CN108832134A - A kind of flexible current-collecting body and preparation method thereof and the application in lithium ion battery - Google Patents
A kind of flexible current-collecting body and preparation method thereof and the application in lithium ion battery Download PDFInfo
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- CN108832134A CN108832134A CN201810691419.4A CN201810691419A CN108832134A CN 108832134 A CN108832134 A CN 108832134A CN 201810691419 A CN201810691419 A CN 201810691419A CN 108832134 A CN108832134 A CN 108832134A
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- collecting body
- flexible current
- coating
- preparation
- polymer film
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0421—Methods of deposition of the material involving vapour deposition
- H01M4/0423—Physical vapour deposition
- H01M4/0426—Sputtering
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- 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
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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
-
- 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
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a kind of preparation methods of flexible current-collecting body, it is characterised in that：Using thin polymer film as substrate, after surface treatment, using the method target of vacuum sputtering in thin polymer film two sides jet-plating metallization conductive coating, active material coating is coated in metallic conduction coating two sides later.Advantage is：With better flexibility and mechanical strength, folding line or brittle failure are not likely to produce in bending process；Thin polymer film has lower mass density as the material of substrate, can reduce battery overall quality, promotes battery energy density；While the polymer is with high temperature resistant, anti-oxidation, the cost of material is low, convenient for the advantage of large-scale production.
Description
Technical field
The present invention relates to technical field of lithium ion, relate to a kind of flexible current-collecting body, further relate to a kind of flexible current-collecting
The preparation method of body further relates to a kind of application of flexible current-collecting body in lithium ion battery.
Background technique
With the fast development of electronic technology, more and more electronic equipments are sent out towards lightening and flexibility direction
Exhibition, the various electronic devices with flexible, wearable property become research hotspot, such as Samsung and LG are proposed flexibility
Folding screen, and planning to release folding mobile phone products, the Intelligent bracelet that NIKE company releases, what Google released
The products such as intelligent glasses.Display component and circuit can all realize flexible and foldable that maximum challenge is exactly and such production at present
The matched accumulation power supply product that can be folded of product, traditional lithium battery are rigid, can not fold.And collector therein is made
For the component part of connection electrode in lithium battery and external circuit, have to the bendable folding endurance of battery, flexible aspect most important
Influence.As traditional electrode collector, plus plate current-collecting body is using aluminium foil, and thickness is between 12-20 μm, negative current collector
The copper foil of use, thickness is between 6-12 μm.Because the thickness of positive and negative anodes foil is thicker, the machining property of collector is poor,
It is more crisp to show as entirety, toughness is insufficient, when by external force bending, folding, can generate irreversible folding line or fracture, in turn
It influences battery performance or causes thermal runaway, it could even be possible to serious safety problem occurs.Simultaneously because foil thickness reason,
So that the quality of positive and negative anodes foil alsies occupy more ratio in entire battery, the energy density of battery is influenced, therefore
Thinner lighter current collector material or structure are all being pursued by many producers, reduce its quality, to effectively improve battery
Energy density.
Summary of the invention
The purpose of the present invention is：In view of the above deficiencies, provide a kind of flexible current-collecting body and preparation method thereof and lithium from
Application in sub- battery.
In order to achieve the above objectives, the technical solution adopted by the present invention is that：
A kind of flexible current-collecting body, the thin polymer film including being located at middle part, the thin polymer film two sides are led equipped with metal
Electrocoat, metallic conduction coating two sides are equipped with active material coating.
A kind of preparation method of flexible current-collecting body, using thin polymer film as substrate, after surface treatment, using true
The method target of sky sputtering is coated in metallic conduction coating two sides later in thin polymer film two sides jet-plating metallization conductive coating
Active material coating.
The thin polymer film be polypropylene, polyethylene, polyethylene terephthalate, polyacrylate,
One or more of polyacrylonitrile quasi polymer.
The material of the metallic conduction coating is one or more of iron, copper, zirconium, aluminium, nickel, tin, zinc.
