CN111293261A - Single-layer PVDF battery diaphragm and preparation method thereof - Google Patents
Single-layer PVDF battery diaphragm and preparation method thereof Download PDFInfo
- Publication number
- CN111293261A CN111293261A CN202010123732.5A CN202010123732A CN111293261A CN 111293261 A CN111293261 A CN 111293261A CN 202010123732 A CN202010123732 A CN 202010123732A CN 111293261 A CN111293261 A CN 111293261A
- Authority
- CN
- China
- Prior art keywords
- coating
- pvdf
- layer
- base film
- polyvinylidene fluoride
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002033 PVDF binder Substances 0.000 title claims abstract description 57
- 229920002981 polyvinylidene fluoride Polymers 0.000 title claims abstract description 57
- 239000002356 single layer Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 45
- 238000000576 coating method Methods 0.000 claims abstract description 45
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 24
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims abstract description 20
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims abstract description 13
- 239000011247 coating layer Substances 0.000 claims abstract description 11
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims abstract description 10
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 229920001577 copolymer Polymers 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000007602 hot air drying Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 3
- 239000011245 gel electrolyte Substances 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- 239000003792 electrolyte Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
-
- 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
- H01M50/411—Organic 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
- 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
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Cell Separators (AREA)
Abstract
The invention discloses a single-layer PVDF battery diaphragm and a preparation method thereof, the single-layer PVDF battery diaphragm comprises a base film, a ceramic layer arranged at the lower end of the base film and a PVDF coating layer coated at the upper end of the base film, wherein the PVDF coating is prepared from the following raw materials in parts by mass: polyvinylidene fluoride W #85000.5-3.0Kg, polyvinylidene fluoride-hexafluoropropylene copolymer 3-6.5Kg, acetone 200-400Kg, n-propanol 7.5-15Kg, dimethyl carbonate 6-15Kg, cyclohexane 1-8Kg, and isopropanol 0.5-2 Kg. The invention has small thermal deformation, good thickness uniformity, bonding effect of gel electrolyte and good lithium ion conduction performance. The battery has good hardness, integral bonding and stable interface of the pole piece and the diaphragm; the gel locks the electrolyte, and the middle and later periods have good cyclicity; compared with the oil double-sided coating, the thickness of the oil double-sided coating is thinner, the liquid content is increased under the same volume, the wettability is good, the electricity storage capacity is obviously improved, and the safety factor is also obviously improved.
Description
Technical Field
The invention relates to the technical field of lithium ion battery diaphragms, in particular to a single-layer PVDF battery diaphragm and a preparation method thereof.
Background
With the development of economy in China, energy is effectively utilized, environmental pollution is reduced, and the country guides the insist cultivation industry to be combined with strengthening matching, and a whole vehicle is used as a faucet to cultivate and drive a power battery and the like to accelerate development. The development of new energy automobiles aims to reduce the fuel consumption of automobiles, relieve the contradiction between fuel supply and demand, reduce tail gas emission and improve the atmospheric environment, and the PVDF oily single-side coating technology is effectively applied to power and consumption soft package batteries, so that the safety, reliability and light weight of the batteries can be improved, and the rapid development and application of the soft package batteries are effectively promoted.
The existing coating technology mainly comprises:
firstly, water-based coating: the ceramic layer is complete, the heat is reduced, the thermal deformation is large, the thickness uniformity is poor, the binding power is low, and lithium ions cannot be conducted. The battery has general hardness, low capacity and local bonding, and stable interface of the pole piece and the diaphragm. The glue coating part is easy to be poor in liquid, poor in circulation in the middle and later stages and easy to crack.
Secondly, double-sided coating of oily PVDF: the ceramic layer is complete, the thermal shrinkage is small, the thermal deformation is small, the thickness uniformity is good, the gel electrolyte has a bonding effect, the battery hardness is good, the whole bonding is realized, and the interface of the pole piece and the diaphragm is stable. However, due to double-sided coating, the thickness increase has limitation, and the process requirements of individual batteries cannot be met.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a single-layer PVDF battery diaphragm and a preparation method thereof, compared with oily PVDF, the single-layer PVDF battery diaphragm has the advantages of thinner double-side coating thickness, increased liquid content under the same volume, good wettability, obviously improved electricity storage capacity and obviously improved safety factor.
