CN103606644A - Negative plate of lithium ion battery, diaphragm and manufacturing method of negative plate and diaphragm - Google Patents
Negative plate of lithium ion battery, diaphragm and manufacturing method of negative plate and diaphragm Download PDFInfo
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- CN103606644A CN103606644A CN201310518395.XA CN201310518395A CN103606644A CN 103606644 A CN103606644 A CN 103606644A CN 201310518395 A CN201310518395 A CN 201310518395A CN 103606644 A CN103606644 A CN 103606644A
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- lithium ion
- ion battery
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- lithium
- lithium metal
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 53
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 70
- 239000011149 active material Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 34
- 230000004888 barrier function Effects 0.000 claims description 31
- 230000002093 peripheral effect Effects 0.000 claims description 24
- 239000000853 adhesive Substances 0.000 claims description 15
- 230000001070 adhesive effect Effects 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 239000011737 fluorine Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 7
- 230000002427 irreversible effect Effects 0.000 abstract description 5
- 229910052718 tin Inorganic materials 0.000 abstract description 5
- 239000000758 substrate Substances 0.000 abstract 2
- 238000004090 dissolution Methods 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 19
- 239000000843 powder Substances 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 125000001979 organolithium group Chemical group 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003381 solubilizing effect Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
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Classifications
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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
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention specifically relates to a negative plate of a lithium ion battery, a diaphragm and manufacturing methods thereof. The negative plate of the lithium ion battery comprises a negative substrate. At least a surface of the negative substrate is uniformly coated with an active material layer which is characterized in that the surface of at least an active material layer is coated with lithium metal. When the negative plate is applied to a lithium ion battery, lithium metal is subjected to a dissolution reaction due to local battery theory. Simultaneously, a SEI film is generated on the surface of the active material layer of the negative plate, and a few lithium ions are embedded into the active material. Thus, capacity of the lithium ion battery is raised so as to overcome the problem that mismatching between capacity of the manufactured negative pole and capacity of a positive pole is caused and performance of the positive pole cannot be fully performed due to high irreversible capacity of materials such as Sn, Si and the like. Capacity of the lithium ion battery is raised greatly. Therefore, the negative plate can be adopted to raise capacity of the lithium ion battery.
Description
[technical field]
The invention belongs to the manufacture method technical field of lithium ion battery, relate in particular to a kind of negative plate, barrier film and both manufacture methods of lithium ion battery.
[background technology]
Lithium ion battery be a kind of have high voltage, energy density high, have extended cycle life and the Portable environmental-protection battery of the feature such as security performance is good, be widely used in the portable electric appts such as mobile phone, video tape recorder, panel computer and also obtained certain application in electric automobile field at present.But the microminiaturization along with portable electric appts, and the research and development of the powerful device such as electric automobile (EV) and hybrid-electric car (HEV) and application be subject to the attention of height, people require to have high power capacity and high-power characteristic to the lithium ion battery as power-supply system.
In order to reach high power capacity and high-power requirement, researcher has carried out large quantity research to lithium ion cell high-capacity negative material (as materials such as Sn, Si), for the cathode pole piece being made by high-capacity material such as Sn, Si, in the initial charge process of battery, owing to existing, compared with large irreversible capacity, consumed part lithium source, cause thus the performance of positive electrode not bring into play completely, thereby the capacity that makes battery has reduction significantly, cause the Efficiency Decreasing first of battery.
In order to reduce the loss because of the irreversible capacity caused battery capacity of lithium ion battery in initial charge process, improve the efficiency first of battery, at present more existing document patent reports some solutions.The Chinese patent application that for example publication number is 102916165A is mentioned in inert atmosphere, by organolithium spray solution or drip in negative plate surface, makes the lithium ion in organolithium solution be reduced into lithium metal and embed in negative plate, then dry negative plate.Although this invention is passed through even organolithium spray solution or is dripped the surface at negative plate, realized " wet method benefit lithium ", thereby while effectively avoiding dry method to mend lithium, metallic lithium powder is aerial floating, guarantee production safety, and the amount of mending lithium can be by the organolithium solution that sprays or drip time of amount, sprinkling or dropping accurately controlled, to reach the object of even benefit lithium, what prevent negative plate analyses lithium and distortion, improve the efficiency first of battery, and then improve the energy density of battery.But because the whole technical process of this method all will be carried out in inert atmosphere, cause complex procedures, harsh to environmental requirement, the cost of manufacture of increase cathode pole piece.
