CN104979525A - Positive electrode sheet, electrochemical energy storage device containing positive electrode sheet, and preparation method of electrochemical energy storage device - Google Patents
Positive electrode sheet, electrochemical energy storage device containing positive electrode sheet, and preparation method of electrochemical energy storage device Download PDFInfo
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- CN104979525A CN104979525A CN201510274489.6A CN201510274489A CN104979525A CN 104979525 A CN104979525 A CN 104979525A CN 201510274489 A CN201510274489 A CN 201510274489A CN 104979525 A CN104979525 A CN 104979525A
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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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
- 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
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention discloses a negative electrode sheet, which comprises a negative electrode current collector and a negative electrode active substance coating distributed on the negative electrode current collector, wherein a composite porous coating is distributed on the negative electrode active substance coating and contains a hollow particle filler, the volume of the hollow part of the hollow particle filler accounts for 1-95% of the total volume of the hollow particle filler, the shell part of the hollow particle filler has a porous structure, the porosity of the shell part of the hollow particle filler is 1-90%, and the hollow particle filler can bear pressure of more than or equal to 0.05 MPa. According to the present invention, the hollow structure of the hollow particles can store the electrolyte so as to alleviate/solve the liquid swelling problem of the battery; with the electrolyte stored in the hollow particles, the ion conduction property of the particles can be increased, such that the electric core can have the good rate performance; and the safety of the battery can be improved.
Description
Technical field
The invention belongs to electrochemical energy storing device technical field, particularly the preparation method of a kind of positive plate and the electrochemical energy storing device containing this positive plate thereof.
Background technology
1991, the creationary employing Carbon Materials of Sony corporation of Japan as lithium ion battery anode material, for field of lithium ion battery brings revolutionary change; Since then, lithium ion battery technology fast development, uses in a large number on mobile phone, video camera, notebook computer and other portable electronics.Lithium ion battery has plurality of advantages, such as voltage is high, volume is little, quality is light, memory-less effect higher than ability, pollution-free, self discharge is little, have extended cycle life, and is 21st century desirable movable electrical appliances power supply, electric car power supply and electricity storage station electrical storage device.But along with the lifting of the consumption demand of people, its stand-by time to consumer electronics product requires more and more higher, has higher requirement accordingly to the volume capacity density of electronic product battery; Meanwhile, the lithium battery that electric automobile (EV) and energy-accumulating power station (ES) use, single battery core has higher capacity and larger volume size, once heating, ignition can produce serious consequence, thus needs better fail safe.
At present, the manufacturing process etc. that the mode improving battery core volume capacity density comprises the new electrode material of exploitation, adds the compacted density of large electrode, improves battery core, this wherein adds large electrode compacted density is simply a kind of and effective mode; The main path solving battery core safety issue has: the more reliable core strueture of design safety performance, coated ceramic layer and use polymer dielectric to replace traditional liquid electrolyte etc. on electrode diaphragm or barrier film, wherein coated ceramic layer technology is used more extensive in existing battery industry field.
But, along with the raising of electrode compacted density, porosity in electrode will reduce gradually, space for storing electrolyte will tail off, but in order to ensure the cycle performance of battery, battery core reservoir quantity must remain unchanged, therefore " rise liquid " problem will be there is, thus it is uneven to make battery show, affect battery outward appearance until become outward appearance bad product, this shows particularly evident in soft-package battery.
In view of this, a kind of new positive plate of necessary exploitation, it can improve the security performance of battery, can alleviate or solve again battery " rise liquid " problem.
