, adds 100 grams of LiCoO
2(FMC Corp.'s commodity) and 2g conductive carbon black, stir 2 hours, then add 3g styrene-butadiene latex (SBR), uses common four leaf oars to stir stirring 0.5 hour, and then obtain anode sizing agent (LiCoO
2: CMC: alginate propylene glycol: SBR: carbon black: deionized water=100: 1.5: 1.5: 3: 2: 98.5).
This anode sizing agent is uniformly applied on aluminium foil, through 125 DEG C of dryings 1 hour, then rolls, be cut into the positive plate of 424 × 44 millimeters, containing 6.2 grams of positive active materials in each positive plate.
(2) preparation of negative pole
First 1.5g sodium carboxymethylcellulose (CMC) is dissolved in (solution concentration is 1.5%) in 98.5ml water, subsequently 1.5g alginate propylene glycol is dissolved in the above-mentioned CMC aqueous solution, 100g graphite is added in above-mentioned mixed liquor, stir 2 hours, add 3g styrene-butadiene latex (SBR) again, use common four leaf oars to stir stirring 0.5 hour, and then obtain cathode size (graphite: CMC: alginate propylene glycol: SBR: deionized water=100: 1.5: 0.5: 3: 98.5).
Be coated on equably on Copper Foil by this cathode size, at the tableting under pressure of 2 MPas, 300 DEG C of heat treatment 24 hours, then rolls, cuts into the negative plate of 416mm × 45mm under a nitrogen atmosphere, containing 3.2 grams of negative active core-shell materials in each negative plate.
(3) preparation of battery
The polypropylene diaphragm of above-mentioned anode pole piece, 20 micron thickness and cathode pole piece are overlapped into battery core successively, and load in battery case, electrolyte is injected battery case with the amount of 3.8g/Ah, conventional LP053450 battery is made in sealing.Electrolyte contains LiPF
6and nonaqueous solvents, LiPF described in electrolyte
6concentration be 1 mol/L, nonaqueous solvents is ethylene carbonate (EC) with diethyl carbonate (DMC) weight ratio is the ethylene carbonate of 1: 1 and the mixed solvent of diethyl carbonate.
Embodiment 2
The method identical with embodiment 1 and step is adopted to prepare positive pole, negative pole and battery, unlike the alginate propylene glycol 0.5g added, sodium carboxymethylcellulose 1.5g, styrene-butadiene latex 3g.
Embodiment 3
The method identical with embodiment 1 and step is adopted to prepare positive pole, negative pole and battery, unlike the alginate propylene glycol 3g added, sodium carboxymethylcellulose 1.5g, styrene-butadiene latex 3g.
Embodiment 4
The method identical with embodiment 1 and step is adopted to prepare positive pole, negative pole and battery, unlike the alginate propylene glycol 4.5g added, sodium carboxymethylcellulose 1.5g, styrene-butadiene latex 4.5g.
Embodiment 5
Adopting the method identical with embodiment 1 and step to prepare positive pole, negative pole and battery, is 6g alginate propylene glycol unlike binding agent.
Embodiment 6
Adopt the method identical with embodiment 1 and step to prepare positive pole, negative pole and battery, also contain 1g polyethylene glycol unlike in positive pole, cathode size.
Embodiment 7
Adopting the method identical with embodiment 1 and step to prepare positive pole, negative pole and battery, is sodium alginate 1.5g unlike binding agent, sodium carboxymethylcellulose 1.5g, styrene-butadiene latex 3g.
Comparative example 1
Adopting the method identical with embodiment 1 and step to prepare positive pole, negative pole and battery, is 1.5g sodium carboxymethylcellulose (CMC) and 4.5g styrene-butadiene latex (SBR) unlike binding agent in positive pole, cathode size.