For another example the Chinese patent application that publication number is 103208612A is mentioned a kind of method to the two-sided continuous supplementation lithium of anode plate for lithium ionic cell powder, utilize filter screen vibration powder to make lithium powder can evenly, quantitatively, accurately be dispersed in two surfaces up and down of negative plate in conjunction with the principle of electrostatic effect, and through roll operation, the lithium powder of filling is compacted to pole piece surface, thereby anticathode sheet plays the effect of mending lithium.Although the method can play the effect of mending lithium, improve the capacity of battery, yet because lithium powder is lighter, in air, easily float, can cause larger potential safety hazard to operating personnel.
In addition, the Japanese patent application of application number JP2008038720 is mentioned and is utilized the method for vacuum evaporation at the surperficial evaporation layer of metal lithium layer of negative plate, although the Thickness Ratio metal lithium sheet of the lithium metal layer of evaporation is thin, yet in this process, the thickness of the lithium metal layer of evaporation is difficult to control, and whole process must be carried out under vacuum environment, evaporation efficiency is also lower, and the processing of follow-up pole piece is also more complicated, and manufacturing cost is higher.
In view of this, really be necessary to provide a kind of method of preparing high capacity lithium ion cells cathode sheet, the method dusty material at negative plate in negative pole manufacture process is inner, or the surface of negative plate directly adds the powder of a small amount of lithium metal, metal fillings, wire or metal wire, then with common operation equally after press polish and barrier film, positive plate is wound into battery core together, pack in common soft-package battery shell or in aluminum hull, inject afterwards electrolyte, after placing, lithium metal can be because of the principle generation solubilizing reaction of local cell, electrode material surface generates SEI film simultaneously, and and the lithium ion that has small part embeds the inside of active material, thereby improve the capacity of lithium ion battery, and in the time of can effectively avoiding utilizing lithium powder to mend lithium, lithium powder be aerial floats, and guarantees production safety, in whole preparation process, operation is simple, low to environmental requirement, cost is low, be applicable to enterprise produces.
[summary of the invention]
First technical problem that the present invention will solve is to provide a kind of negative plate of lithium ion battery, and it can improve the capacity of lithium ion battery.
Second technical problem that the present invention will solve is to provide a kind of barrier film of lithium ion battery, and simple to operate, it can improve the capacity of lithium ion battery.
Above-mentioned first technical problem solves by the following technical programs:
The negative plate of lithium ion battery comprises a negative pole collector plate, at least one surface of negative pole collector plate, is coated with active material layer, it is characterized in that, the surface of at least one active material layer is with lithium metal.
Described lithium metal be shaped as particle, thread or sheet.
Lithium metal thread or sheet is arranged in a plurality of triangles or square or rhombus or hexagon or horizontal line section or vertical line segment.
When lithium ion battery is used after negative plate of the present invention, lithium metal can be because of the principle generation solubilizing reaction of local cell, while is at the Surface Creation SEI film of the active material layer of negative plate, and the lithium ion that has small part embeds the inside of active material, thereby improve the capacity of lithium ion battery, to overcome because the materials such as Sn, Si exist larger irreversible capacity, and the negative pole of the manufacture causing was misfitted with mating of positive electrode capacity, cathode performance such as can not bring into play completely at the problem, makes the capacity of lithium ion battery obtain improving very significantly.Therefore, the present invention can improve the capacity of lithium ion battery.
The present invention also provides a kind of manufacture method of negative plate of lithium ion battery simultaneously, is specially: the surface-coated binding agent of at least one active material layer on negative pole collector plate, the lithium metal that then distributes on binding agent, exerts pressure by pair of rollers lithium metal.