The active material coating includes positive electrode active materials coating and negative electrode active material coating.
The flexible current-collecting body with a thickness of 5um-50um, the metallic conduction coating with a thickness of 200nm-5um.
The flexible current-collecting body with a thickness of 10um-30um, the metallic conduction coating with a thickness of 700nm-4um.
The surface density of the flexible current-collecting body is 0.1mg/cm2-10mg/cm2.
The surface density of the flexible current-collecting body is 1mg/cm2-5mg/cm2.
A kind of application of flexible current-collecting body in lithium ion battery, the anode for being constituted the flexible current-collecting body using diaphragm
Cathode separates lamination, is sealed to obtain lithium battery with aluminum plastic film after injecting electrolyte.
Compared with prior art, the present invention is achieved has the technical effect that：It is curved with better flexibility and mechanical strength
Folding line or brittle failure are not likely to produce during folding；Thin polymer film has lower mass density as the material of substrate, can drop
Low battery overall quality promotes battery energy density；While the polymer is with high temperature resistant, anti-oxidation, the cost of material is low, is convenient for
The advantage of large-scale production.
Detailed description of the invention
Fig. 1 is the electrode sections structural schematic diagram that flexible current-collecting body is constituted.
Fig. 2 is that flexible current-collecting body is assembled into cycle performance figure of the full battery under 1C multiplying power.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments：
Embodiment one：
As illustrated in fig. 1 and 2：A kind of flexible current-collecting body of the invention, the polymer poly Polypropylene film 1 including being located at middle part,
1 two sides of polymer poly Polypropylene film are equipped with aluminium conductive coating 2, and 2 two sides of aluminium conductive coating are equipped with active material coating
3。
A kind of preparation method of flexible current-collecting body, using polymer poly Polypropylene film as substrate, after surface treatment,
Using the method target of vacuum sputtering in polymer poly Polypropylene film two sides sputtering aluminum conductive coating, later in aluminium conductive coating
Two sides coat active material coating.
The active material coating includes positive electrode active materials coating and negative electrode active material coating.
Positive electrode active materials be cobalt acid lithium, LiMn2O4, LiFePO4, it is lithium-rich manganese-based, among nickel-cobalt-manganese ternary material one
Kind.
Negative electrode active material be graphite, lithium metal, lithium titanate, hard carbon, Si-C composite material one of.
The flexible current-collecting body with a thickness of 30um, the aluminium conductive coating with a thickness of 3um.
The surface density of the flexible current-collecting body is 2.5mg/cm2, and pole piece resistance is less than 35m Ω, and bending radius=30mm is curved
120 ° of bent angle is bent, resistance variations by 1000 times<1%, pole piece is without fracture and obvious folding line.
A kind of application of flexible current-collecting body in lithium ion battery, the anode for being constituted the flexible current-collecting body using diaphragm
Cathode separates lamination, is sealed to obtain lithium battery with aluminum plastic film after injecting electrolyte.
Compared with prior art, the present invention is achieved has the technical effect that：It is curved with better flexibility and mechanical strength
Folding line or brittle failure are not likely to produce during folding；Thin polymer film has lower mass density as the material of substrate, can drop
Low battery overall quality promotes battery energy density；While the polymer is with high temperature resistant, anti-oxidation, the cost of material is low, is convenient for
The advantage of large-scale production.
Embodiment two：
As illustrated in fig. 1 and 2：A kind of flexible current-collecting body of the invention, the polymer polyethylene film 1 including being located at middle part,
1 two sides of polymer polyethylene film are equipped with copper conductive coating 2, and 2 two sides of copper conductive coating are equipped with active material coating
3。
A kind of preparation method of flexible current-collecting body, using polymer polyethylene film as substrate, after surface treatment,
Using the method target of vacuum sputtering in polymer polyethylene film two sides sputter copper conductive coating, later in copper conductive coating
Two sides coat active material coating.
The active material coating includes positive electrode active materials coating and negative electrode active material coating.