Performance test:
1. electrode slurry rheology testing
The rotating flow of Physica MCR 301 model of Anton Paar company is adopted to become tester, rheology testing is carried out according to the American Society Testing and Materials's cathode size of mark ASTM D 7175-2005 to the embodiment 1 that placed after 1 hour, embodiment 6 and comparative example 1, (scan amplitude figure is at 25 DEG C to test result such as Fig. 1 a, normal pressure, angular speed 10s
-1under constant condition, test shear strain from 0.1%-1000% change procedure, the change of storage modulu and loss modulus) and Fig. 1 b (flow diagram is at 25 DEG C, under condition of normal pressure, test shear rate from 0.01s
-1-1000s
-1in change procedure, the situation of change of viscosity);
2. electrode slurry stability test
Use Formulaction stability separating apparatus to carry out stability sign to the cathode size of embodiment 1, embodiment 6 and comparative example 1 preparation respectively, test result is as Fig. 2.
3. pole piece dressing performance test
The negative pole (pole piece specification is 4cm*10cm) using MODEL 1220S type contact engaging and separating force experimental machine to prepare embodiment 1, embodiment 6 and comparative example 1 carries out dressing strength test, and test result is as Fig. 3.
4. pole piece suppleness performance test
Cathode pole piece prepared by embodiment 1, embodiment 7 and comparative example 1 is cut into the rectangle of size 4cm*5cm, length direction bends and is fixed on spacing in MODEL 1220S type full-automatic contact engaging and separating force experimental machine is in the upper lower clamp of 15mm, lower clamp rises with 10mm/min speed, doubling 180 ° of states when pole piece being depressed into 20N pressure, load-displacement curves in record fixture uphill process, test result is as Fig. 4.
5. battery multiplying power discharging property test
Be placed in by battery prepared by embodiment 1-7 and comparative example 1 on new Weir-3000 type electrochemical property test instrument, with 0.075A current charges, with 0.075A, 0.75A, 2.25A current discharge, voltage range 3V-4.2V, record discharge capacity, test result is as table 1.
6, discharge capacity test first:
The electrode slice prepared with embodiment 1-7 and comparative example 1 is for positive pole, take lithium metal as negative pole, produce the button cell that model is 2016, above-mentioned battery is placed on new Weir-3000 type electrochemical property test instrument, voltage range 3V-4.2V, with 0.075A current charge-discharge electricity, record its discharge capacity first.Test result is as table 2.
7, cycle performance test
Be placed in by battery prepared by embodiment 1-7 and comparative example 1 on new Weir-3000 type electrochemical property test instrument, voltage range 3V-4.2V, with 0.075A current charge-discharge electricity, record its charge/discharge capacity, test result is as table 3.
Table 1
| Battery | Capacity (mAh/g) during 0.075A | Capacity (mAh/g) during 0.75A | Capacity (mAh/g) during 2.25A |
| Embodiment 1 | 760 | 730 | 680 |
| Embodiment 2 | 724 | 694 | 644 |
| Embodiment 3 | 717 | 681 | 631 |
| Embodiment 4 | 703 | 667 | 617 |
| Embodiment 5 | 697 | 661 | 611 |
| Embodiment 6 | 772 | 736 | 686 |
| Embodiment 7 | 756 | 725 | 677 |
| Comparative example 1 | 680 | 644 | 594 |
Table 2
| Battery | Discharge capacity (mAh/g) first |
| Embodiment 1 | 349 |
| Embodiment 2 | 331 |
| Embodiment 3 | 321 |
| Embodiment 4 | 315 |
| Embodiment 5 | 310 |
| Embodiment 6 | 355 |
| Embodiment 7 | 346 |
| Comparative example 1 | 303 |
Table 3
| Battery | Capacity (mAh/g) first | Capacity (mAh/g) after 100 circulations |
| Embodiment 1 | 767 | 743 |
| Embodiment 2 | 754 | 700 |
| Embodiment 3 | 727 | 687 |
| Embodiment 4 | 733 | 651 |
| Embodiment 5 | 706 | 661 |
| Embodiment 6 | 781 | 741 |
| Embodiment 7 | 763 | 737 |
| Comparative example 1 | 694 | 555 |
Binders for electrodes of the present invention, well can be applied to lithium ion cell electrode, significantly improves the caking property between electrode slurry, improve the stability of electrode slurry simultaneously, electrode slurry good dispersion, should not reunite and stick vessel, is easy to store and slurry, optimize explained hereafter, the rheological characteristic of slurry is good, improves the coating property of slurry, can thickness be prepared evenly pole piece, improve the utilance of battery with two side terminals and pole piece, reduce production cost.The electrode plates pliability of preparation is higher, and the specific capacity first of battery, multiplying power discharging property and cycle performance are obtained for and significantly improve.For the development of lithium ion battery is laid a good foundation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a lithium ion battery electrode sizing agent, is characterized in that, comprises lithium ion battery electrode material and solvent, wherein also comprises polyethylene glycol;