Summary of the invention
The object of the invention is to: for the deficiencies in the prior art, and a kind of negative pole provided: comprise plus plate current-collecting body and be distributed in the positive active material coating on described plus plate current-collecting body, it is characterized in that: described positive active material coating is distributed with compound porous coating, comprise hollow bead filler in described compound porous coating, the volume of the hollow parts of described hollow bead filler is the 1%-95% of the cumulative volume of described hollow bead filler; The shell part of described hollow bead filler has loose structure, and the porosity of the shell part of hollow bead filler is 1%-90%; The pressure that described hollow bead filler can bear is more than or equal to 0.05MPa.The hollow-core construction of hollow bead can store electrolyte, alleviates/solve the swollen liquid problem of battery; The electrolyte simultaneously stored in hollow bead can increase the ion conduction property of particle, makes battery core have better high rate performance; In addition the security performance of battery can also be improved.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of electrochemical energy storing device positive plate, comprise plus plate current-collecting body and be distributed in the positive active material coating on described plus plate current-collecting body, described positive active material coating is distributed with compound porous coating, comprise hollow bead filler in described compound porous coating, the volume of the hollow parts of described hollow bead filler is the 1%-95% of the cumulative volume of described hollow bead filler; The shell part of described hollow bead filler has loose structure, and the porosity of the shell part of hollow bead filler is 1%-90%; The pressure that described hollow bead filler can bear is more than or equal to 0.05MPa.
One as electrochemical energy storing device positive plate of the present invention is improved, and described hollow bead filler is selected from inorganic particle or/and organic granular, and the particle diameter of described hollow bead filler is less than or equal to 10 μm.
One as electrochemical energy storing device positive plate of the present invention is improved, and described inorganic particle is selected from inorganic salts (as magnesium sulfate, barium titanate, lithium sulfate etc.), Rockwell hardness that Rockwell hardness is greater than 2 and is greater than at least one in the metal oxide (as alundum (Al2O3), silica, calcium oxide etc.) of 2; The particle diameter of described inorganic particle is less than or equal to 4 μm.
One as electrochemical energy storing device positive plate of the present invention is improved, and described organic granular is selected to be had polymer (polyethers, polyester, poly-imines, poly-decanedioic acid ethylene glycol), the fusing point of leading lithium ion ability and be more than or equal to the polymer (Merlon, polyphenylene sulfide, polypropylene cyanogen etc.) of 200 DEG C, at least one in flame-retardant polymer (as polypropylene flame redardant, flame retardant polyurethane, flame-proof ethylene-vinyl acetate copolymer etc.); The particle diameter of described organic granular is less than or equal to 4 μm.
One as electrochemical energy storing device positive plate of the present invention is improved, and the volume of the hollow parts of described hollow bead filler is the 10%-80% of the cumulative volume of described hollow bead filler; The porosity of the shell part of described hollow bead filler is 10%-70%;
One as electrochemical energy storing device positive plate of the present invention is improved, and the pressure that described hollow bead filler can bear is more than or equal to 0.2MPa.
One as electrochemical energy storing device positive plate of the present invention is improved, and the thickness of described compound porous coating is 0.5 μm-15 μm; The quality of described hollow bead filler is the 0.5%-99.6% of the quality of described compound porous coating; Bonding agent is also contained or/and full particle in described compound porous coating.
One as electrochemical energy storing device positive plate of the present invention is improved, and the thickness of described positive active material coating is 10 μm-500 μm; Positive active material in described positive active material coating is selected from lithium and cobalt oxides, lithium nickel oxide, lithium manganese oxide, oxide/lithium ferrite, lithium-barium oxide, sulphur or sulfide/sulfur compound cathode material, ternary or multiple elements design compound and polyanion cathode material (as LiMnPO
4, polyanionic orthosilicate etc.) at least one.
The present invention also comprises a kind of electrochemical energy storing device, and its positive plate uses positive plate of the present invention; Described electrochemical energy storing device comprises the one in lead-acid battery, Ni-MH battery, lithium ion battery, lithium-sulfur cell, sodium-ion battery.
The present invention also comprises a kind of preparation method of electrochemical energy storing device of positive plate, mainly comprises the steps:
Step 1, initial positive plate preparation: positive active material, conductive agent, bonding agent and solvent are evenly configured and obtains anode sizing agent, be coated in afterwards on plus plate current-collecting body and obtain initial positive plate;
Step 2, slurry configures: by hollow bead filler, solvent, that bonding agent is configured to slurry is stand-by;
Step 3, prepared by positive plate: slurry step 2 obtained is arranged at least one surface of above-mentioned initial positive plate, removes solvent and namely obtains positive plate;
Step 4, prepared by electrochemical energy storing device: assembled together with negative plate, barrier film by above-mentioned positive plate and obtain naked battery core, enters shell/enter bag afterwards, fluid injection, change into, shaping obtains finished product electrochemical energy storing device.