The outer peripheral face of roller is processed through non-adhesive.
The outer peripheral face of pair roller carries out non-adhesive processing, specifically, use the outer peripheral face of fluororesin film parcel roller, or use the collar of being made by fluororesin to entangle the outer peripheral face of roller, or the formation fluorine resin film that is heating and curing after the suspension-turbid liquid that contains fluorinated resin particle in roller surface coating.
From such scheme, the manufacture method of the negative plate of lithium ion battery of the present invention, operation is simple.
Above-mentioned second technical problem solves by the following technical programs:
A barrier film for lithium ion battery, comprises barrier film matrix, it is characterized in that, in the one side of the relative negative plate of barrier film matrix with lithium metal.
Described lithium metal be shaped as particle, thread or sheet.
Lithium metal thread or sheet is arranged in a plurality of triangles or square or rhombus or hexagon or horizontal line section or vertical line segment.
When lithium ion battery is used after barrier film of the present invention, lithium metal can be because of the principle generation solubilizing reaction of local cell, while is at the Surface Creation SEI film of the active material layer of negative plate, and the lithium ion that has small part embeds the inside of active material, thereby improve the capacity of lithium ion battery, to overcome because the materials such as Sn, Si exist larger irreversible capacity, and the negative pole of the manufacture causing was misfitted with mating of positive electrode capacity, cathode performance such as can not bring into play completely at the problem, makes the capacity of lithium ion battery obtain improving very significantly.Therefore, the present invention can improve the capacity of lithium ion battery.Barrier film matrix can be the barrier film that current market exists, for example, and PP (polypropylene screen), PE(polyethylene film).I.e. application scheme is to add lithium metal on existing septate surface.
The present invention also provides a kind of manufacture method of barrier film of lithium ion battery simultaneously, is specially: at a coated with adhesive of the relative negative plate of barrier film matrix, the lithium metal that then distributes on binding agent, exerts pressure by pair of rollers lithium metal.
The outer peripheral face of roller is processed through non-adhesive.
The outer peripheral face of pair roller carries out non-adhesive processing, specifically, use the outer peripheral face of fluororesin film parcel roller, or use the collar of being made by fluororesin to entangle the outer peripheral face of roller, or the formation fluorine resin film that is heating and curing after the suspension-turbid liquid that contains fluorinated resin particle in roller surface coating.
From such scheme, the manufacture method of the barrier film of lithium ion battery of the present invention, operation is simple.
[accompanying drawing explanation]
Fig. 1 is the cutaway view of embodiment mono-negative plate;
Fig. 2 is the cutaway view of embodiment bis-barrier films;
Fig. 3 is a kind of arrangement schematic diagram of the lithium metal of negative plate or barrier film;
Fig. 4 is that the another kind of the lithium metal of negative plate or barrier film is arranged schematic diagram;
Fig. 5 is that the another kind of the lithium metal of negative plate or barrier film is arranged schematic diagram.
[embodiment]
Embodiment mono-
As shown in Figure 1, a kind of negative plate of lithium ion battery comprises negative pole collector plate 11, on two surfaces of negative pole collector plate, is coated with active material layer 12, and the surface of one of them active material layer is with lithium metal 2.
In the present embodiment, described lithium metal 2 be shaped as thread.As shown in Figure 3, lithium metal is arranged in a plurality of vertical line segments.
The manufacture method of above-mentioned negative plate, be specially: at the surface-coated binding agent of the above one of them active material layer of negative pole collector plate, then the lithium metal that distributes on binding agent, the pair of rollers lithium metal that uses outer peripheral face to process through non-adhesive is exerted pressure so that lithium metal is connected on active material layer better.
The outer peripheral face of pair roller carries out non-adhesive processing, specifically, use the outer peripheral face of fluororesin film parcel roller, or use the collar of being made by fluororesin to entangle the outer peripheral face of roller, or the formation fluorine resin film that is heating and curing after the suspension-turbid liquid that contains fluorinated resin particle in roller surface coating.