Positive electrode active materials be cobalt acid lithium, LiMn2O4, LiFePO4, it is lithium-rich manganese-based, among nickel-cobalt-manganese ternary material one
Kind.
Negative electrode active material be graphite, lithium metal, lithium titanate, hard carbon, Si-C composite material one of.
The flexible current-collecting body with a thickness of 25um, the copper conductive coating with a thickness of 3um.
The surface density of the flexible current-collecting body is 4mg/cm2, and pole piece resistance is less than 30m Ω, bending radius=30mm, bending
It 120 ° of angle, is bent by 1000 times, resistance variations<1%, pole piece is without fracture and obvious folding line.
A kind of application of flexible current-collecting body in lithium ion battery, the anode for being constituted the flexible current-collecting body using diaphragm
Cathode separates lamination, is sealed to obtain lithium battery with aluminum plastic film after injecting electrolyte.
Compared with prior art, the present invention is achieved has the technical effect that：It is curved with better flexibility and mechanical strength
Folding line or brittle failure are not likely to produce during folding；Thin polymer film has lower mass density as the material of substrate, can drop
Low battery overall quality promotes battery energy density；While the polymer is with high temperature resistant, anti-oxidation, the cost of material is low, is convenient for
The advantage of large-scale production.
Embodiment three：
As illustrated in fig. 1 and 2：A kind of flexible current-collecting body of the invention, the polymer poly terephthalic acid (TPA) including being located at middle part
Glycol ester film 1,1 two sides of polymer pet film are equipped with nickel conductive coating 2, and the nickel is led
2 two sides of electrocoat are equipped with active material coating 3.
A kind of preparation method of flexible current-collecting body, using polymer pet film as substrate,
After surface treatment, splashed with target on polymer pet film two sides using the method for vacuum sputtering
Nickel plating conductive coating coats active material coating in nickel conductive coating two sides later.
The active material coating includes positive electrode active materials coating and negative electrode active material coating.
Positive electrode active materials be cobalt acid lithium, LiMn2O4, LiFePO4, it is lithium-rich manganese-based, among nickel-cobalt-manganese ternary material one
Kind.
Negative electrode active material be graphite, lithium metal, lithium titanate, hard carbon, Si-C composite material one of.
The flexible current-collecting body with a thickness of 25um, the nickel conductive coating with a thickness of 3um.
The surface density of the flexible current-collecting body is 3.7mg/cm2, and pole piece resistance is less than 30m Ω, and bending radius=30mm is curved
120 ° of bent angle is bent, resistance variations by 1000 times<1%, pole piece is without fracture and obvious folding line.
A kind of application of flexible current-collecting body in lithium ion battery, the anode for being constituted the flexible current-collecting body using diaphragm
Cathode separates lamination, is sealed to obtain lithium battery with aluminum plastic film after injecting electrolyte.
Compared with prior art, the present invention is achieved has the technical effect that：It is curved with better flexibility and mechanical strength
Folding line or brittle failure are not likely to produce during folding；Thin polymer film has lower mass density as the material of substrate, can drop
Low battery overall quality promotes battery energy density；While the polymer is with high temperature resistant, anti-oxidation, the cost of material is low, is convenient for
The advantage of large-scale production.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of flexible current-collecting body, it is characterised in that：Thin polymer film including being located at middle part, the thin polymer film two sides are set
There is metallic conduction coating, metallic conduction coating two sides are equipped with active material coating.
2. a kind of preparation method of flexible current-collecting body according to claim 1, it is characterised in that：Made using thin polymer film
It is applied using the method target of vacuum sputtering in thin polymer film two sides jet-plating metallization conduction after surface treatment for substrate
Layer coats active material coating in metallic conduction coating two sides later.
3. a kind of preparation method of flexible current-collecting body according to claim 2, it is characterised in that：The polymer
Film is one of polypropylene, polyethylene, polyethylene terephthalate, polyacrylate, polyacrylonitrile quasi polymer
Or it is several.