In order to solve the technical problems, the invention adopts the following technical scheme:
one of the purposes of the invention is to provide a single-layer PVDF battery diaphragm, which comprises a base film, a ceramic layer arranged at the lower end of the base film and a single-layer PVDF coating layer coated at the upper end of the base film, wherein the PVDF coating is prepared from the following raw materials in parts by mass: polyvinylidene fluoride W #85000.5-3.0Kg, polyvinylidene fluoride-hexafluoropropylene copolymer 3-6.5Kg, acetone 200-400Kg, n-propanol 7.5-15Kg, dimethyl carbonate 6-15Kg, cyclohexane 1-8Kg and isopropanol 0.5-2 Kg.
Preferably, the thickness of the ceramic layer is 0.5-10 mm; the thickness of the single-layer PVDF coating layer is 0.5-5 mm.
Another object of the present invention is to provide a method for preparing the single-layer PVDF battery separator, comprising the steps of:
s1, preparing a PVDF coating: weighing polyvinylidene fluoride W #8500, polyvinylidene fluoride-hexafluoropropylene copolymer and acetone according to the formula ratio, adding into a stirring reaction kettle, heating for one hour through water at the temperature of 30-80 ℃ until the copolymer is completely dissolved, stirring for one hour through the stirring reaction kettle at normal temperature, adding quantitative n-propanol, dimethyl carbonate and cyclohexane, and stirring for one hour to obtain a finished product of the PVDF coating;
s2, coating: and (5) pumping the PVDF coating obtained in the step (S1) into a glue groove of a coating machine through a pipeline, coating the upper end of the base film at a coating speed of 5-15 m/min, and drying by using a proper amount of air flow and a proper amount of wind speed in the process of coating the coating machine.
Preferably, in step S1, the rotation speed of the stirring reaction kettle is 50-80 r/min.
Preferably, in step S2, in the tunnel-type hot air drying process, both the blowing frequency and the air draft frequency are 15 to 45 Hz.
The invention has the beneficial effects that: the thermal deformation is small, the thickness uniformity is good, the gel electrolyte has a bonding effect, and the lithium ion conduction performance is good; the battery has good hardness, integral bonding and stable interface of the pole piece and the diaphragm; the gel locks the electrolyte, and the middle and later periods have good cyclicity; compared with the oil double-sided coating, the thickness of the oil double-sided coating is thinner, the liquid content is increased under the same volume, the wettability is good, the electricity storage capacity is obviously improved, and the safety factor is also obviously improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a single-layer PVDF battery separator provided in an embodiment of the invention.
Description of reference numerals:
1-basal membrane, 2-ceramic layer, 3-PVDF coating layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The single-layer PVDF battery diaphragm comprises a base film 1, a ceramic layer 2 arranged at the lower end of the base film 1 and a PVDF coating layer 3 coated at the upper end of the base film 1, wherein the PVDF coating is prepared from the following raw materials in parts by mass: polyvinylidene fluoride W #85000.5-3.0Kg, polyvinylidene fluoride-hexafluoropropylene copolymer 3-6.5Kg, acetone 200-400Kg, n-propanol 7.5-15Kg, dimethyl carbonate 6-15Kg, cyclohexane 1-8Kg, and isopropanol 0.5-2 Kg.
Further, the thickness of the ceramic layer 2 is 0.5-10 mm; the thickness of the PVDF coating layer 3 is 0.5-5 mm.
The preparation method of the single-layer PVDF battery diaphragm comprises the following steps:
s1, preparing a PVDF coating: weighing polyvinylidene fluoride W #8500, polyvinylidene fluoride-hexafluoropropylene copolymer and acetone according to the formula ratio, adding the copolymer and the acetone into a stirring reaction kettle, heating the mixture for one hour at the temperature of 30-80 ℃ until the copolymer and the acetone are completely dissolved, stirring the mixture for one hour at normal temperature in the stirring reaction kettle, adding quantitative n-propanol, dimethyl carbonate and cyclohexane, and stirring the mixture for one hour to obtain a single-layer PVDF coating finished product;
s2, coating: and (5) pumping the PVDF coating obtained in the step (S1) into a glue groove of a coating machine through a pipeline, coating the upper end of the base film at a coating speed of 5-15 m/min, and drying by using a proper amount of air flow and a proper amount of wind speed in the process of coating the coating machine.
Preferably, in step S1, the rotation speed of the stirring reaction kettle is 50-80 r/min.
