CN104993097B - A kind of negative plate, the electrochemical energy storing device containing the negative plate and preparation method thereof - Google Patents
A kind of negative plate, the electrochemical energy storing device containing the negative plate and preparation method thereof Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention discloses a kind of negative plate：Including negative current collector and the negative electrode active material coating being distributed on the negative current collector, it is characterised in that：Compound porous coating is distributed with the negative electrode active material coating, hollow bead filler is included in the compound porous coating, the volume of the hollow parts of the hollow bead filler is 1% the 95% of the cumulative volume of the hollow bead filler；The shell parts of the hollow bead filler have a loose structure, and the porosity of the shell parts of the hollow bead filler is 1% 90%；The pressure that the hollow bead filler can bear is more than or equal to 0.05MPa.The hollow-core construction of hollow bead can store electrolyte, alleviate/solve the problems, such as the swollen liquid of battery；The electrolyte for being stored in hollow bead simultaneously can increase the ion conduction property of particle so that battery core has more preferable high rate performance；In addition the security performance of battery can also be improved.
Description
Technical field
The invention belongs to electrochemical energy storing device technical field, more particularly to a kind of negative plate and its contain the negative plate
The preparation method of electrochemical energy storing device.
Background technology
1991, the creative use Carbon Materials of Sony corporation of Japan, as lithium ion battery anode material, were lithium ion
Field of batteries brings revolutionary change；Since then, lithium ion battery technology fast development, mobile phone, video camera,
Largely used above notebook computer and other portable electronics.Lithium ion battery has many advantages, such as that such as voltage is high, body
Product small, light weight, memory-less effect higher than ability, pollution-free, self discharge is small, have extended cycle life, and is preferable 21st century
Movable electrical appliances power supply, electric car power supply and electricity storage station electrical storage device.However, the lifting of the consumption demand with people,
Its stand-by time to consumer electronics product requires more and more higher, and the volume capacity density to electronic product battery is carried accordingly
Requirement higher is gone out；Meanwhile, the lithium battery that electric automobile (EV) and energy-accumulating power station (ES) are used, single battery core has appearance higher
Amount and bigger volume size, once heating, ignition can produce serious consequence, so that preferably security.
At present, compacting of the mode including the new electrode material of exploitation, increasing electrode for improving battery core volume capacity density is close
Degree, the manufacturing process for improving battery core etc., it is a kind of simple and effective manner that electrode compacted density is increased among these；Solve battery core
The main path of safety issue has：The more reliable core strueture of design safety performance, the painting on electrode diaphragm or barrier film
Cover ceramic layer and replace traditional liquid electrolyte etc. using polymer dielectric, wherein coated ceramic layer technology is in existing electricity
Pond industry field is with more extensive.
However, with the raising of electrode compacted density, the porosity in electrode will be reduced gradually, for storing electrolyte
Space will tail off, but in order to ensure the cycle performance of battery, battery core reservoir quantity must keep constant, therefore will appear from " rise liquid " and ask
Topic, so that battery shows uneven, influence battery outward appearance is until turn into outward appearance bad product, this is showed especially in soft-package battery
For obvious.
In view of this, it is necessory to develop a kind of new negative plate, its security performance that can improve battery can be delayed again
Solution solves battery " rise liquid " problem.
The content of the invention
It is an object of the invention to：In view of the shortcomings of the prior art, a kind of negative pole for providing：Including negative current collector and
It is distributed in the negative electrode active material coating on the negative current collector, it is characterised in that：Divide on the negative electrode active material coating
Compound porous coating is furnished with, hollow bead filler, the hollow part of the hollow bead filler are included in the compound porous coating
The volume divided is the 1%-95% of the cumulative volume of the hollow bead filler；The shell parts of the hollow bead filler have porous
Structure, and the porosity of the shell parts of the hollow bead filler is 1%-90%；The hollow bead filler can bear
Pressure be more than or equal to 0.05MPa.The hollow-core construction of hollow bead can store electrolyte, alleviate/solve the swollen liquid of battery
Problem；The electrolyte for being stored in hollow bead simultaneously can increase the ion conduction property of particle so that battery core has more preferable
High rate performance；In addition the security performance of battery can also be improved.