4. a kind of preparation method of flexible current-collecting body according to claim 2, it is characterised in that：The metallic conduction coating
Material be one or more of iron, copper, zirconium, aluminium, nickel, tin, zinc.
5. a kind of preparation method of flexible current-collecting body according to claim 2, it is characterised in that：The active material coating
Including positive electrode active materials coating and negative electrode active material coating.
6. a kind of preparation method of flexible current-collecting body according to claim 2, it is characterised in that：The flexible current-collecting body
With a thickness of 5um-50um, the metallic conduction coating with a thickness of 200nm-5um.
7. a kind of preparation method of flexible current-collecting body according to claim 6, it is characterised in that：The flexible current-collecting body
With a thickness of 10um-30um, the metallic conduction coating with a thickness of 700nm-4um.
8. a kind of preparation method of flexible current-collecting body according to claim 2, it is characterised in that：The flexible current-collecting body
Surface density is 0.1mg/cm2-10mg/cm2.
9. a kind of preparation method of flexible current-collecting body according to claim 8, it is characterised in that：The flexible current-collecting
The surface density of body is 1mg/cm2-5mg/cm2.
10. a kind of application of flexible current-collecting body in lithium ion battery, it is characterised in that：Using diaphragm by the flexible current-collecting body
The positive cathode of composition separates lamination, is sealed to obtain lithium battery with aluminum plastic film after injecting electrolyte.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810691419.4A CN108832134A (en) | 2018-06-28 | 2018-06-28 | A kind of flexible current-collecting body and preparation method thereof and the application in lithium ion battery |
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| CN201810691419.4A CN108832134A (en) | 2018-06-28 | 2018-06-28 | A kind of flexible current-collecting body and preparation method thereof and the application in lithium ion battery |
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Family
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599563A (en) * | 2018-11-22 | 2019-04-09 | 欣旺达电子股份有限公司 | Affluxion body in lithium ion batteries and preparation method thereof |
| CN109698359A (en) * | 2018-11-26 | 2019-04-30 | 中航锂电技术研究院有限公司 | It is a kind of with electricity interconnection, the composite current collector and preparation method thereof of through-hole structure, battery pole piece and lithium ion battery |
| CN110380058A (en) * | 2019-07-29 | 2019-10-25 | 中国科学院宁波材料技术与工程研究所 | A kind of flexible current-collecting body and its preparation method and application |
| CN110943224A (en) * | 2019-04-28 | 2020-03-31 | 宁德时代新能源科技股份有限公司 | Negative current collector, negative pole piece and electrochemical device |
| CN110943215A (en) * | 2019-05-31 | 2020-03-31 | 宁德时代新能源科技股份有限公司 | Lithium ion secondary battery |
| CN111564639A (en) * | 2020-05-28 | 2020-08-21 | 贝特瑞新材料集团股份有限公司 | Lithium ion battery pole piece, preparation method and application thereof |
| WO2021000562A1 (en) * | 2019-07-01 | 2021-01-07 | 宁德时代新能源科技股份有限公司 | Positive electrode current collector, positive electrode plate, electrochemical apparatus and device thereof |
| CN113097493A (en) * | 2021-03-31 | 2021-07-09 | 珠海冠宇电池股份有限公司 | Preparation method of composite current collector and lithium ion battery |
| WO2021184497A1 (en) * | 2020-03-20 | 2021-09-23 | 宁德时代新能源科技股份有限公司 | Negative electrode tab, secondary battery, and device comprising secondary battery |
| CN114335561A (en) * | 2021-12-27 | 2022-04-12 | 上海恩捷新材料科技有限公司 | Polar current collector and preparation method thereof |
| EP3951958A4 (en) * | 2019-04-28 | 2022-05-18 | Contemporary Amperex Technology Co., Limited | Positive current collector, positive electrode plate, secondary battery, and device |