Preferably, in step S2, in the tunnel-type hot air drying process, both the blowing frequency and the air draft frequency are 15 to 45 Hz.
Example 1
The PVDF coating is prepared from the following raw materials in parts by mass: polyvinylidene fluoride W #85000.5-3.0Kg, polyvinylidene fluoride-hexafluoropropylene copolymer 3Kg, acetone 200Kg, n-propanol 7.5Kg, dimethyl carbonate 6Kg, cyclohexane 1Kg and isopropanol 0.5 Kg.
Further, the thickness of the ceramic layer 2 is 0.5 mm; the thickness of the PVDF coating layer 3 was 0.5 mm.
Example 2
The PVDF coating is prepared from the following raw materials in parts by mass: 85001.5 Kg of polyvinylidene fluoride W # and 5Kg of polyvinylidene fluoride-hexafluoropropylene copolymer, 300Kg of acetone, 11Kg of n-propanol, 11Kg of dimethyl carbonate, 5Kg of cyclohexane and 1.5Kg of isopropanol.
Further, the thickness of the ceramic layer 2 is 5 mm; the thickness of the PVDF coating layer 3 was 2.5 mm.
Example 3
The PVDF coating is prepared from the following raw materials in parts by mass: 85003.0 Kg of polyvinylidene fluoride W # and 6.5Kg of polyvinylidene fluoride-hexafluoropropylene copolymer, 400Kg of acetone, 15Kg of n-propanol, 15Kg of dimethyl carbonate, 8Kg of cyclohexane and 2Kg of isopropanol.
Further, the thickness of the ceramic layer 2 is 10 mm; the thickness of the PVDF coating layer 3 was 5 mm.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. The single-layer PVDF battery diaphragm is characterized by comprising a base film, a ceramic layer arranged at the lower end of the base film and a single-layer PVDF coating layer coated at the upper end of the base film, wherein the PVDF coating is prepared from the following raw materials in parts by mass: polyvinylidene fluoride W #85000.5-3.0Kg, polyvinylidene fluoride-hexafluoropropylene copolymer 3-6.5Kg, acetone 200-400Kg, n-propanol 7.5-15Kg, dimethyl carbonate 6-15Kg, cyclohexane 1-8Kg, and isopropanol 0.5-2 Kg.
2. The single layer PVDF battery separator of claim 1, wherein the ceramic layer has a thickness of 0.5-10 mm; the thickness of the single-layer PVDF coating layer is 0.5-5 mm.
3. The method of making a single layer PVDF battery separator of claim 1, comprising the steps of:
s1, preparing a PVDF coating: weighing polyvinylidene fluoride W #8500, polyvinylidene fluoride-hexafluoropropylene copolymer and acetone according to the formula ratio, adding into a stirring reaction kettle, heating for one hour through water at the temperature of 30-80 ℃ until the copolymer is completely dissolved, stirring for one hour through the stirring reaction kettle at normal temperature, adding quantitative n-propanol, dimethyl carbonate and cyclohexane, and stirring for one hour to obtain a finished product of the PVDF coating;
s2, coating: and (5) pumping the PVDF coating obtained in the step (S1) into a glue groove of a coating machine through a pipeline, coating the upper end of the base film at a coating speed of 5-15 m/min, and drying by using a proper amount of air flow and a proper amount of wind speed in the process of coating the coating machine.
4. The method for preparing the single-layer PVDF battery separator as claimed in claim 3, wherein in step S1, the rotation speed of the stirring reaction kettle is 50-80 r/min.