In order to achieve the above object, the present invention is adopted the following technical scheme that：
A kind of electrochemical energy storing device negative plate, including negative current collector and be distributed in negative on the negative current collector
Pole coating layer of active substance, is distributed with compound porous coating on the negative electrode active material coating, wrapped in the compound porous coating
Filler containing hollow bead, the volume of the hollow parts of the hollow bead filler is the cumulative volume of the hollow bead filler
1%-95%；The shell parts of the hollow bead filler have a loose structure, and the shell parts of the hollow bead filler
Porosity is 1%-90%；The pressure that the hollow bead filler can bear is more than or equal to 0.05MPa.
Improved as one kind of electrochemical energy storing device negative plate of the present invention, the hollow bead filler is selected from inorganic particulate
Grain or/and organic granular, the particle diameter of the hollow bead filler are less than or equal to 10 μm.
Improved as one kind of electrochemical energy storing device negative plate of the present invention, it is big that the inorganic particle is selected from Rockwell hardness
Inorganic salts (such as magnesium sulfate, barium titanate, lithium sulfate), Rockwell hardness in 2 more than 2 metal oxide (such as alundum (Al2O3),
Silica, calcium oxide etc.) at least one；The particle diameter of the inorganic particle is less than or equal to 4 μm.
As electrochemical energy storing device negative plate of the present invention one kind improve, the organic granular be selected from have lead lithium from
The polymer of polymer (polyethers, polyester, polyimides, poly- decanedioic acid ethylene glycol), fusing point more than or equal to 200 DEG C of sub- ability
(makrolon, polyphenylene sulfide, polypropylene cyanogen etc.), flame-retardant polymer (such as polypropylene flame redardant, flame retardant polyurethane, flame-proof ethylene-vinegar
Vinyl acetate copolymer etc.) at least one；The particle diameter of the organic granular is less than or equal to 4 μm.
Improved as one kind of electrochemical energy storing device negative plate of the present invention, the hollow parts of the hollow bead filler
Volume be the hollow bead filler cumulative volume 10%-80%；The porosity of the shell parts of the hollow bead filler
It is 10%-70%.
Improved as one kind of electrochemical energy storing device negative plate of the present invention, what the hollow bead filler can bear
Pressure is more than or equal to 0.2MPa.
Improved as one kind of electrochemical energy storing device negative plate of the present invention, the thickness of the compound porous coating is
0.5μm-15μm；The quality of the hollow bead filler is the 0.5%-99.6% of the quality of the compound porous coating；It is described
Also contain bonding agent or/and full particle in compound porous coating.
Improved as one kind of electrochemical energy storing device negative plate of the present invention, the negative electrode active material one side coating
Thickness is 10 μm -500 μm；The negative electrode active material of the negative electrode active material coating is selected from carbon material (graphite, disordered carbon), contains
Carbon compound (B~C~N series, C~Si~O series), non-carbon material (metal oxide, lithium~transition metal nitride, lithium
Alloy) at least one.
The present invention includes a kind of electrochemical energy storing device, the negative plate usage right requirement 1 of the electrochemical energy storing device
To the negative plate described in 8 any one；The electrochemical energy storing device is included in lithium ion battery, lithium-sulfur cell, sodium-ion battery
One kind.
Present invention additionally comprises a kind of preparation method of electrochemical energy storing device, mainly comprise the following steps：
It is prepared by step 1, initial negative plate：By the well mixed configuration of negative electrode active material, conductive agent, bonding agent and solvent
Cathode size is obtained, is coated in afterwards on negative current collector and is obtained initial negative plate；
Step 2, slurry configuration：By porous aggregate, solvent, that bonding agent is configured to slurry is stand-by；
It is prepared by step 3, negative plate：Above-mentioned slurry is arranged at least one surface of above-mentioned initial negative plate, is removed molten
Agent is to obtain negative plate；
It is prepared by step 4, electrochemical energy storing device：Above-mentioned negative plate is assembled together with positive plate, barrier film and obtains naked electricity
Core, enters shell/enter bag afterwards, and fluid injection, chemical conversion, shaping obtain finished product electrochemical energy storing device.
Compared with prior art, composite porous isolating membrane of the present invention has the following advantages that：
Firstly, since contain inorganic particles packing in the negative plate top layer film overlay, when there is abuse, even if battery core reaches
To higher temperature, inorganic particle can still keep itself performance, the function of intercepting both positive and negative polarity short circuit be played, so as to improve electricity
Pond security performance.