Compared with prior art, composite porous isolating membrane tool of the present invention has the following advantages:
First, owing to containing inorganic particles packing in this positive plate top layer film overlay, when there is abuse, even if battery core reaches higher temperature, inorganic particle still can keep itself performance, plays the function intercepting both positive and negative polarity short circuit, thus improves battery safety.
Secondly, hollow bead particle hollow parts volume can as the space storing electrolyte, the liquid problem thus alleviation or solution battery rise.
3rd, the shell of hollow bead particle is loose structure, is convenient to electrolyte and passes in and out this particle, thus shortening electrolyte detours, the transmission path of full particle, improves the high rate performance of battery core.
Finally, prepare method simple possible of the present invention, be convenient to suitability for industrialized production.
Embodiment
Below with reference to specific embodiment, the preparation method to positive plate of the present invention and the electrochemical energy storing device containing this positive plate thereof is described in further detail, but embodiments of the present invention are not limited thereto.
Comparative example 1
Prepared by positive plate: with cobalt acid lithium be positive active material, PVDF is bonding agent, S μ pper-P prepares slurry for conductive agent, wherein, the mass ratio of positive active material, bonding agent and conductive agent is 96:2:2, be coated in by cathode size on above-mentioned aluminium foil, obtaining one side applied thickness after colding pressing is that the pole piece of 60 μm is stand-by;
Comparative example 2,
Initial positive plate preparation: prepare with comparative example 1 positive plate;
Slurry configures: slurry configures: the alundum (Al2O3) full particle that selection particle diameter is 1 μm, bearing capacity is 30MPa is filler, water is solvent, PVDF is bonding agent, and the solid content of alundum (Al2O3) is 98%, is mixed into slurry stand-by;
Prepared by positive plate: by two surfaces of above-mentioned slurry intaglio printing to above-mentioned initial positive plate, wherein one side intaglio plate layer thickness is 4 μm; It is stand-by that oven dry postscript obtains anode composite sheet.
Embodiment 1,
Initial positive plate preparation: prepare with comparative example 1 positive plate;
Slurry configures: selection particle diameter is 1 μm, bearing capacity is 3MPa, hollow parts volume accounts for cumulative volume 60%, shell porosity is that the alundum (Al2O3) hollow bead of 50% is filler, water is solvent, PVDF is bonding agent, and the solid content of hollow alundum (Al2O3) is 98%, is mixed into slurry stand-by;
Prepared by positive plate: by two surfaces of above-mentioned slurry intaglio printing to above-mentioned initial positive plate, wherein one side intaglio plate layer thickness is 4 μm; It is stand-by that oven dry postscript obtains anode composite sheet.
Embodiment 2,
Difference from Example 1 is, the ratio that the hollow alundum (Al2O3) particle hollow parts volume selected by the present embodiment accounts for particle overall volume is 1%;
All the other are identical with embodiment 1, repeat no more.
Embodiment 3,
Difference from Example 1 is, the ratio that the hollow alundum (Al2O3) particle hollow parts volume selected by the present embodiment accounts for particle overall volume is 10%;
All the other are identical with embodiment 1, repeat no more.
Embodiment 4,
Difference from Example 1 is, the ratio that the hollow alundum (Al2O3) particle hollow parts volume selected by the present embodiment accounts for particle overall volume is 80%;
All the other are identical with embodiment 1, repeat no more.
Embodiment 5,
Difference from Example 1 is, the ratio that the hollow alundum (Al2O3) particle hollow parts volume selected by the present embodiment accounts for particle overall volume is 95%;
All the other are identical with embodiment 1, repeat no more.
Embodiment 6,
Difference from Example 1 is, the hollow alundum (Al2O3) shell porosity selected by the present embodiment is 1%;
All the other are identical with embodiment 1, repeat no more.