5. The method for preparing the single-layer PVDF battery diaphragm as in claim 3, wherein in step S2, in the tunnel-type hot air drying process, the blowing frequency and the air draft frequency are both 15-45 Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010123732.5A CN111293261A (en) | 2020-02-27 | 2020-02-27 | Single-layer PVDF battery diaphragm and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010123732.5A CN111293261A (en) | 2020-02-27 | 2020-02-27 | Single-layer PVDF battery diaphragm and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111293261A true CN111293261A (en) | 2020-06-16 |
Family
ID=71020527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010123732.5A Pending CN111293261A (en) | 2020-02-27 | 2020-02-27 | Single-layer PVDF battery diaphragm and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111293261A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115863753A (en) * | 2022-12-30 | 2023-03-28 | 沧州中孚新能源材料有限公司 | Gel electrolyte diaphragm and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103400959A (en) * | 2013-08-19 | 2013-11-20 | 天津力神特种电源科技有限公司 | Diaphragm for lithium ion battery, production method thereof, and battery core |
| CN106784534A (en) * | 2016-08-29 | 2017-05-31 | 东莞市卓高电子科技有限公司 | The preparation method of PVDF and its copolymer ceramic coating membrane |
| CN109786622A (en) * | 2018-12-25 | 2019-05-21 | 武汉中兴创新材料技术有限公司 | A kind of coating slurry and its preparation method and application being used to prepare coated separator |
| CN110571395A (en) * | 2019-08-30 | 2019-12-13 | 瑞浦能源有限公司 | lithium ion battery diaphragm and preparation method thereof |
-
2020
- 2020-02-27 CN CN202010123732.5A patent/CN111293261A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103400959A (en) * | 2013-08-19 | 2013-11-20 | 天津力神特种电源科技有限公司 | Diaphragm for lithium ion battery, production method thereof, and battery core |
| CN106784534A (en) * | 2016-08-29 | 2017-05-31 | 东莞市卓高电子科技有限公司 | The preparation method of PVDF and its copolymer ceramic coating membrane |
| CN109786622A (en) * | 2018-12-25 | 2019-05-21 | 武汉中兴创新材料技术有限公司 | A kind of coating slurry and its preparation method and application being used to prepare coated separator |
| CN110571395A (en) * | 2019-08-30 | 2019-12-13 | 瑞浦能源有限公司 | lithium ion battery diaphragm and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115863753A (en) * | 2022-12-30 | 2023-03-28 | 沧州中孚新能源材料有限公司 | Gel electrolyte diaphragm and preparation method and application thereof |
| CN115863753B (en) * | 2022-12-30 | 2023-06-13 | 沧州中孚新能源材料有限公司 | Gel electrolyte diaphragm and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109687028A (en) | A kind of lithium ion battery with high energy density and preparation method thereof | |
| CN100438183C (en) | Medium and high temperature sealing method of plate type solid oxide fuel battery and its sealing material | |
| CN111293261A (en) | Single-layer PVDF battery diaphragm and preparation method thereof | |
| CN108987825A (en) | A kind of manufacture craft of low temperature resistant lead storage battery | |
| CN112038110B (en) | A thermally reversible hydrogel electrolyte with ultra-high strength and preparation method thereof | |
| CN113036120A (en) | Cathode material for 12V start-stop power supply, lithium ion battery and preparation method of lithium ion battery | |
| CN111584796B (en) | Composite coating diaphragm and preparation method and application thereof | |
| CN114243102A (en) | Polysiloxane solid electrolyte, solid battery, preparation method and application thereof | |
| CN111081957A (en) | Oily ceramic PVDF mixed coating battery diaphragm and preparation method thereof | |
| CN111312970A (en) | Oily large-aperture battery diaphragm and preparation method thereof | |
| CN115347319B (en) | A battery isolation film that improves JR deformation and its preparation method and application | |
| CN115939667A (en) | Lithium battery diaphragm based on lithium aluminum titanium phosphate and mullite fiber and preparation method thereof | |
| CN108675822A (en) | A kind of heat accumulation ceramic based material and preparation method thereof | |
| CN110993857A (en) | Oily PVDF (polyvinylidene fluoride) coating process for lithium battery diaphragm | |
| CN115000505A (en) | Preparation method of composite solid electrolyte | |
| CN106531928A (en) | Application of porous composite membrane in lithium-ion battery | |
| CN109935885B (en) | Glucan gel interfacial film, preparation method thereof and application thereof in solid alkali metal/alkaline earth metal battery | |
| CN110061174A (en) | A kind of method and ceramic diaphragm preparing gluing ceramic diaphragm based on sol-gel technique | |
| CN112421183A (en) | Method for continuously preparing lithium battery diaphragm by using melt spinning process | |
| CN108767284B (en) | A method of improving ultra-thin lithium electronics one-shot battery hardness | |
| CN113258208A (en) | Preparation method of high-nickel ternary special ceramic coating diaphragm | |
| CN106220888A (en) | A kind of microporous polymer electrolyte preparation method of compound ion liquid | |
| CN110364728A (en) | A kind of New Cycle type ship lead-acid accumulator negative pole lead paste and preparation method | |
| CN112349884B (en) | Laminated polar plate rapid curing and drying method | |
| CN110054793A (en) | Preparation method of high-strength gel polymer electrolyte |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200616 |