Secondly, Hollow Inorganic particle hollow parts volume can be as the space of storage electrolyte, so as to alleviate or solve
Battery rises liquid problem.
3rd, the shell of Hollow Inorganic particle is loose structure, is easy to electrolyte to pass in and out the particle, so as to shorten electrolyte
Detour the transmission path of full particle, improves the high rate performance of battery core.
Finally, method of the present invention simple possible is prepared, is easy to industrialized production.
Specific embodiment
Below with reference to electrochemical energy storing device of the specific embodiment to negative plate of the present invention and its containing the negative plate
Preparation method is described in further detail, but embodiments of the present invention not limited to this.
Comparative example 1
It is prepared by negative plate：With graphite as negative electrode active material, SBR as bonding agent, S μ pper-P be conductive agent prepare slurry,
Wherein, the mass ratio of negative electrode active material, bonding agent and conductive agent is 96:2:2, cathode size is coated in above-mentioned Copper Foil
On, the pole piece that one side applied thickness is 60 μm is obtained after colding pressing stand-by；
Comparative example 2,
It is prepared by initial negative plate：Prepared with the negative plate of comparative example 1；
Slurry is configured：Slurry is configured：Selection particle diameter is 1 μm, bearing capacity is for the alundum (Al2O3) full particle of 30MPa is
Filler, water are solvent, PVDF is bonding agent, and the solid content of alundum (Al2O3) is 98%, is mixed into slurry stand-by；
It is prepared by negative plate：By two surfaces of above-mentioned slurry intaglio printing to above-mentioned initial negative plate, wherein one side intaglio plate
Thickness degree is 4 μm；It is stand-by that drying postscript obtains composite negative plate.
Embodiment 1,
It is prepared by initial negative plate：Prepared with the negative plate of comparative example 1；
Slurry is configured：Selection particle diameter is 1 μm, bearing capacity is 3MPa, hollow parts volume of the total volume 60%, shell
Porosity be 50% alundum (Al2O3) hollow bead be filler, water be that solvent, PVDF are bonding agent, and hollow alundum (Al2O3)
Solid content be 98%, be mixed into slurry stand-by；
It is prepared by negative plate：By two surfaces of above-mentioned slurry intaglio printing to above-mentioned initial negative plate, wherein one side intaglio plate
Thickness degree is 4 μm；It is stand-by that drying postscript obtains composite negative plate.
Embodiment 2,
Difference from Example 1 is, the selected hollow alundum (Al2O3) particle hollow parts volume of the present embodiment
The ratio for accounting for particle overall volume is 1%；
Remaining is same as Example 1, repeats no more.
Embodiment 3,
Difference from Example 1 is, the selected hollow alundum (Al2O3) particle hollow parts volume of the present embodiment
The ratio for accounting for particle overall volume is 10%；
Remaining is same as Example 1, repeats no more.
Embodiment 4,
Difference from Example 1 is, the selected hollow alundum (Al2O3) particle hollow parts volume of the present embodiment
The ratio for accounting for particle overall volume is 80%；
Remaining is same as Example 1, repeats no more.
Embodiment 5,
Difference from Example 1 is, the selected hollow alundum (Al2O3) particle hollow parts volume of the present embodiment
The ratio for accounting for particle overall volume is 95%；
Remaining is same as Example 1, repeats no more.
Embodiment 6,
Difference from Example 1 is that the selected hollow alundum (Al2O3) shell porosity of the present embodiment is
1%；
Remaining is same as Example 1, repeats no more.
Embodiment 7,
Difference from Example 1 is that the selected hollow alundum (Al2O3) shell porosity of the present embodiment is
10%；
Remaining is same as Example 1, repeats no more.
Embodiment 8,
Difference from Example 1 is that the selected hollow alundum (Al2O3) shell porosity of the present embodiment is
70%；
Remaining is same as Example 1, repeats no more.
Embodiment 9,
Difference from Example 1 is that the selected hollow alundum (Al2O3) shell porosity of the present embodiment is
90%；
Remaining is same as Example 1, repeats no more.