Embodiment 7,
Difference from Example 1 is, the hollow alundum (Al2O3) shell porosity selected by the present embodiment is 10%;
All the other are identical with embodiment 1, repeat no more.
Embodiment 8,
Difference from Example 1 is, the hollow alundum (Al2O3) shell porosity selected by the present embodiment is 70%;
All the other are identical with embodiment 1, repeat no more.
Embodiment 9,
Difference from Example 1 is, the hollow alundum (Al2O3) shell porosity selected by the present embodiment is 90%;
All the other are identical with embodiment 1, repeat no more.
Embodiment 10,
The preparation of initial positive plate: with sulphur carbon complex (sulfur content is for 70%) be positive active material, PVDF is bonding agent, S μ pper-P is conductive agent preparation slurry, wherein, the mass ratio of positive active material, bonding agent and conductive agent is 94:4:2, be coated in by anode sizing agent on above-mentioned aluminium foil, obtaining one side applied thickness after colding pressing is that the pole piece of 10 μm is stand-by;
Slurry configures: selection particle diameter is 4 μm, bearing capacity is 4MPa, hollow parts volume accounts for cumulative volume 60%, shell porosity is that the silica hollow bead of 50% is filler, water is solvent, PVDF is bonding agent, and the solid content of hollow alundum (Al2O3) is 0.5%, solid barium titanate solid content is 95%, and bonding agent solid content is that 4.5% to be mixed into slurry stand-by;
Prepared by positive plate: two surfaces above-mentioned slurry transfer being coated to above-mentioned initial positive plate, and wherein one side coating layer thickness is 10 μm; Anode composite sheet is obtained after oven dry.
Embodiment 11,
Initial positive plate preparation: take LiFePO4 as positive active material, PVDF is bonding agent, S μ pper-P prepares slurry for conductive agent, wherein, the mass ratio of positive active material, bonding agent and conductive agent is 94:3:2, be coated in by anode sizing agent on above-mentioned aluminium foil, obtaining one side applied thickness after colding pressing is that the pole piece of 500 μm is stand-by;
Slurry configures: selection particle diameter is 10 μm, bearing capacity is 0.4MPa, hollow parts volume accounts for cumulative volume 60%, shell porosity is that the polyphenylene sulfide hollow bead of 15% is filler, water is solvent, SBR is bonding agent, and the solid content of hollow polyphenylene sulfide is 99.5%, bonding agent solid content is that 0.5% to be mixed into slurry stand-by;
Prepared by positive plate: two surfaces above-mentioned slurry transfer being coated to above-mentioned initial positive plate, and wherein one side coating layer thickness is 15 μm; Anode composite sheet is obtained after oven dry.
Embodiment 12,
The preparation of initial positive plate: with lithium cobalt-manganese ternary material be positive active material, PVDF is bonding agent, S μ pper-P prepares slurry for conductive agent, wherein, the mass ratio of positive active material, bonding agent and conductive agent is 95:3:2, be coated in by anode sizing agent on above-mentioned aluminium foil, obtaining one side applied thickness after colding pressing is that the pole piece of 40 μm is stand-by;
Slurry configures: selection particle diameter is 0.1 μm, bearing capacity is 0.8MPa, hollow parts volume accounts for cumulative volume 60%, shell porosity is that the polypropylene flame redardant hollow bead of 20% is filler, water is solvent, SBR is bonding agent, and the solid content of hollow polypropylene flame redardant is 70%, the solid content of solid poly-imines is 27%, and bonding agent solid content is that 3% to be mixed into slurry stand-by;
Prepared by positive plate: two surfaces above-mentioned slurry transfer being coated to above-mentioned initial positive plate, and wherein one side coating layer thickness is 0.5 μm; Anode composite sheet is obtained after oven dry.
Battery core is assembled: select graphite to be that negative electrode active material prepares cathode pole piece, assemble respectively with the positive plate in barrier film and above-mentioned comparative example, embodiment (except embodiment 10) afterwards and obtain naked battery core, select aluminum plastic film to be that closedtop is carried out in covering pack, the fluid injection coefficient according to 0.0021g/mAh after drying carries out fluid injection; Carry out after liquid to be electrolysed fully infiltrates changing into, shaping, degasification obtain finished product battery core, and the electrolyte controlling battery core during degasification to possess coefficient be 0.0020g/mAh.