In manufacture process, the temperature that is coated with the negative pole collector plate of active material layer is controlled at 40-60 ℃ or/and the temperature of roller is controlled at 10-30 ℃.
Certainly, lithium metal can be arranged in other shapes; For example, as shown in Figure 4, lithium metal is arranged in a plurality of horizontal line sections; As shown in Figure 5, lithium metal is arranged in a plurality of rhombuses; Specifically a plurality of triangles or square or hexagon.
Embodiment bis-
As shown in Figure 2, a kind of barrier film of lithium ion battery, comprises barrier film matrix 21, it is characterized in that, in the one side of the relative negative plate of barrier film matrix 21 with lithium metal 2.
In the present embodiment, described lithium metal 2 be shaped as thread.As shown in Figure 3, lithium metal is arranged in a plurality of vertical line segments.
The manufacture method of above-mentioned negative plate, be specially: at a coated with adhesive of the relative negative plate of barrier film matrix, then the lithium metal that distributes on binding agent, the pair of rollers lithium metal that uses outer peripheral face to process through non-adhesive is exerted pressure so that lithium metal is connected on barrier film matrix better.
The outer peripheral face of pair roller carries out non-adhesive processing, specifically, use the outer peripheral face of fluororesin film parcel roller, or use the collar of being made by fluororesin to entangle the outer peripheral face of roller, or the formation fluorine resin film that is heating and curing after the suspension-turbid liquid that contains fluorinated resin particle in roller surface coating.
In manufacture process, the temperature of barrier film matrix is controlled at 40-60 ℃ or/and the temperature of roller is controlled at 10-30 ℃; To strengthen cohesive force.
Certainly, lithium metal can be arranged in other shapes; For example, as shown in Figure 4, lithium metal is arranged in a plurality of horizontal line sections; As shown in Figure 5, lithium metal is arranged in a plurality of rhombuses; Specifically a plurality of triangles or square or hexagon.
The present invention is not limited to above-described embodiment, based on simple replacement above-described embodiment, that do not make creative work, should belong to the scope that the present invention discloses.
Claims (12)
1. a negative plate for lithium ion battery, comprises negative pole collector plate, at least one surface of negative pole collector plate, is coated with active material layer, it is characterized in that, the surface of at least one active material layer is with lithium metal.
2. the negative plate of a kind of lithium ion battery according to claim 1, is characterized in that, described lithium metal be shaped as particle, thread or sheet.
3. the negative plate of a kind of lithium ion battery according to claim 2, is characterized in that, lithium metal thread or sheet is arranged in a plurality of triangles or square or rhombus or hexagon or horizontal line section or vertical line segment.
4. a manufacture method for the negative plate of lithium ion battery, is characterized in that, is specially: the surface-coated binding agent of at least one active material layer on negative pole collector plate, the lithium metal that then distributes on binding agent, exerts pressure by pair of rollers lithium metal.
5. the manufacture method of the negative plate of a kind of lithium ion battery according to claim 4, is characterized in that, the outer peripheral face of described roller is processed through non-adhesive.
6. the manufacture method of the negative plate of a kind of lithium ion battery according to claim 5, it is characterized in that, the outer peripheral face of pair roller carries out non-adhesive processing, specifically, use the outer peripheral face of fluororesin film parcel roller, or use the collar of being made by fluororesin to entangle the outer peripheral face of roller, or the formation fluorine resin film that is heating and curing after the suspension-turbid liquid that contains fluorinated resin particle in roller surface coating.
7. a barrier film for lithium ion battery, comprises barrier film matrix, it is characterized in that, in the one side of the relative negative plate of barrier film matrix with lithium metal.
8. the barrier film of a kind of lithium ion battery according to claim 7, is characterized in that, described lithium metal be shaped as particle, thread or sheet.
9. the barrier film of a kind of lithium ion battery according to claim 8, is characterized in that, lithium metal thread or sheet is arranged in a plurality of triangles or square or rhombus or hexagon or horizontal line section or vertical line segment.