Embodiment 10,
It is prepared by initial negative plate：With silicon as negative electrode active material, PAN as bonding agent, S μ pper-P be conductive agent match somebody with somebody slurrying
Material, wherein, the mass ratio of negative electrode active material, bonding agent and conductive agent is 94:4:2, cathode size is coated in above-mentioned copper
On paper tinsel, the pole piece that one side applied thickness is 10 μm is obtained after colding pressing stand-by；
Slurry is configured：Selection particle diameter is 4 μm, bearing capacity is 4MPa, hollow parts volume of the total volume 60%, shell
Porosity be 50% silica hollow bead be filler, water be that solvent, PVDF are bonding agent, and hollow alundum (Al2O3) is consolidated
Content is 0.5%, and solid barium titanate solid content is 95%, and to be mixed into slurry stand-by for 4.5% for bonding agent solid content；
It is prepared by negative plate：The transfer of above-mentioned slurry is coated to two surfaces of above-mentioned initial negative plate, wherein one side coating
Thickness is 10 μm；Composite negative plate is obtained after drying.
Embodiment 11,
It is prepared by initial negative plate：With lithium titanate as negative electrode active material, SBR as bonding agent, S μ pper-P match somebody with somebody for conductive agent
Slurrying material, wherein, the mass ratio of negative electrode active material, bonding agent and conductive agent is 92:5:3, cathode size is coated in
State on Copper Foil, the pole piece that one side applied thickness is 500 μm is obtained after colding pressing stand-by；
Slurry is configured：Selection particle diameter be 10 μm, bearing capacity be 0.4MPa, hollow parts volume of the total volume 60%,
Shell porosity be 15% polyphenylene sulfide hollow bead be filler, water be that solvent, SBR are bonding agent, and hollow polyphenylene sulfide
Solid content be 99.5%, to be mixed into slurry stand-by for 0.5% for bonding agent solid content；
It is prepared by negative plate：The transfer of above-mentioned slurry is coated to two surfaces of above-mentioned initial negative plate, wherein one side coating
Thickness is 15 μm；Composite negative plate is obtained after drying.
Embodiment 12,
It is prepared by initial negative plate：With graphite, (mass ratio is 70 with silicon:30) be negative electrode active material, SBR be bonding agent, S μ
Pper-P is that conductive agent prepares slurry, wherein, the mass ratio of negative electrode active material, bonding agent and conductive agent is 95:3:2, will
Cathode size is coated on above-mentioned Copper Foil, the pole piece that one side applied thickness is 40 μm is obtained after colding pressing stand-by；
Slurry is configured：Selection particle diameter be 0.1 μm, bearing capacity be 0.8MPa, hollow parts volume of the total volume 60%,
Shell porosity be 20% polypropylene flame redardant hollow bead be filler, water be that solvent, SBR are bonding agent, it is and hollow fire-retardant poly-
The solid content of propylene is 70%, and the solid content of solid polyimides is 27%, and to be mixed into slurry stand-by for 3% for bonding agent solid content；
It is prepared by negative plate：The transfer of above-mentioned slurry is coated to two surfaces of above-mentioned initial negative plate, wherein one side coating
Thickness is 0.5 μm；Composite negative plate is obtained after drying.
Battery core is assembled：Selection cobalt acid lithium prepares anode pole piece for positive active material, afterwards barrier film and above-mentioned comparative example,
Negative plate in embodiment assembles obtain naked battery core respectively, and selection aluminum plastic film is that covering pack carries out closedtop, after drying according to
The fluid injection coefficient of 0.0021g/mAh carries out fluid injection；Liquid to be electrolysed is melted into after fully infiltrating, shaping, degasification obtain finished product electricity
Core, and control the electrolyte of battery core to possess coefficient for 0.0020g/mAh during degasification.
High rate performance is tested：By following flow to comparative example, embodiment 1- embodiments 10, embodiment 12 in 35 DEG C of environment
Battery core carry out multiplying power test：Stand 3min；0.5C constant-current charges are to 4.2V, constant-voltage charge to 0.05C；Stand 3min；0.2C
Constant-current discharge obtains discharge capacity D0 first to 3.0V；, to 4.2V, constant-voltage charge is extremely for 0.5C constant-current charges after standing 3min
0.05C；Stand 3min；2C constant-current discharges complete test after obtaining discharge capacity D1 first to 3.0V, then the high rate performance of battery
=D1/D0 × 100%.
Multiplying power test is carried out to the battery core of embodiment 11 by following flow in 35 DEG C of environment：Stand 3min；0.5C constant currents
Charge to 3.0V, constant-voltage charge to 0.05C；Stand 3min；0.2C constant-current discharges obtain discharge capacity D0 first to 1.8V；Stand
0.5C constant-current charges are to 3.0V, constant-voltage charge to 0.05C after 3min；Stand 3min；2C constant-current discharges are obtained first to 1.8V
Test is completed after discharge capacity D1, then high rate performance=D1/D0 × 100% of battery.