Battery is assembled: select graphite to be that negative electrode active material prepares cathode pole piece, the mode of metal lithium bands direct combination and electrode surface is adopted to carry out benefit lithium to graphite electrode after drying, obtain rich lithium cathode sheet, assemble with the positive plate in barrier film and embodiment 10 afterwards and obtain naked battery core, select aluminum plastic film to be that closedtop is carried out in covering pack, the fluid injection coefficient according to 0.0021g/mAh after drying carries out fluid injection; Carry out after liquid to be electrolysed fully infiltrates changing into, shaping, degasification obtain finished product battery core, and the electrolyte controlling battery core during degasification to possess coefficient be 0.0020g/mAh.
High rate performance is tested: in 35 DEG C of environment, carry out multiplying power test by the battery core of following flow process to comparative example, embodiment 1-embodiment 9, embodiment 11, embodiment 12: leave standstill 3min; 0.5C constant current charge is to 4.2V, and constant voltage charge is to 0.05C; Leave standstill 3min; 0.2C constant-current discharge obtains discharge capacity D0 first to 3.0V; After leaving standstill 3min, 0.5C constant current charge is to 4.2V, and constant voltage charge is to 0.05C; Leave standstill 3min; 2C constant-current discharge obtains completing test, then high rate performance=D1/D0 × 100% of battery after discharge capacity D1 first to 3.0V.
In 35 DEG C of environment, by following flow process, multiplying power test is carried out to the battery core of embodiment 10: leave standstill 3min; 0.5C constant current charge is to 2.8V, and constant voltage charge is to 0.05C; Leave standstill 3min; 0.2C constant-current discharge obtains discharge capacity D0 first to 1.5V; After leaving standstill 3min, 0.5C constant current charge is to 2.8V, and constant voltage charge is to 0.05C; Leave standstill 3min; 2C constant-current discharge obtains completing test, then high rate performance=D1/D0 × 100% of battery after discharge capacity D1 first to 1.5V.
Drift bolt is tested: completely fill by the battery core of following flow process by each embodiment and comparative example in 35 DEG C of environment: leave standstill 3min; 0.5C constant current charge is to 4.2V (wherein embodiment 11 constant current charge is to 2.8V), and constant voltage charge is to 0.05C; Be fixed on special drift bolt fixture afterwards, the iron nail that uses diameter to be 2.5mm, with the speed of 10mm/s through battery core central authorities, statistics battery core is caught fire quantity.
The liquid battery core that rises ration statistics: get battery core prepared by each embodiment and comparative example barrier film 50, add up the number of its surface irregularity point, wherein concave point number is not less than 2 and is designated as the liquid that rises, otherwise not think the liquid that rises.
Battery core test result in table 1, comparative example and embodiment
According to table 1 data, can obtain, when positive pole coating shows coating one deck composite bed, the battery that correspondence prepares has extraordinary security performance; But when composite coating thickness is less (0.5 μm), the security performance of battery core will be subject to impression.Comparative examples 2 and embodiment 1-embodiment 5 can obtain, improve the high rate performance that hollow bead hollow parts volume ratio effectively can improve battery, solve the liquid problem that rises of battery simultaneously, but when hollow bead hollow parts volume excessive (95%), particle bearing capacity is too poor, easily break, therefore will affect the performance of battery safety; Comparative examples 2 and embodiment 1, embodiment 6-embodiment 9 can obtain, and improve hollow bead shell porosity, effectively can improve the high rate performance of battery, solve the liquid problem that rises of battery simultaneously.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also carry out suitable change and amendment to above-mentioned execution mode.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. an electrochemical energy storing device positive plate, comprise plus plate current-collecting body and be distributed in the positive active material coating on described plus plate current-collecting body, it is characterized in that: described positive active material coating is distributed with compound porous coating, comprise hollow bead filler in described compound porous coating, the volume of the hollow parts of described hollow bead filler is the 1%-95% of the cumulative volume of described hollow bead filler; The shell part of described hollow bead filler has loose structure, and the porosity of the shell part of hollow bead filler is 1%-90%; The pressure that described hollow bead filler can bear is more than or equal to 0.05MPa.