| EP3940817A4 (en) * | 2019-04-15 | 2022-05-25 | Contemporary Amperex Technology Co., Limited | Positive pole piece, electrochemical device and device |
| EP3975298A4 (en) * | 2020-04-17 | 2022-08-24 | Contemporary Amperex Technology Co., Limited | Negative electrode plate, secondary battery, and device thereof |
| CN115000418A (en) * | 2022-07-06 | 2022-09-02 | 远景动力技术(江苏)有限公司 | Uncoated composite current collector, preparation method thereof and lithium ion battery |
| US11611081B2 (en) | 2019-05-31 | 2023-03-21 | Contemporary Amperex Technology Co., Limited | Lithium ion secondary battery, battery core, negative electrode plate, and apparatus |
| WO2023142321A1 (en) * | 2022-01-27 | 2023-08-03 | 江阴纳力新材料科技有限公司 | Low-energy consumption method for preparing composite current collector |
| WO2023201846A1 (en) * | 2022-04-20 | 2023-10-26 | 江阴纳力新材料科技有限公司 | Positive electrode lithium-rich composite current collector, and preparation method therefor |
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| CN109599563A (en) * | 2018-11-22 | 2019-04-09 | 欣旺达电子股份有限公司 | Affluxion body in lithium ion batteries and preparation method thereof |
| CN109698359A (en) * | 2018-11-26 | 2019-04-30 | 中航锂电技术研究院有限公司 | It is a kind of with electricity interconnection, the composite current collector and preparation method thereof of through-hole structure, battery pole piece and lithium ion battery |
| EP3940817A4 (en) * | 2019-04-15 | 2022-05-25 | Contemporary Amperex Technology Co., Limited | Positive pole piece, electrochemical device and device |
| US11476469B2 (en) | 2019-04-28 | 2022-10-18 | Contemporary Amperex Technology Co., Limited | Negative current collector, negative electrode plate, electrochemical device, and apparatus |
| CN110943224A (en) * | 2019-04-28 | 2020-03-31 | 宁德时代新能源科技股份有限公司 | Negative current collector, negative pole piece and electrochemical device |
| EP3951958A4 (en) * | 2019-04-28 | 2022-05-18 | Contemporary Amperex Technology Co., Limited | Positive current collector, positive electrode plate, secondary battery, and device |
| CN110943224B (en) * | 2019-04-28 | 2020-11-24 | 宁德时代新能源科技股份有限公司 | Negative current collector, negative pole piece and electrochemical device |
| KR20210003896A (en) * | 2019-05-31 | 2021-01-12 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Lithium ion secondary battery |
| KR102600399B1 (en) * | 2019-05-31 | 2023-11-09 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Lithium-ion secondary battery |
| EP3796437A4 (en) * | 2019-05-31 | 2021-11-03 | Contemporary Amperex Technology Co., Limited | Lithium-ion secondary battery |
| JP2021530831A (en) * | 2019-05-31 | 2021-11-11 | 寧徳時代新能源科技股▲分▼有限公司Contemporary Amperex Technology Co., Limited | Lithium ion secondary battery |
| US11646424B2 (en) | 2019-05-31 | 2023-05-09 | Contemporary Amperex Technology Co., Limited | Lithium-ion secondary battery |
| CN110943215A (en) * | 2019-05-31 | 2020-03-31 | 宁德时代新能源科技股份有限公司 | Lithium ion secondary battery |
| US11611081B2 (en) | 2019-05-31 | 2023-03-21 | Contemporary Amperex Technology Co., Limited | Lithium ion secondary battery, battery core, negative electrode plate, and apparatus |
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Address after: 215000 3 floors of No. 3 Shengzhao Road, Kunshan Development Zone, Suzhou City, Jiangsu Province Applicant after: Suzhou Qingtao New Energy Technology Co., Ltd. Address before: 215000 Three Floors of Building 3, Dongchuang Science and Technology Center, No. 1 Hongfeng Road, Jinqian East Road Enterprise Science and Technology Park, Kunshan Development Zone, Suzhou City, Jiangsu Province Applicant before: Qing Tao (Kunshan) New Energy Material Research Institute Co., Ltd. |
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Application publication date: 20181116 |