Drift bolt is tested：The battery core of each embodiment and comparative example is completely filled by following flow in 35 DEG C of environment：Stand 3min；
0.5C constant-current charges are to 4.2V (wherein the constant-current charge of embodiment 11 to 3.0V), constant-voltage charge to 0.05C；It is fixed in afterwards
On special drift bolt fixture, using the iron nail of a diameter of 2.5mm, with the speed of 10mm/s through battery core center, statistics battery core
Fiery quantity.
Rise liquid battery core ration statisticses：The battery core 50 that each embodiment isolates film preparation with comparative example is taken, its surface is counted
The number of uneven point, wherein concave point number are not less than 2 and are designated as the liquid that rises, otherwise it is assumed that the liquid that do not rise.
According to the data of table 1, can obtain, when negative pole coating shows one layer of composite bed of coating, the battery that correspondence is prepared
With extraordinary security performance；Comparative examples 2 can be obtained with embodiment 1- embodiments 5, improve hollow bead hollow part split
Product ratio can effectively improve the high rate performance of battery, while the liquid that rises of battery is solved the problems, such as, but when hollow bead is hollow
During partial volume excessive (95%), particle bearing capacity is too poor, is easily broken, therefore will influence the performance of battery safety；
Comparative examples 2 can be obtained with embodiment 1, embodiment 6- embodiments 9, improve hollow bead shell porosity, can effectively be carried
The high rate performance of battery high, while solving the problems, such as the liquid that rises of battery.
Battery core test result in table 1, comparative example and embodiment
The announcement and teaching of book according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula carries out appropriate change and modification.Therefore, the invention is not limited in specific embodiment disclosed and described above, to this
Some modifications and changes of invention should also be as falling into scope of the claims of the invention.Although additionally, this specification
In used some specific terms, but these terms are merely for convenience of description, do not constitute any limitation to the present invention.
Claims (9)
1. a kind of electrochemical energy storing device negative plate, including negative current collector and the negative pole being distributed on the negative current collector
Coating layer of active substance, it is characterised in that：Compound porous coating is distributed with the negative electrode active material coating, it is described compound porous
Hollow bead filler is included in coating, the volume of the hollow parts of the hollow bead filler is the total of the hollow bead filler
The 1%-95% of volume；The shell parts of the hollow bead filler have a loose structure, and the hollow bead filler shell
Partial porosity is 1%-90%；The pressure that the hollow bead filler can bear is more than or equal to 0.05MPa；
The hollow bead filler is selected from inorganic particle or/and organic granular, and the particle diameter of the hollow bead filler is less than or waits
In 10 μm；
The inorganic particle is selected from least in magnesium sulfate, barium titanate, lithium sulfate, alundum (Al2O3), silica, calcium oxide
Kind；
The organic granular is selected to have leads the polymer of the polymer of lithium ion ability, fusing point more than or equal to 200 DEG C, fire-retardant
At least one in polymer；
It is at least one in polyethers, polyester, polyimides, poly- decanedioic acid ethylene glycol with the polymer for leading lithium ion ability；
Polymer of the fusing point more than or equal to 200 DEG C is at least one in makrolon, polyphenylene sulfide, polypropylene cyanogen；
Flame-retardant polymer is at least one in polypropylene flame redardant, flame retardant polyurethane, flame-proof ethylene-vinyl acetate copolymer.
2. electrochemical energy storing device negative plate described in a kind of claim 1, it is characterised in that the Rockwell of the inorganic particle is hard
Degree is more than 2；The particle diameter of the inorganic particle is less than or equal to 4 μm.
3. electrochemical energy storing device negative plate described in a kind of claim 1, it is characterised in that the particle diameter of the organic granular is small
In or equal to 4 μm.
4. a kind of electrochemical energy storing device negative plate described in claim 1, it is characterised in that the sky of the hollow bead filler
The volume of center portion point is the 10%-80% of the cumulative volume of the hollow bead filler；The shell parts of the hollow bead filler
Porosity is 10%-70%.
5. electrochemical energy storing device negative plate described in a kind of claim 1, it is characterised in that the hollow bead filler can
The pressure for bearing is more than or equal to 0.2MPa.