2. an electrochemical energy storing device positive plate described in claim 1, is characterized in that, described hollow bead filler is selected from inorganic particle or/and organic granular, and the particle diameter of described hollow bead filler is less than or equal to 10 μm.
3. an electrochemical energy storing device positive plate described in claim 2, is characterized in that, described inorganic particle is selected from inorganic salts, Rockwell hardness that Rockwell hardness is greater than 2 and is greater than at least one in the metal oxide of 2; The particle diameter of described inorganic particle is less than or equal to 4 μm.
4. an electrochemical energy storing device positive plate described in claim 2, is characterized in that, described organic granular is selected to be had polymer, the fusing point of leading lithium ion ability and be more than or equal to the polymer of 200 DEG C, at least one in flame-retardant polymer; The particle diameter of described organic granular is less than or equal to 4 μm.
5. an electrochemical energy storing device positive plate described in claim 1, is characterized in that, the volume of the hollow parts of described hollow bead filler is the 10%-80% of the cumulative volume of described hollow bead filler; The porosity of the shell part of described hollow bead filler is 10%-70%.
6. an electrochemical energy storing device positive plate described in claim 1, is characterized in that, the pressure that described hollow bead filler can bear is more than or equal to 0.2MPa.
7. an electrochemical energy storing device positive plate described in claim 1, is characterized in that, the thickness of described compound porous coating is 0.5 μm-15 μm; The quality of described hollow bead filler is the 0.5%-99.6% of the quality of described compound porous coating; Bonding agent is also contained or/and full particle in described compound porous coating.
8. an electrochemical energy storing device positive plate described in claim 1-7 any one, is characterized in that, the thickness of described positive active material coating is 10 μm-500 μm; Positive active material in described positive active material coating is selected from least one in lithium and cobalt oxides, lithium nickel oxide, lithium manganese oxide, oxide/lithium ferrite, lithium-barium oxide, sulphur or sulfide/sulfur compound cathode material, ternary or multiple elements design compound and polyanion cathode material.
9. an electrochemical energy storing device, is characterized in that, the positive plate of described electrochemical energy storing device uses the positive plate described in any one of claim 1 to 8; Described electrochemical energy storing device comprises the one in lead-acid battery, Ni-MH battery, lithium ion battery, lithium-sulfur cell, sodium-ion battery.
10. comprise a preparation method for the electrochemical energy storing device of positive plate described in any one of claim 1 to 8, it is characterized in that, mainly comprise the steps:
Step 1, initial positive plate preparation: positive active material, conductive agent, bonding agent and solvent are evenly configured and obtains anode sizing agent, be coated in afterwards on plus plate current-collecting body and obtain initial positive plate;
Step 2, slurry configures: by hollow bead filler, solvent, that bonding agent is configured to slurry is stand-by;
Step 3, prepared by positive plate: slurry step 2 obtained is arranged at least one surface of above-mentioned initial positive plate, removes solvent and namely obtains positive plate;
Step 4, prepared by electrochemical energy storing device: assembled together with negative plate, barrier film by above-mentioned positive plate and obtain naked battery core, enters shell/enter bag afterwards, fluid injection, change into, shaping obtains finished product electrochemical energy storing device.
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| CN111799470A (en) * | 2019-04-08 | 2020-10-20 | 宁德时代新能源科技股份有限公司 | Positive pole piece and sodium ion battery |
| CN111799470B (en) * | 2019-04-08 | 2021-10-15 | 宁德时代新能源科技股份有限公司 | Positive pole piece and sodium ion battery |
| US20220200039A1 (en) * | 2020-12-21 | 2022-06-23 | GM Global Technology Operations LLC | Lithium battery including composite flame retardant particles |
| US11682787B2 (en) * | 2020-12-21 | 2023-06-20 | GM Global Technology Operations LLC | Lithium battery including composite particles with flame retardant material carried by particulate host material |
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