10. a manufacture method for the barrier film of the negative plate of lithium ion battery, is characterized in that, is specially: at a coated with adhesive of the relative negative plate of barrier film matrix, the lithium metal that then distributes on binding agent, exerts pressure by pair of rollers lithium metal.
The manufacture method of the barrier film of 11. a kind of lithium ion batteries according to claim 10, is characterized in that, the outer peripheral face of described roller is processed through non-adhesive.
The manufacture method of the barrier film of 12. a kind of lithium ion batteries according to claim 10, it is characterized in that, the outer peripheral face of pair roller carries out non-adhesive processing, specifically, use the outer peripheral face of fluororesin film parcel roller, or use the collar of being made by fluororesin to entangle the outer peripheral face of roller, or the formation fluorine resin film that is heating and curing after the suspension-turbid liquid that contains fluorinated resin particle in roller surface coating.
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| CN201310518395.XA CN103606644B (en) | 2013-10-28 | 2013-10-28 | The negative plate of lithium ion battery, barrier film and both manufacture methods |
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| CN201310518395.XA CN103606644B (en) | 2013-10-28 | 2013-10-28 | The negative plate of lithium ion battery, barrier film and both manufacture methods |
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| CN103606644B CN103606644B (en) | 2017-01-04 |
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| CN104681854A (en) * | 2015-02-26 | 2015-06-03 | 广东烛光新能源科技有限公司 | Naked cell, finished cell and preparation method of lithium-sulfur battery |
| CN104681855A (en) * | 2015-02-26 | 2015-06-03 | 广东烛光新能源科技有限公司 | Naked cell, finished cell and preparation method of lithium-sulfur battery |
| CN104882630A (en) * | 2015-04-01 | 2015-09-02 | 广东烛光新能源科技有限公司 | Bare electrical core of lithium ion battery, and preparation method for lithium ion battery containing bare electrical core |
| CN105932206A (en) * | 2016-07-13 | 2016-09-07 | 洛阳力容新能源科技有限公司 | Lithium supplement composite diaphragm, preparation method and application |
| CN106299214A (en) * | 2015-06-05 | 2017-01-04 | 东莞市亿顺新材料有限公司 | A kind of lithium ion battery and ceramic diaphragm thereof |
| CN106450481A (en) * | 2016-12-07 | 2017-02-22 | 清华大学深圳研究生院 | Lithium ion battery and preparation method thereof |
| CN108270037A (en) * | 2018-01-30 | 2018-07-10 | 惠州市柯比电子有限公司 | A kind of method for improving cell phone battery capacity stability |
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| CN111384405A (en) * | 2018-12-28 | 2020-07-07 | 宁德时代新能源科技股份有限公司 | Electrode assembly and lithium ion battery |
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| CN115051112A (en) * | 2022-07-12 | 2022-09-13 | 远景动力技术(江苏)有限公司 | Composite diaphragm and application thereof |
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Cited By (21)
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| CN108270037A (en) * | 2018-01-30 | 2018-07-10 | 惠州市柯比电子有限公司 | A kind of method for improving cell phone battery capacity stability |
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| CN109616612B (en) * | 2018-12-05 | 2020-09-01 | 珠海格力电器股份有限公司 | Electrode and lithium ion battery |
| CN111384405A (en) * | 2018-12-28 | 2020-07-07 | 宁德时代新能源科技股份有限公司 | Electrode assembly and lithium ion battery |
| CN111384405B (en) * | 2018-12-28 | 2021-11-09 | 宁德时代新能源科技股份有限公司 | Electrode assembly and lithium ion battery |
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| WO2021253318A1 (en) * | 2020-06-18 | 2021-12-23 | 天津中能锂业有限公司 | Ultrathin lithium bar preform, composite negative electrode, manufacturing method therefor, and battery |
| CN112038582A (en) * | 2020-10-10 | 2020-12-04 | 合肥国轩高科动力能源有限公司 | Lithium supplementing device and lithium supplementing method |
| CN115051112A (en) * | 2022-07-12 | 2022-09-13 | 远景动力技术(江苏)有限公司 | Composite diaphragm and application thereof |
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