6. a kind of electrochemical energy storing device negative plate described in claim 1, it is characterised in that the thickness of the compound porous coating
Spend is 0.5 μm -15 μm；The quality of the hollow bead filler is the 0.5%-99.6% of the quality of the compound porous coating；
Also contain bonding agent or/and full particle in the compound porous coating.
7. electrochemical energy storing device negative plate described in a kind of claim 1-6 any one, it is characterised in that the negative pole is lived
Property material one side coating thickness be 10 μm -500 μm；The negative electrode active material of the negative electrode active material coating is selected from carbon materials
At least one in material, carbon compound, non-carbon material.
8. a kind of electrochemical energy storing device, it is characterised in that the negative plate usage right requirement 1 of the electrochemical energy storing device to
Negative plate described in 7 any one；The electrochemical energy storing device is included in lithium ion battery, lithium-sulfur cell, sodium-ion battery
It is a kind of.
9. a kind of preparation method of the electrochemical energy storing device comprising negative plate described in claim 1, it is characterised in that main bag
Include following steps：
It is prepared by step 1, initial negative plate：The well mixed configuration of negative electrode active material, conductive agent, bonding agent and solvent is obtained
Cathode size, is coated in initial negative plate is obtained on negative current collector afterwards；
Step 2, slurry configuration：By hollow bead filler, solvent, that bonding agent is configured to slurry is stand-by；
It is prepared by step 3, negative plate：Above-mentioned slurry is arranged at least one surface of above-mentioned initial negative plate, removal solvent is
Obtain negative plate；
It is prepared by step 4, electrochemical energy storing device：Above-mentioned negative plate is assembled together with positive plate, barrier film and obtains naked battery core, it
After enter shell/enter bag, fluid injection, chemical conversion, shaping obtain finished product electrochemical energy storing device.
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| CN109994707B (en) * | 2017-12-29 | 2021-09-21 | 宁德时代新能源科技股份有限公司 | Positive plate, preparation method thereof and battery |
| CN113764839A (en) * | 2021-08-17 | 2021-12-07 | 珠海冠宇电池股份有限公司 | Pole piece and lithium battery |
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| CN1203563C (en) * | 2001-07-10 | 2005-05-25 | 松下电器产业株式会社 | Manufacturing method of base material for polar plate, manufacturing method of positive plate and alkaline storage battery |
| CN100541874C (en) * | 2005-03-02 | 2009-09-16 | 松下电器产业株式会社 | Lithium rechargeable battery and manufacture method thereof |
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| JP3371301B2 (en) * | 1994-01-31 | 2003-01-27 | ソニー株式会社 | Non-aqueous electrolyte secondary battery |
| JP2006310010A (en) * | 2005-04-27 | 2006-11-09 | Matsushita Electric Ind Co Ltd | Lithium ion secondary battery |
| JP5318356B2 (en) * | 2007-02-23 | 2013-10-16 | 三洋電機株式会社 | Nonaqueous electrolyte secondary battery |
| US8557437B2 (en) * | 2009-03-25 | 2013-10-15 | Tdk Corporation | Electrode comprising protective layer for lithium ion secondary battery and lithium ion secondary battery |
| CN101863518A (en) * | 2010-07-01 | 2010-10-20 | 上海应用技术学院 | Co3O4 nano hollow sphere material and preparation method and application thereof |
| WO2012049779A1 (en) * | 2010-10-15 | 2012-04-19 | トヨタ自動車株式会社 | Secondary battery |
| KR101494506B1 (en) * | 2011-05-06 | 2015-02-17 | 도요타 지도샤（주） | Lithium ion secondary cell |
| CN202905856U (en) * | 2012-10-17 | 2013-04-24 | 中国东方电气集团有限公司 | Negative electrode plate of lithium ion secondary battery |
| JP6316207B2 (en) * | 2012-12-12 | 2018-04-25 | エルジー・ケム・リミテッド | Secondary battery electrode, secondary battery including the same, and cable type secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1203563C (en) * | 2001-07-10 | 2005-05-25 | 松下电器产业株式会社 | Manufacturing method of base material for polar plate, manufacturing method of positive plate and alkaline storage battery |
| CN100541874C (en) * | 2005-03-02 | 2009-09-16 | 松下电器产业株式会社 | Lithium rechargeable battery and manufacture method thereof |
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