Described lithium ion battery electrode material comprises electrode active material and binding agent, and described electrode active material is positive electrode active materials and/or negative active core-shell material, wherein also containing conductive agent;
Described binding agent comprises alginate propylene glycol or alginate and water-based binder, and described water-based binder is sodium carboxymethylcellulose and styrene-butadiene latex;
With the total amount of electrode slurry for benchmark, the weight percentage of described electrode active material is 35%-60%; The weight percentage of described binding agent is 0.5%-10%; The weight percentage of described polyethylene glycol is 0.5-3%; Weight hundred parts of content of described conductive agent are 0.2-5%; The weight percentage of described solvent is 30%-60%;
With the total amount of binding agent for benchmark, the weight percentage of described alginate propylene glycol or alginate is 0.5-30%; The weight percentage of described sodium carboxymethylcellulose is 15%-30%, and the weight percentage of styrene-butadiene latex is 45-75%.
2. lithium ion battery electrode sizing agent according to claim 1, is characterized in that, described alginate is selected from one or more in sodium alginate, potassium alginate or ammonium alginate.
3. lithium ion battery electrode sizing agent according to claim 1, is characterized in that, described solvent is water.
4. a lithium ion cell electrode, is characterized in that, described electrode is coated on electrode collector by the electrode slurry described in claim 1-3 any one, and drying, calendering prepare.
5. a lithium ion battery, is characterized in that, comprises battery container and the electrode group be sealed in this battery container and electrolyte; Described electrode group comprises positive pole, negative pole and the barrier film between positive pole and negative pole, and wherein, described positive pole and/or negative pole are lithium ion cell electrode according to claim 4.
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| CN103205219A (en) * | 2012-01-17 | 2013-07-17 | 中国科学院物理研究所 | High-performance adhesive and application thereof in electrode preparation |
| US20130252101A1 (en) * | 2012-03-21 | 2013-09-26 | University Of Southern California | Nanoporous silicon and lithium ion battery anodes formed therefrom |
| CN103839696A (en) * | 2012-11-23 | 2014-06-04 | 海洋王照明科技股份有限公司 | Graphene electrode plate, and preparation method and application thereof |
| CN104466187B (en) * | 2014-12-10 | 2017-09-22 | 东莞新能源科技有限公司 | A kind of anode electrode film and the lithium ion battery for applying the electrode film |
| CN106675449B (en) * | 2016-12-08 | 2018-06-05 | 长兴天晟能源科技有限公司 | A kind of lithium ion battery high safety negative electrode slurry binding agent |
| US20200099059A1 (en) * | 2016-12-29 | 2020-03-26 | Real Power Industrial Limited Company | Porous aluminum-foil anode and method for preparing same, and lithium secondary battery |
| JP2019008961A (en) * | 2017-06-23 | 2019-01-17 | Fdk株式会社 | Electrode plate and battery |
| US11108048B2 (en) | 2019-07-31 | 2021-08-31 | Ford Global Technologies, Llc | Anode binder composition for lithium ion battery performance |
| CN111600075A (en) * | 2020-05-06 | 2020-08-28 | 中国科学院高能物理研究所 | Method for improving electrolyte resistance of binder in lithium battery negative pole piece through irradiation |
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| JP2003217573A (en) * | 2002-01-22 | 2003-07-31 | Hitachi Powdered Metals Co Ltd | Slurry for forming negative electrode film of non- aqueous secondary battery and control method of slurry |
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| CN1091860A (en) * | 1993-03-03 | 1994-09-07 | 北京有色金属研究总院 | The negative electrode of secondary cell and preparation method thereof |
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| CN102237527A (en) | 2011-11-09 |
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